First-Year Outcomes after Stroke Rehabilitation : A Multicenter Study in Thailand

Stroke affects the long-term quality of life and the well-being of patients and families. Stroke patients gain benefits from rehabilitation. Authors reported 1-year outcomes of stroke rehabilitation in 327 patients registered to the Thai Stroke Rehabilitation Registry. The outcomes included death rate, readmission rate, functional ability score (Barthel Index, BI), and factors affecting BI score. Of 327 patients, 214 (65.4%) had adequate follow-up data for analysis. The average age was 62.1 ± 12.5 years, and 57.9% were male.Themortality ratewas 2.5% and the readmission ratewas 11.2%.Thenumber of the patients who could function independently increased from 5.5% at discharge to 22.9% and 25.5% at month 6 and month 12, respectively. The change in functional ability level of 214 patients included improvement (51.5%), deterioration (12.8%), and equivocal (35.7%). The low functional score at month 12 was significantly correlated with longer length of stay (LOS), longer onset to admission interval, and higher depression score at month-12. In conclusion, approximately half of the patients had an improvement in the disability level for at least one grade at 1-year follow-up.The low functional score by the end of the first year is associatedwith longer LOSduring the first admission, delay in rehabilitation program, and psychological depression.


Introduction
Stroke is one of the leading causes of mortality [1].It is the most common cause of physical and mental disability in the elderly worldwide, particularly East Asian populations [2].It affects the long-term quality of life and well-being for both the patients themselves and their families.Stroke patients need medical rehabilitation to enable optimal functions that will overcome the patient's disability.A Canadian guideline in 2008 recommended that all stroke patients should receive rehabilitation therapy as soon as their medical conditions were stable [3].Rehabilitation for stroke patients has been shown to improve functional ability of stroke survivors and to decrease burden of their families and society [4].
The outcomes of stroke and rehabilitation vary among patients.Teasell et al. revealed, the evidence-based stroke rehabilitation care which is more efficient in functional gain, had fewer complications, had lower mortality rate, and had lower need for institutionalization [5].The median length of survival among ischemic stroke patients independent in daily living was longer than that of those who are dependent (9.7 years (95% CI 8.9 to 10.6) versus 6.0 years (95% CI 5.7 to 6.4), resp.)[6].The result from rehabilitation affects not only longer survival period but also the quality of life of stroke patients for functional independence [6][7][8].
Thai Stroke Rehabilitation Registry (TSRR) was the first multicentre and hospital-based registry in Thailand.It was founded in 2008 by a group of rehabilitation medicine specialists of six university hospitals and three rehabilitation centres [9].The patients in TSRR received conventional rehabilitation program including range of motion (ROM) exercise for the paralyzed limb to prevent contracture, strengthening exercise for the sound limb to strengthen muscles, balancing training, and ambulation training if possible.In addition, activities to improve hand functions and self-care training were also rehabilitated.They were discharged from hospitals when they reached the rehabilitation goals or when their Barthel Index (BI) scores were stable for 2 consecutive weeks.In 2009, we reported the immediate outcomes of the patients at the time of discharge from rehabilitation wards [10].In this study, we presented the outcomes of stroke patients in TSRR at the first year after discharge from rehabilitation ward and its correlated factors in order to find the long-term effect of receiving intensive rehabilitation.

Materials and Methods
The present prospective study was conducted on a cohort of stroke patients in TSRR project which was a multicenter registry established in 2008 [9].The study was conducted in accordance with the ethical principles stated in the most recent version of the Declaration of Helsinki.The study protocol was approved by the Institutional Review Board of 9 tertiary hospitals.
The outcomes of the rehabilitation inpatient period of 327 patients in TSRR were reported in our previous study [10].After discharge from rehabilitation ward, the patients were followed up at month 6 and month 12.All patients or their representatives signed an informed consent to release the information for the present study.The inclusion criteria of this study were all subjects from TSRR who could be followed up.The patients whose follow-up data were not available due to any reasons, for example, unable to contact, living in rural areas, or being unable to come to the hospitals, were excluded from the study.
Demographic data including age, sex, type of stroke, bowel/bladder problems, and associated medical diseases of the patients were recorded using a structured record form.The assessment of all outcomes was performed at the hospital setting at month 6 and month 12.At each follow-up visit or appointment, the patients were interviewed or evaluated for the continuing home programs, types of vocations, sources of income, readmission rate, and mortality rate.The patients who were able to come to the hospital were evaluated for self-care and mobility functions using the BI (score 0-20; the higher score means the better functions) [11].The BI represents severity of disability and is categorized into 5 scales according to the scores.Those were very severely disabled (score 0-4), severely disabled (score 5-9), moderately disabled (score 10-14), mildly disabled (score [15][16][17][18][19], and independent (score 20) [12].
In addition, factors associating with the change of BI between 1-year follow-up and discharge periods were also explored.Those factors were sex, age, previous stroke, length of stay (LOS), type of stroke, having medical diseases, onset to admission interval, perceptual dysfunctions, having bowel/bladder dysfunctions, having complications during admission from previous study (TSRR), and anxiety and depression scores at month 12.The anxiety and depression scores were evaluated using the Thai version of the Hospital Anxiety and Depression scale (HADS) [13].It is composed of 14 items of 2 dimensions of anxiety and depression.The score ranges from 0 to 21 for each dimension.Patients who had a score ≥11 of each part were considered as having clinical anxiety or depression.

Statistical Analysis
Data was collected at baseline (discharge period of TSRR project), month 6, and month 12 and was presented in mean and standard deviation (SD), or number () and percent (%).Kolmogorov-Smirnov test was used to examine the normality of data distribution.The functional ability levels of each visit were compared using Chi-square.Unpaired -test was used to survey the factors associating with the change of BI score.The factors with a  value less than 0.2 were entered into multiple linear regression analysis because there were chances that those might be confounders in a multiple linear regression even though they were not significant in univariate analysis [14].
Concerning the continuing programs after discharge from hospital, almost all of the continuing programs, except acupuncture, were home-based rather than institutionalbased programs.The top three programs that patients still performed at home were ROM exercise (88.6%), balance training (71.3%), and Thai traditional massage (TTM, 43.6%) (Table 2).Only 28 cases (13.1%) could continue working on their own jobs.Nearly half of them could work full time.The main sources of income came from their relatives (54.5%), their own pensions (29.1%), or their spouses' pensions (10.3%).
Table 3 presents the number (percentage) of patients classified according to the severity of disability level at discharge, month 6 and month 12.The number of the patients who were moderately to severely and very severely disabled decreased while number of the patients who could function independently increased from 5.5% at discharge to 22.9% and 25.5% at month 6 and month 12 respectively.Table 4 shows the association between the severity of disability levels at discharge and at month 12. Approximately half (101 from 196, 51.5%) of the patients had improvement of the disability level for at least 1 grade, 25 patients (12.8%) got deterioration whereas 70 (35.7%)had no change in disability level.
Table 5 demonstrates the factors associated with the change in BI score between 1-year follow up and discharge periods.Only 196 from 214 patients have completed data on BI.After using multiple linear regression analysis, LOS ≥ 1 month, onset to admission interval ≥3 months, and depression score at month 12 of ≥11 were independent factors associating with poor functional score at 1-year follow up period.

Discussion
Our result showed that the functional outcome (BI) at month 6 and month 12 increased significantly compared to the score at discharge.It may be because most patients continued rehabilitation program at home after discharge.Vibo et al. reported disability level using the BI score of stroke patients at month 12 and found that 31% of patients were mildly to moderately disabled (BI score = 10-19), 54% were very severely disabled (BI score = 0-4), and 15% were independent (BI score = 20) [15].Compared with our results, only 3.1% were very severely disabled, 60.7% were mildly to moderately disabled, and 25.5% could function independently.However, Vibo's data and ours could not directly be compared because the patients in Vibo's study were in acute stage while ours were in a rehabilitation phase.In contrast, our subjects were more stable and able to receive rehabilitation program in an inpatient ward.Therefore, our patients seemed to have better outcomes than Vibo's study.
There are pieces evidence concerning various predictors for the recovery of functional ability during the first year after stroke.Those significant predictors are age and baseline disability [15][16][17][18].The study of Khan et al. reported that older age was one of the independent predictors of poor functional outcome with adjusted OR of 2.1 [19].In our study, the independent factors associated with the improvement in functional score included LOS, onset to admission interval, and depression score.In contrast to previous studies, we did not find the association between the functional score and age.This might be due to the fact that our subjects were younger than others.Moreover, our subjects had high functional score at the time of discharge and nearly half of them were classified as mildly disabled and independent groups.The relatively young patients would have faster recovery resulting in shorter LOS as shown in our data.Most of our subjects performed continuing home programs, that is, ROM exercise, and balancing and ambulation training after discharge.Consequently, the percentage of mildly disabled to independent groups was higher (68.3%) compared to that of moderately to severely and very severely disabled ones (31.7%) at 1-year follow up.The rehabilitation outcomes depend on patients' continuing program as reported by Legg et al. [8].The authors stated that community stroke rehabilitation could reduce the incidence of functional deterioration and maintain or improve activities of daily living (ADL).Van Peppen et al. found strong evidence that taskoriented exercise training could restore balance and gait, and strengthen the lower paretic limb, when applied intensively and early after stroke onset [20].In addition, stroke survivors got benefit from participation in physical activity and exercise training [21].All of these pieces of evidences may support the benefits of rehabilitation program for stroke patients.In contrast, Aziz et al. performed the Cochrane review in 2008 to investigate the effect of the long-term therapy-based rehabilitation interventions in functional ability for stroke patients.They found that there was inconclusive evidence on whether therapy-based rehabilitation intervention one year after stroke can affect the proportion of participants who had deteriorated or were dependent in personal activities of daily living.This may due to quality of trial included [22].
Concerning the complementary and alternative medicine (CAM), the most preferable CAM used on our patients was TTM followed by acupuncture.The TTM is popular among Thai people because it provides sense of comfort from muscle relaxation effect.Moreover, TTM is easy to access as this service is available all over our country.Some believe that massage can improve neurological recovery.Apart from massage, acupuncture is also one of the most popular CAMs among Thai people.Some physicians prefer to use acupuncture in addition to the conventional programs for decreasing pain and muscle spasm [23].It is carried out for 2-3 cycles of treatment with each of 10-12 sessions.In 2007, a metaanalysis by Shiflett revealed that acupuncture was an effective adjunctive treatment for facilitating stroke recovery [24].
The limitation of this study was the only 65.4% of stroke patients could be followed up for at least one year.As nearly 40% of our subjects lived in rural areas, the shortage in patients' transportation facility might be the major obstacle to follow-up the patients at the hospitals.However, the first year mortality rate of 2.5% in our population was much lower than that in other studies whose mortality rates varied from 14 to 44% [15][16][17]25].This could be due to a possibility that younger subjects or those with TIA were recruited.There are plenty of evidence showing that the mortality rate increases with age of the patients [16,17,26].Musicco et al. found that the mortality rate in stroke patients increased 2-fold for the 74-years-old patients compared with the 65-years-old parients and the rate increased to 5-fold in the group of patients older than 75-years-old compared with those younger than 65 years old [27].Liu et al. reported that advanced age was one of the independent predictors for the first year mortality rate (hazard ratio, HR = 5.65, 95% CI = 4.54-8.23)[25].Our subjects were of a younger age group compared to those in other studies.However, the mortality rate in our study may be underestimated due to the large number of patients (31.2%) who were lost to follow up.It is possible that some patients may have died in the year following stroke.Therefore, this should be interpreted with caution that our results only represent data of stroke patients who could be followed up.These patients might have better physical condition and higher economical status, and as a result they would have better outcomes than the lost-to-follow-up subjects.

Conclusions
Approximately half of the patients had an improvement in the disability level for at least one grade at 1-year follow-up compared to those of at discharge.The low functional score by the end of the first year is associated with longer LOS during the first admission, delay in rehabilitation program, and psychological depression.

Table 1 .
The average age was 62.1 ± 12.5 years old and 57.9% were male.Most patients were married (70.6%) and lived in urban areas (61.7%).The majority (72.4%) of the patients the 214 studied cases and the 102 lost-to-follow-up cases were not different in age, sex, and types of stroke (data not shown).Demographic data of the 214 patients were presented in

Table 2 :
Continuing treatment programs after discharge and places of treatments of stroke patients at 1-year after discharge ( = 202).
# Patients may receive treatments in more than one place.@ ROM: range of motion exercise.

Table 3 :
Severity of disability of stroke patients at various periods.
Data are the number of patients (percentage) and are compared using Chi-square tests.BI: Barthel Index.

Table 4 :
The association between severity of disability at discharge and month 12 ( = 196).

Table 5 :
Factors associated with the change in Barthel Index (BI) scores # .Change in BI: BI score at 1-year FU-BI score at DC. LOS: length of stay, OAI: onset to admission interval means time between stroke and being transferred from acute care to a rehabilitation unit.