Characteristics of persons rehospitalized after stroke rehabilitation

OBJECTIVE: To develop classification models for risk of hospital readmission 80 to 180 days after discharge based the demographic and functional characteristics of persons discharged from acute inpatient rehabilitation after stroke. DESIGN: Retrospective, using information from US facilities subscribing to the Uniform Data System for Medical Rehabilitation (UDS(MR)). SETTING: Information submitted to the UDS(MR) from 1994 through 1996 by 167 hospital and rehabilitation facilities from 40 states was examined. PARTICIPANTS: A total of 15,992 records of patients (mean age +/- standard deviation, 70.97 +/- 12.19yr) with a diagnosis of stroke were included in the final sample. The sample included 52.7% women and was 80% non-Hispanic white with an average length of stay (LOS) of 25.31 +/- 14.72 days. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Six subscales of the FIM instrument (self-care, sphincter control, transfers, locomotion, communication, social cognition), total FIM, and other predictor variables for regression analysis (gender, age, ethnicity, marital status, prehospital living setting, LOS, primary payer source, level of function-related group). RESULTS: A logistic regression model included the following statistically significant variables (p <.05): ethnicity, sphincter control, self-care ability, gender, and LOS. The greatest variability occurred among men. Exactly 18.1% of non-Hispanic white men and 17.9% of African-American men were rehospitalized. In contrast, only 10.1% of Hispanic men and 11.4% of Asian men were rehospitalized. The odds of rehospitalization were lowest for Hispanic men. CONCLUSION: As prospective payment systems are introduced for postacute care, it is important that the relationship among functional abilities, demographic characteristics, and incidence of hospital readmission following medical rehabilitation be examined.     

Satisfaction with medical rehabilitation in patients with cerebrovascular impairment

OBJECTIVE: Overall satisfaction has important social and economic implications for patients who have received inpatient medical rehabilitation. We conducted this study to examine the overall satisfaction level at 3- to 6-mo follow-up for inpatients with cerebrovascular impairments discharged from medical rehabilitation. DESIGN: The study was retrospective using information from a national database representative of medical rehabilitation patients across the United States. Information submitted in 1997 and 1998 to the Uniform Data System for Medical Rehabilitation by 177 hospital and rehabilitation facilities from 40 states was examined. The final sample included 8,900 patient records. The main outcome measure was the level of satisfaction with medical rehabilitation at 80-180 days postdischarge follow-up. RESULTS: A logistic regression model including ten independent variables was used to predict satisfied vs. dissatisfied at follow-up. Three statistically significant variables were included in the final model and correctly classified 95.1% of the patients. Higher FIM instrument discharge scores were associated with increased satisfaction. Further analysis of the FIM instrument subscales indicated that higher ratings in transfers, social cognition, and locomotion were significantly associated with increased satisfaction. CONCLUSION: We identified several functional variables associated with increased satisfaction after medical rehabilitation in persons with stroke. The ability to objectively assess patient satisfaction is important as consumer-based outcome measures are integrated in accreditation and healthcare evaluation.     

Medical rehabilitation length of stay and outcomes for persons with traumatic spinal cord injury--1990-1997

OBJECTIVES: To describe changes in acute and rehabilitation length of stay (LOS) for persons with traumatic spinal cord injury (SCI), describe predictors of LOS, and explore year-1 anniversary medical and social outcomes. DESIGN: Longitudinal, exploratory study of patients with SCI. SETTING: Eighteen Model Spinal Cord Injury Centers across the United States. SAMPLE: A total of 3,904 persons discharged from the Model Systems between 1990 and 1997 who had follow-up interviews at 1 year postinjury. MAIN OUTCOME MEASURES: Rehabilitation LOS; injury anniversary year-1 presence of pressure ulcers; incidence of rehospitalization; community or institutional residence; and days per week out of residence. RESULTS: Acute rehabilitation LOS declined from 74 days to 60 days. Discharges to nursing homes and rehospitalizations increased between 1990 and 1997. Linear regression showed that lower admission motor Functional Independence Measure (FIM) scores, year of discharge from the Model System, method of bladder management, tetraplegia, race, education, marital status, discharge disposition, and age were related to longer LOS. At first anniversary, logistic regressions revealed that lower discharge motor FIM, injury level, and age were related to the presence of pressure ulcers, rehospitalization, residence, and time spent out of residence. Of those discharged to nursing homes, 44% returned to home by year 1, and these individuals had higher functional status and were younger. DISCUSSION: High functional status is associated with shorter LOS, discharge to the community, and time spent out of residence, indicating efficiency in the system. For 44.4% of individuals one or more of the following outcomes were observed by first year anniversary: rehospitalization; residing in a skilled nursing facility; having pressure ulcers; or infrequently leaving one's residence.     

Outcome after rehabilitation for total joint replacement at IRF and SNF: a case-controlled comparison

OBJECTIVE: The objective of this study was to determine whether outcomes differed between patients with single knee or hip joint replacement surgery undergoing rehabilitation in an inpatient rehabilitation facility (IRF) vs. skilled nursing facilities (SNFs). DESIGN: A retrospective chart review was performed on 87 pairs of patients treated in either an IRF or a SNF matched for age, gender, type of surgery, and Functional Independent Measure (FIM) motor score at admission. All patients discharged from the IRF for rehabilitation following single hip or knee replacement surgery in 2004 were eligible for comparison with index cases discharged from SNFs with the same diagnosis in 2004. At discharge, FIM motor scores, device used for ambulation, ambulation distance, disposition, and length of stay (LOS) were recorded. RESULTS: The mean LOS of IRF-treated patients was 10.3 +/- 3.3 days, compared with 20.0 +/- 10.8 days for SNF-treated patients (P < 0.005). A significantly higher percentage of IRF-treated patients were discharged directly home (IRF: 89.5%; SNF: 79.1%; P < 0.029). The mean discharge locomotion FIM score for IRF-treated patients was 5.71 +/- 0.91 compared with 4.90 +/- 1.92 for the SNF-treated patients (P < 0.004). At discharge, the mean ambulation distance of patients treated at the IRF was of 380 +/- 168 feet compared with 289 +/- 212 feet for patients treated at SNFs (P < 0.005). Significantly more of the SNF-treated patients required a walker (80.2%) for ambulation at discharge compared with patients treated at the IRF (38.3%, P < 0.001). Of the patients who were discharged home, 75% of the SNF-treated patients required homecare services compared with 41.2% of the IRF-treated patients (P < 0.001). CONCLUSION: When patients were matched for age, gender, operative diagnosis, and admission ambulation FIM, those who received rehabilitation in the IRF had, on average, a shorter length of stay and superior functional outcomes than those treated in SNFs.     

Orthopedic Subacute Rehabilitation—Predictors of Functional Outcome and Resource Utilization

The purpose of this study was to determine what factors predict resource utilization and outcomes in patients recovering from an acute care orthopedic treatment episode in facilities offering subacute rehabilitation. We obtained data from a subacute orthopedic rehabilitation program offered at a continuing care facility. We obtained administrative and follow-up data for a case series of 779 patients undergoing subacute rehabilitation following an acute care hospital stay for an orthopedic condition. We administered the Functional Independence Measure (FIM) at admission, discharge, and 12 weeks postsubacute discharge. We estimated resource utilization through the calculation of subacute length of stay. A regression model explaining 30% of the variance in subacute length of stay (SLOS) contained admission motor FIM score, acute care length of stay (LOS), age, and lower leg/ankle fracture. A regression model explaining 85% of the variance in motor functional gain contained admission motor FIM score, lower/leg ankle fracture, and knee replacement. These results indicate that admission functional status is the key predictor of both SLOS and functional change. Prediction of 12-week functional change was more successful than prediction of SLOS.     

Gender-related differences in acute rehabilitation lengths of stay, charges, and functional outcomes for a matched sample with spinal cord injury: a multicenter investigation

OBJECTIVE: To examine the effects of gender on length of stay (LOS), treatment costs, and outcomes by using a matched sample of patients with spinal cord injury (SCI). DESIGN: A 2 x (15 x 3) mixed, block design was used retrospectively to analyze the impact of gender on subjects matched for age, American Spinal Injury Association (ASIA) motor impairment classification, and level of neurologic injury. SETTING: Twenty medical centers in the federally sponsored Spinal Cord Injury Model Systems project. PARTICIPANTS: One thousand seventy-four adult patients with SCI admitted between 1988 and 1998 were assessed at acute-care admission, inpatient rehabilitation admission, and inpatient rehabilitation discharge. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: ASIA motor index and FIM instrument admission, discharge, and efficiency scores; rehabilitation LOS and medical care charges; and discharge disposition. RESULTS: Analysis revealed no gender-related differences in FIM motor scores on admission and discharge. No differences in FIM motor efficiencies or daily change were observed. No significant differences were found for ASIA motor scores on acute-care admission and rehabilitation discharge. No differences in acute rehabilitation LOS and charges were observed. No gender-related differences were seen in the likelihood of discharge to an institutional setting. CONCLUSION: Gender was not a significant factor in functional outcome of SCI patients after acute rehabilitation.     

Orthopedic impairment after medical rehabilitation: functional performance and satisfaction with community participation

OBJECTIVE: To determine the prevalence of satisfaction with community participation and to examine associations between change in functional status and satisfaction with community participation for persons with orthopedic impairments. DESIGN: Retrospective study of 3832 patients discharged from medical rehabilitation facilities in 2001 using information from the IT Health Track database. RESULTS: Primary measures were the FIM instrument and satisfaction with community participation. The majority of patients (86.9%) were satisfied (very or somewhat) with their level of community participation. Positive-change scores in FIM total from admission to the 80- to 180-day follow-up were associated with an 8% increased odds of being in a higher satisfaction with community participation level (odds ratio, 1.08; 95% confidence interval: 1.07, 1.09) after controlling for age, gender, marital status, race/ethnicity, insurance source, length of stay and functional status. Similarly, positive-change score in motor (odds ratio, 1.09; 95% confidence interval: 1.08, 1.10) and cognition (odds ratio, 1.26; 95% confidence interval: 1.19, 1.32) FIM measures from admission to follow-up were associated with greater satisfaction with community participation. CONCLUSION: Gains in functional status were significantly associated with greater satisfaction with community participation. Satisfaction with community participation provides information useful to evaluate patient recovery after discharge from inpatient medical rehabilitation.     

Toward benchmarks for stroke rehabilitation in Ontario, Canada

OBJECTIVE: Canadian benchmarking data do not exist for stroke rehabilitation services. This study used the FIM-function-related group (FIM-FRG) classification system to group patients and to describe the outcomes within each group. The intent was to begin to develop benchmarks for persons recovering from stroke in Canadian rehabilitation facilities. DESIGN: 561 patients were stratified into the nine categories of the FIM-FRG system. Length of stay (LOS), total FIM gain, total FIM at discharge, and discharge location were described for each category. RESULTS: Mean waiting time to rehabilitation admission was 29.7 days. Mean LOS was 49.2 days. Mean admission and discharge total FIM ratings were 78.1 and 103.1, respectively. FIM gain ranged from 8 to 37. Seventeen percent of patients were discharged to nursing homes, with rates ranging from a low of 0% (FRG 8 and 9) to a high of 60% (FRG 2). CONCLUSIONS: For the nine FIM-FRG groups, LOS was considerably longer in the Canadian facility than in the United States, and total FIM score at discharge was higher in Canada. This is likely related to differences in the healthcare systems of the two countries and confirms the need to develop benchmarks based on Canadian data.     

Effect of functional gain on satisfaction with medical rehabilitation after stroke

OBJECTIVE: To examine the association between gain in motor and cognitive functional status with patient satisfaction 3-6 mo after rehabilitation discharge. DESIGN: Patient satisfaction and changes in functional status were examined in 18,375 patients with stroke who received inpatient medical rehabilitation. Information was obtained from 144 hospitals and rehabilitation facilities contributing records to the Uniform Data System for Medical Rehabilitation and the National Follow-up Services. RESULTS: Data analysis revealed significant (P < 0.05) differences in satisfaction responses based on whether information was collected from patient self-report or from a family member proxy, and the two subsets were analyzed separately. Logistic regression revealed the following significant predictors of satisfaction for data collected from stroke patients: cognitive and motor gain, rehospitalization, who the patient was living with at follow-up, age, and follow-up therapy. In the patient-reported data subset, compared with patients who showed improved cognitive or motor functional status, those with no change, respectively, had a 31% and 33% reduced risk of dissatisfaction. In addition, rehospitalized patients had a higher risk of dissatisfaction. For the proxy reported data subset, significant influences on satisfaction were health maintenance, rehospitalization, stroke type, ethnicity, cognitive FIM gain, length of stay, and follow-up therapy. CONCLUSIONS: Ratings of satisfaction with rehabilitation services were affected by change in functional status and whether the information was collected from patient rating or proxy response.     

The effect of Medicare's Prospective Payment System on patient satisfaction: an illustration with four rehabilitation hospitals

OBJECTIVE: To examine the impact of Medicare's Prospective Payment System (PPS) on patient satisfaction at four inpatient rehabilitation hospitals. DESIGN: Prospective study using a satisfaction survey to examine the effects of Medicare's PPS for rehabilitation hospitals. Surveys were conducted at four affiliated rehabilitation hospitals in the Midwest. RESULTS: Patient characteristics varied only slightly pre- to post-PPS, and several characteristics were related to overall satisfaction, including motor functional gain, discharge to home, and respondent (patient or proxy). A 12-point increase on a 12-item motor function scale resulted in 1.13 greater odds (95% CI: 1.04, 1.24) of reporting excellent satisfaction. Patient respondents were 1.27 times more likely (95% CI: 1.07, 1.50) than proxies to report excellent satisfaction, and patients discharged home were 1.65 times more likely (95% CI: 1.31, 2.07) to report excellent satisfaction than patients discharged elsewhere. We found an increase in observed satisfaction from 60.3 to 63.4% (P < 0.05) after PPS implementation, despite a decrease in motor FIM gain. CONCLUSIONS: Patient characteristics such as motor FIM gain, discharge status, and respondent type were significantly associated, although only slightly, with patient satisfaction in inpatient rehabilitation. Percentage of excellent satisfaction improved at these four facilities after PPS implementation, despite declines in motor FIM gain. The improvement may be the result of numerous ongoing quality-improvement initiatives directed at improving patient satisfaction at these facilities.     

Clinical characteristics and rehabilitation outcomes of patients with posterior cerebral artery stroke

OBJECTIVES: To describe the demographics, clinical profile, and functional outcomes in posterior cerebral artery (PCA) stroke and to identify factors associated with functional change during rehabilitation and discharge disposition. DESIGN: Retrospective study of patients with PCA stroke admitted to a rehabilitation hospital over an 8-year period. SETTING: Free-standing urban rehabilitation hospital in the United States. PARTICIPANTS: Eighty-nine consecutive patients with PCA stroke (48 men, 41 women; mean age, 71.5y) met inclusion criteria. INTERVENTION: Inpatient multidisciplinary comprehensive rehabilitation program. MAIN OUTCOME MEASURES: Demographic, clinical, and discharge disposition information were collected. Functional status was measured using the FIM instrument, recorded at admission and discharge. The main outcome measures were the discharge total FIM score, the change in total FIM score (DeltaFIM), and the discharge disposition. Multiple and logistic regression analyses were performed to identify factors associated with the main outcome measures. RESULTS: The most common impairments were motor paresis (65%), followed by visual field defects (54%) and confusion or agitation (43%). The mean discharge total FIM score +/- standard deviation was 88.3+/-28.2. The mean DeltaFIM was 23.3+/-16.4. Fifty-five (62%) patients were discharged home. On multiple regression analysis, higher admission total FIM score, longer length of stay (LOS), and a rehabilitation stay free of interruptions were associated with higher discharge total FIM score and greater DeltaFIM. Absence of diabetes mellitus and younger age were also associated with higher discharge total FIM scores, and male sex had greater DeltaFIM. On logistic regression analysis, younger patients, higher discharge FIM scores, presence of a caregiver, and the nonnecessity for 24-hour support were associated with a discharge to home. CONCLUSIONS: Motor, visual, and cognitive impairments are common in PCA stroke, and good functional gains are achievable after comprehensive rehabilitation. Higher admission FIM scores, longer LOS, and younger and male patients were associated with better functional outcomes. Most patients were discharged home, particularly those with caregivers and those for whom 24-hour support was not required. Further research should aim at the development of functional outcome measures of greater breadth and sensitivity to visual and cognitive deficits and should compare PCA stroke outcomes with outcomes of strokes in other vascular territories.     

Outcomes in total knee arthroplasty patients after inpatient rehabilitation: influence of age and gender

OBJECTIVES: To examine age and gender effects on outcomes after inpatient rehabilitation in primary total knee arthroplasty (TKA) and revision TKA patients. DESIGN: This retrospective, comparative study was conducted in a 50-bed, university-affiliated rehabilitation hospital. Patients included primary TKA patients (n = 286) and revision TKA patients (n = 138) placed into one of three age brackets: <60 yrs, 60-70 yrs, or >70 yrs. Measurements included length of stay (LOS), FIM scores, hospital charges, and discharge disposition location. RESULTS: FIM scores improved from admission to discharge in both primary and revision patients (P = 0.015). LOS was shorter in primary than revision patients (8.3 vs. 10.4 days, P = 0.001), and the LOS was longest in patients >70 yrs compared with those <60 or 60-70 yrs (10.6 vs. 8.7 and 8.8 days, respectively; P = 0.004). FIM efficiency was greater in primary than in revision TKA patients (3.68 vs. 2.77 points/day, P = 0.001), and greater for men than women in each age bracket regardless of TKA type (3.68 vs. 2.78 points/day, P = 0.001). Total hospital charges were lower for men than women for both TKA types ($9,656 +/- 823 vs. $11,544 +/- 1,359; P = 0.015), and were highest in patients >70 yrs of age (P = 0.015). CONCLUSIONS: Primary and revision TKA patients make improvements in functional independence during inpatient rehabilitation. Although FIM gains were similar among age and gender groupings, FIM efficiency is lowest in women. Despite similar daily hospital costs among the groups, slower progress with functional gains (decreased FIM efficiency) increases the LOS and total hospital charges, especially in older women.     

Predicting goal achievement during stroke rehabilitation for Medicare beneficiaries

Abstract

Purpose: Few studies have investigated the ability of treatment teams to predict functional improvement and whether an association between predicted goals and discharge function in patients with stroke exists. This study investigated goal prediction during stroke rehabilitation delivered in inpatient rehabilitation facilities (IRF) and the factors associated with goal prediction. Methods: A serial, cross-sectional design analyzing the Medicare IRF Patient Assessment Instrument dataset. The sample included 179?479 admissions for stroke aged over 65 years in 968 IRFs. Generalized estimating equations (GEE) controlled for facility cluster effects were used for analysis of time trends for length of stay (LOS), predicted Functional Independence Measure (FIM) scores, discharge FIM scores and predicted-discharge difference FIM scores (goal FIM scores minus discharge FIM scores). GEE models were employed to determine the correlation between predicted FIM and discharge FIM scores and factors associated with goal achievement. Results: Mean LOS, predicted FIM scores and discharge FIM scores decreased 1.8?d, 2.2 points and 3.6 points, respectively, while predicted-discharge difference FIM scores increased 1.3 points. Discharge goals were not met 78.9% of the time. After controlling for patient characteristics, each predicted FIM point was associated with 0.6 discharge FIM points (p?<?0.0001). Factors associated with not meeting or exceeding goals were: age (odds ratio; OR?=?0.997), African Americans (OR?=?0.905), number of comorbidities (OR?=?0.970), number of complications (OR?=?0.932) and right brain stroke (OR?=?0.869). Factors associated with meeting or exceeding goals were: LOS (OR?=?1.03), admission FIM score (OR?=?1.02) and females (OR?=?1.05). Conclusions: Trends for lower goals and lower discharge function occurred over time. A correlation existed between predicted FIM scores and discharge FIM scores. Patient factors were associated with goal achievement.

• Implications for Rehabilitation

• Using the Functional Independence Measure, rehabilitation teams set lower goals for stroke rehabilitation in inpatient rehabilitation facilities during first 5.5 years of the IRF-PAI dataset.

• Discharge FIM scores also trended lower and fell at faster rate than goal FIM scores.

• Teams’ goal FIM scores averaged nearly 12 points higher than discharge FIM scores, and over 75% of patients did not reach goals for the rehabilitation stay.

• Factors associated with meeting or exceeding goals were: length of stay, admission FIM scores and being a female. Factors associated with not meeting or exceeding goals were: age, number of comorbidities and complications, having a right-brain stroke and being African American.

     

Rehabilitation of postcardiac surgery stroke patients. Progress,outcomes, and comparisons with other stroke patients

OBJECTIVE: To examine the demographics, progress, and functional outcomes of all postcardiac surgery stroke patients admitted to the rehabilitation unit of an acute, tertiary general hospital over a 5-yr period and to compare this cohort with an age-matched control group of other stroke patients admitted during the same period. DESIGN: A retrospective chart review of 47 postcardiac surgery stroke and a matched control group of other stroke patients admitted to the rehabilitation unit. RESULTS: The mean age of the postcardiac surgery stroke patients was 70.80 +/- 8.37 yr, with 60% of patients being male. Their average length of stay on the rehabilitation unit was 15.64 +/- 11.96 days. Mean admit FIM total score was 65.64 +/- 16.33, with a discharge FIM total score of 86.77 +/- 18.93. Mean admit FIM motor score was 41.47 +/- 9.45, with a discharge FIM motor of 60.74 +/- 13.20. The other stroke group had significantly greater admit FIM total (P = 0.03), admit motor (P = 0.001), and discharge motor (P = 0.025) scores. FIM efficiency and motor and cognitive gains were comparable between the two groups. Length of stay on the rehabilitation unit was approximately 2 days less (P = 0.224) for the other stroke cohort. Ultimately, 39 (83%) of the postcardiac surgery stroke patients were discharged to the community compared with 45 (96%) of the other stroke patients (P = 0.19). CONCLUSIONS: The majority of postcardiac surgery stroke patients successfully completed a comprehensive inpatient rehabilitation program. They had lower admit FIM total scores and admit and discharge FIM motor scores than the other stroke group and were almost as likely to ultimately return to the community.     

Examination of follow-up therapy in patients with stroke

OBJECTIVE: Examine the patterns and effect of follow-up therapy for persons with stroke. DESIGN: Retrospective analysis of national inpatient medical rehabilitation facilities and follow-up survey data from 1994 to 2001. A total of 45,164 patients received inpatient medical rehabilitation after a stroke. The mean age (+/- standard deviation) was 69.5 (+/-12.8) yrs, 48% were women, and 77% were non-Hispanic white. Average length of stay was 21.9 (+/-14.2) days. RESULTS: The highest gain in FIM instrument ratings for follow-up therapy was associated with a discharge FIM rating of > or =65. Patients with FIM ratings > or =65 at discharge who received follow-up therapy gained an average of 19.4 points between discharge and follow-up assessment compared with a mean gain of 15.1 points for persons who did not receive follow-up therapy. Validity was examined using 100 bootstrap replications. The percentage of persons with FIM instrument scores of > or =65 receiving follow-up therapy increased from 38% in 1994 to 58% in 2001. CONCLUSIONS: The differences in postdischarge FIM gains between patients with and without follow-up therapy were greatest among patients with discharge FIM instrument ratings of > or =65. Compared with patients whose discharge FIM ratings were >65, patients with discharge FIM scores of > or =65 who underwent follow-up therapy demonstrated substantially greater average postdischarge FIM gains than those with FIM ratings of >65.     

The Uniform Data System for Medical Rehabilitation report: patients discharged from subacute rehabilitation programs in 1999

This is the third annual report describing patients discharged from subacute rehabilitation programs in the United States that subscribe to the Uniform Data System for Medical Rehabilitation (UDSmr). The analysis included 39,562 complete records of first admission cases discharged alive from 180 facilities in 1999. Sixty-five percent of the patients were women, and most patients (91%) were white. Sixty-two percent of the patients were 75 yr of age or older. Before the impairment onset, 55% lived with at least one other person. The average total FIM (motor and cognitive) score change for all patients was 21.1 points, and when stratified by rehabilitation impairment group, average scores ranged from 18.3 for patients with pulmonary conditions to 25.3 for patients with a joint replacement. The percentage of patients discharged to a community-based setting ranged from 67% for patients with stroke to 94% for patients with a joint replacement. These data show that patients receiving care in subacute rehabilitation programs show measurable functional improvement and that a high percentage of patients are discharged to community-based settings.     

Vitamin D status of patients admitted to a hospital rehabilitation unit: relationship to function and progress

OBJECTIVE: The primary objective was to determine the association between vitamin D status, baseline function, and short-term inpatient rehabilitation progress. DESIGN: This was a prospective convenience sampling of 100 patients in a tertiary general hospital rehabilitation unit (RU). The cohort comprised men and women of mixed race with a variety of diagnoses (mean age 70 yrs). Patient histories and demographic information were obtained by patient interview and chart review. Serum 25-hydroxyvitamin D (25OHD) (nmol/L) was measured on or after the day of admission. The Functional Independence Measurement (FIM) instrument, a validated survey tool, was used to measure function at admission and discharge. RESULTS: Eleven percent of the patients were overtly vitamin D deficient, with serum 25OHD concentrations <20 nmol/L. Ninety-four percent of the patients had serum 25OHD concentrations below the recommended minimum optimal concentration of 80 nmol/L. Using the Spearman rank correlation test, low serum 25OHD was weakly but significantly associated with low total FIM scores: r = 0.25 (P < 0.012) and r = 0.23 (P < 0.021) for admission and discharge total FIM score, respectively. Patients with serum 25OHD concentrations greater than the median value of 41.3 nmol/L had significantly higher FIM efficiency scores (discharge total FIM score - admission total FIM score/length of stay [LOS]) than the subgroup of patients below the median (2.0 +/- 1.1 vs. 1.6 +/- 0.9, respectively; P < or = 0.026). Serum 25OHD was not significantly correlated with FIM efficiency or the unadjusted change in total FIM score (discharge total FIM score - admission total FIM score), but it was significantly correlated with LOS (the lower the serum 25OHD concentration, the longer the LOS, and vice versa; r = -0.235, P < 0.018). Thus, the difference in FIM efficiency between patients with serum 25OHD above and below the median was the result of the significant inverse correlation between serum 25OHD and LOS; as a group, patients with serum 25OHD above the median had a 19% shorter LOS than the group with serum 25OHD below the median value (11.4 +/- 4.9 vs. 14.1 +/- 5.6 days, respectively; P = 0.005). CONCLUSIONS: Most patients in a hospital RU had a suboptimal serum 25OHD concentration, reflecting what has previously been observed in hospitalized patients in general and also the population at large. Although no specific physical deficits or attributes could be directly attributed to low serum 25OHD, the baseline functional status of RU patients, LOS, and progress attributable to inpatient rehabilitation (FIM efficiency) were favorably affected by higher serum 25OHD concentrations.     

The effects of dehydration on rehabilitation outcomes of elderly orthopedic patients

OBJECTIVE: To study the effects of dehydration, by using the indices of prerenal azotemia and orthostasis, on the rehabilitation outcomes of elderly orthopedic patients. DESIGN: Prospective, pilot study. SETTING: Regional inpatient rehabilitation center. PARTICIPANTS: A consecutive sample of 39 patients (29 women, 10 men), ranging in age from 58 to 94 years (mean, 78y), of whom 13 had total hip replacements, 12 had total knee replacements, and 14 had hip fractures. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Length of stay (LOS), change in the FIM trade mark instrument score, and discharge to home. RESULTS: The mean LOS was significantly longer in the group with prerenal azotemia (n=21, 12.9+/-3.0d, t=2.49, P<.01) than in the nonazotemic group (n=18, 9.4+/-4.6d). LOS was also significantly longer in the orthostatic group (n=18, 13.7+/-3.4d, t=2.94, P<.01) than in the nonorthostatic group (n=21, 9.8+/-3.9d). Two-way analysis of variance showed a statistically significant effect on LOS for both azotemia (F=8.4, P=.006) and orthostasis (F=10.5, P=.003). A statistical interaction existed (F=4.7, P=.038), but it was more pronounced in the absence of both conditions, as opposed to the presence of both. LOS for the group with both azotemia and orthostasis was 13.6+/-2.7 days (n=10, F=4.7, P=.038), in contrast to 7.2+/-2.8 days in the group without either condition (n=10). Of the patients who had neither azotemia nor orthostasis, 100% (n=10) went home; 80% (n=8) of patients who had both conditions went home. Logistic regression analysis, however, did not show a statistically significant correlation between discharge to home and the presence of azotemia, orthostasis, or both. CONCLUSION: Prerenal azotemia and orthostasis are present in a significant number of elderly orthopedic patients and have a major effect on rehabilitation outcomes.     

A preliminary examination of the CMS eligibility criteria in total-joint arthroplasty

OBJECTIVE: To analyze inpatient rehabilitation outcomes in total-knee arthroplasty (TKA) and total-hip arthroplasty (THA) patients using the 2004 Medicare 75% rule criteria. DESIGN: This retrospective study compared outcomes in unilateral TKA (UTKA), bilateral TKA (BTKA), and THA after interdisciplinary inpatient rehabilitation (n = 867). Patients were separated into three comparison pairs: 1) UTKA or BTKA, 2) age <85 yrs or > or =85 yrs, and 3) body mass index (BMI) <50 or > or =50 kg/m. Length of stay (LOS), functional independence measure (FIM) scores (total, motor, and cognitive), hospital charges, FIM efficiency, and discharge disposition were analyzed. RESULTS: BTKA improved total FIM score more than UTKA (43 vs. 38%; P = 0.039). TKA with BMI > or =50 kg/m had similar admission and discharge FIM motor scores compared with BMI <50 kg/m (P > 0.05). TKA patients > or =85 yrs had lower admission FIM scores, longer LOS (11.3 vs. 9.4 days), and 22% higher total charges than TKA patients younger than 85 yrs (P = 0.042). THA patients > or =85 yrs had 6-10% lower total FIM, FIM motor, and FIM cognition scores and were discharged to home less frequently than younger patients (P < 0.05). Total and daily charges were 21-162% higher in THA patients with BMIs > or =50 kg/m than in THA patients with BMIs <50 kg/m (P < 0.045). CONCLUSION: All patients made functional gains during rehabilitation. However, the most costly and lengthy rehabilitation occurred in TKA patients > or =85 yrs and THA patients with BMI > or =50 kg/m.