Self-reported Walking Ability Research Articles

Long-term results of surgery for lumbar spinal stenosis: a randomised controlled trial

We randomised a total of 94 patients with long-standing moderate lumbar spinal stenosis (LSS) into a surgical group and a non-operative group, with 50 and 44 patients, respectively. The operative treatment comprised undercutting laminectomy of stenotic segments, augmented with transpedicular-instrumented fusion in suspected lumbar instability. The primary outcome was the Oswestry disability index (ODI), and the other main outcomes included assessments of leg and back pain and self-reported walking ability, all based on questionnaire data from 85 patients at the 6-year follow-up. At the 6-year follow-up, the mean difference in ODI in favour of surgery was 9.5 (95% confidence interval 0.9-18.1, P-value for global difference 0.006), whereas the intensity of leg or back pain did not differ between the two treatment groups any longer. Walking ability did not differ between the treatment groups at any time. Decompressive surgery of LSS provided modest but consistent improvement in functional ability, surpassing that obtained after non-operative measures.

Depressive symptoms during rehabilitation period predict poor outcome of lumbar spinal stenosis surgery: A two-year perspective

BackgroundPrevious research has shown an association between preoperative depressive symptoms and a poorer surgery outcome in lumbar spinal stenosis (LSS). It is not known whether depressive symptoms throughout the recovery period are relevant to the outcome of surgery in LSS. In this prospective clinical study the predictive value of preoperative and postoperative depressive symptoms with respect to the surgery outcome is reported.Methods96 patients (mean age 62 years) with symptomatic lumbar spinal stenosis underwent decompressive surgery. They completed the same set of questionnaires preoperatively and 3 months, 6 months, 1 year and 2 years postoperatively. Depressive symptoms were assessed with the 21-item Beck Depression Inventory. Physical functioning and pain were assessed with the Oswestry Disability Index, the Stucki Questionnaire, self-reported walking ability and VAS rating. Logistic regression analyses were used to examine the predictive value of preoperative and postoperative depressive symptoms regarding the surgery outcome. A "good" outcome was defined in two ways: first, by gaining a 30% improvement in relation to the preoperative disability and pain, and second, by having a score at or below the median value for disability and pain on 2-year follow-up.ResultsHaving elevated depressive symptoms particularly on 3-month follow-up was predictive of a poorer surgery outcome regarding pain and disability: when the outcome was defined as less than 30% improvement from the baseline, the OR's (with 95% confidence intervals) were 2.94 (1.06-8.12), <0.05 for Oswestry and 3.33 (1.13-9.79), <0.05 for VAS. In median split approach the OR was 4.11 (1.27-13.32), <0.05 for Oswestry. Predictive associations also emerged between having depressive symptoms on 6-month and 1-year follow-ups and a poorer outcome regarding disability. The predictive value of elevated depressive symptoms particularly with respect to 2-yeard disability was evident whether the outcome was defined as a 30% improvement compared to the preoperative status or as belonging to the better scoring half of the study population on 2-year follow-up.ConclusionsPreoperative and postoperative depressive symptoms may indicate those patients at greater risk of a poorer postoperative functional ability. For these patients, further clinical evaluation should be carried out, especially during postoperative stages.

Coexistence of pain and depression predicts poor 2-year surgery outcome among lumbar spinal stenosis patients

Background: Lumbar spinal stenosis is a common cause of back and leg pain with the most severe cases treated surgically. Regarding the surgery outcome, the importance of early postoperative depression and pain is unknown. Aims: To examine whether the coexistence of pain and depressive symptoms on 3-month follow-up predicts the 2-year surgery outcome. Methods: 93 patients (mean age 62 years) with symptomatic lumbar spinal stenosis underwent decompressive surgery. They completed the same set of questionnaires, 3 months, 1 year and 2 years postoperatively. Depression was assessed with the 21-item Beck Depression Inventory (BDI). Physical functioning and pain were assessed with the Oswestry Disability Index, the Stucki Questionnaire, self-reported walking ability, the visual analogue scale (VAS) and pain drawing. Comparisons were made between groups according to the “misery” (i.e. the coexistence of elevated pain and depression on 3-month follow-up) status. Logistic regression analysis was used to examine the factors independently associated with a poor surgery outcome on 2-year follow-up. Results: The patients in the misery group (n=24) showed greater symptom severity and greater disability than the patients in the non-misery group (n=69) at all follow-up stages. No clinical improvement was seen in the misery group during the follow-up. An independent association was observed between belonging to the misery group and 2-year disability, symptom severity and poor walking capacity. Conclusions. Even moderately increased VAS and BDI scores, when presenting simultaneously on an individual patient level during the early postoperative period, imply a strong clinical burden and a risk factor for poor recovery. The assessment of pain and depressive symptoms is encouraged.

Meaningful change in measures of gait variability in older adults

Objectives Gait variability is an important indicator of impaired mobility in older adults; however, little is known about the meaning of change in gait variability over time. This study estimated clinically meaningful change in measures of gait variability using both distribution- and anchor-based approaches. Design Community-based observational cohort study. Setting Bronx County and the research center at Albert Einstein College of Medicine. Participants Of 1148 participants in the Einstein Aging Study, 241 had quantitative gait assessments in two consecutive years between 2001 and 2005. Measurements Gait variables were collected using a 12-foot instrumented walkway as participants walked at their normal walking speed. Gait variability was defined as the within-person standard deviation (SD) across steps in two 12-foot walks. Distribution-based meaningful change estimates used Cohen's effect size (0.2 for small and 0.5 for moderate effects). Anchor-based estimates were obtained using dichotomous and ordinal self-reported walking ability ratings as anchors. Results Distribution-based estimates for small and substantial changes of variability measures were: stance time 0.005 and 0.014 s; swing time 0.003 and 0.009 s; step length 0.24 and 0.61 cm; and step width 0.03 and 0.08 cm. Among those reporting no change in walking ability, measures of gait variability were stable over 1 year. Among those reporting a decline in walking, stance time and swing time variability increased. Among those reporting an improvement in walking, only step length variability improved. Conclusion Preliminary criteria for meaningful change are 0.01 s for stance time and swing time variability and 0.25 cm for step length variability. These estimates may identify important changes over time in both clinical settings and research studies.

Depressive Burden in the Preoperative and Early Recovery Phase Predicts Poorer Surgery Outcome Among Lumbar Spinal Stenosis Patients

Prospective clinical study. (1) To determine the prevalence of depression at the 1-year postoperative stage among spinal stenosis patients. (2) To assess the predictive value of preoperative and 3-month depressive symptoms regarding the 1-year surgery outcome. Some studies have found preoperative depressive symptoms to be associated with a poorer spinal stenosis surgery outcome. However, only the effect of preoperative depressiveness has been evaluated. The prevalence of depressiveness on 1-year follow-up among spinal stenosis patients is unclear. One hundred two patients (mean age, 62 years) with symptomatic lumbar spinal stenosis underwent decompressive surgery. They completed the same set of questionnaires before surgery, 3 months, and 1 year after surgery. Depression was assessed with the 21-item Beck Depression Inventory. Physical functioning and pain were assessed with the Oswestry Disability Index, the Stucki Questionnaire, self-reported walking ability, the visual analogue scale and pain drawing. Logistic regression was used to examine the preoperative factors associated with a poorer surgery outcome on 1-year follow-up. In further analysis, a depressive burden variable (sum of preoperative and 3-month Beck Depression Inventory scores) was included as a predictor. Eighteen percent of spinal stenosis patients were depressed on 1-year follow-up. Higher preoperative Beck Depression Inventory scores and depressive burden scores burden were independently associated with a poorer self-reported functional ability, symptom severity and a poorer walking capacity on 1-year follow-up. As a dichotomous predictor, a high depressive burden was independently associated with all the postoperative outcome variables at the 1-year stage: greater disability, pain and symptom severity, and a poorer walking capacity. The prevalence of depression was notable among 1-year postoperative spinal stenosis patients. Depressive symptoms in the preoperative and early recovery phase were strong predictors of a poorer self-reported surgery outcome on 1-year follow-up. The results call for intervention strategies to detect and treat depression during both the preoperative and postoperative phase.

Evaluation of single event multilevel surgery and rehabilitation in children and youth with cerebral palsy – A 2-year follow-up study

Purpose. This study evaluated multilevel surgery and rehabilitation with functional measures and health related quality of life (HRQOL) of children and youth with cerebral palsy (CP). In addition this study evaluated parent's satisfaction with care.Method. A prospective single-subject study with AB design and 2-year follow-up, included 11 children between 8 and 18 years old with CP, Gross Motor Function Classification System I–III. Visual analyses were used to present physical function with Physical Cost Index (PCI). Descriptive statistics were used to present number of children with a clinically important change in Gross Motor Function Measure (GMFM), self-reported walking ability, and HRQOL with child health questionnaire (CHQ).Results. PCI showed a trend of lower energy cost during gait in six children and GMFM was unchanged for 10 children and improved for one child. Walking ability was improved in 10 children. Gait distance increased in all 11. Both physical and psychosocial dimensions of CHQ improved in six of nine (two missing data). Expectations of outcomes were fulfilled in seven and partly fulfilled in four. Satisfaction with care was fulfilled in 10 of 11.Conclusion. Self-reported walking ability improved after multilevel surgery and intensive rehabilitation. This result was partly supported by lower energy cost and improved HRQOL. Expectations and satisfaction were fulfilled for the majority of children.

Life dissatisfaction is associated with a poorer surgery outcome and depression among lumbar spinal stenosis patients: a 2-year prospective study

The aim of this study was to examine the life satisfaction of lumbar spinal stenosis (LSS) patients up to the 2-year postoperative phase. Patients (N = 102, mean age, 62 years) with symptomatic LSS underwent decompressive surgery. Data collection took place with the same set of questionnaires before surgery and 3 months, 6 months, 1 year and 2 years postoperatively. Life satisfaction was assessed with the four-item Life Satisfaction scale and depression symptoms with the 21-item Beck Depression Inventory (BDI). In addition, a depression burden variable was included, comprising the sum of preoperative, 3- and 6-month BDI scores. Physical functioning and pain were assessed with the Oswestry disability index, Stucki questionnaire, self-reported walking ability, visual analogy scale and pain drawing. Two years postoperatively, 18% of the LSS patients was dissatisfied with their lives. As a whole, the life satisfaction of the LSS patients improved during the postoperative follow-up, reaching the level of the healthy adult Finnish population. However, 2 years postoperatively, dissatisfied patients reported significantly more pain, a poorer functional ability and more depressive symptoms and depression than the patients who were satisfied with life. This difference was seen throughout the postoperative follow up. In regression analyses, the only significant associations were between the depression burden and postoperative life dissatisfaction. Thus, subjective well-being as well as depression among LSS patients should be assessed pre- and postoperatively in order to enable early intervention for those at risk of poorer life satisfaction.

Depression is associated with poorer outcome of lumbar spinal stenosis surgery

The objective of this observational prospective study was to investigate the effect of depression on short-term outcome after lumbar spinal stenosis (LSS) surgery. Surgery was performed on 99 patients with clinically and radiologically defined LSS, representing ordinary LSS patients treated at the secondary care level. They completed questionnaires before surgery and 3 months postoperatively. Depression was assessed with the 21-item Beck Depression Inventory (BDI). Physical functioning and pain were assessed with Oswestry disability index, Stucki Questionnaire, self-reported walking ability, visual analogue scale (VAS) and pain drawing. Preoperatively, 20% of the patients had depression. In logistic regression analyses, significant associations were seen between preoperative depression and postoperative high Oswestry disability and Stucki severity scores and high intensity of pain (VAS score). In subsequent analyses, the patients with continuous depression, measured with BDI (60% of the patients who had preoperative depression), showed fewer improvements in symptom severity, disability score, pain intensity and walking capacity than the patients who did not experience depression at any phase. In those patients who recovered from depression, according to BDI-scores (35% of the patients with preoperative depression), the postoperative improvement was rather similar to the improvement seen in the normal mood group. In the surgical treatment of LSS, we recommend that the clinical practice should include an assessment of depression.

Self-reported walking ability predicts functional mobility performance in frail older adults.

To determine how self-reported physical function relates to performance in each of three mobility domains: walking, stance maintenance, and rising from chairs. Cross-sectional analysis of older adults. University-based laboratory and community-based congregate housing facilities. Two hundred twenty-one older adults (mean age, 79.9 years; range, 60-102 years) without clinical evidence of dementia (mean Folstein Mini-Mental State score, 28; range, 24-30). We compared the responses of these older adults on a questionnaire battery used by the Established Populations for the Epidemiologic Study of the Elderly (EPESE) project, to performance on mobility tasks of graded difficulty. Responses to the EPESE battery included: (1) whether assistance was required to perform seven Katz activities of daily living (ADL) items, specifically with walking and transferring; (2) three Rosow-Breslau items, including the ability to walk up stairs and walk a half mile; and (3) five Nagi items, including difficulty stooping, reaching, and lifting objects. The performance measures included the ability to perform, and time taken to perform, tasks in three summary score domains: (1) walking ("Walking," seven tasks, including walking with an assistive device, turning, stair climbing, tandem walking); (2) stance maintenance ("Stance," six tasks, including unipedal, bipedal, tandem, and maximum lean); and (3) chair rise ("Chair Rise," six tasks, including rising from a variety of seat heights with and without the use of hands for assistance). A total score combines scores in each Walking, Stance, and Chair Rise domain. We also analyzed how cognitive/ behavioral factors such as depression and self-efficacy related to the residuals from the self-report and performance-based ANOVA models. Rosow-Breslau items have the strongest relationship with the three performance domains, Walking, Stance, and Chair Rise (eta-squared ranging from 0.21 to 0.44). These three performance domains are as strongly related to one Katz ADL item, walking (eta-squared ranging from 0.15 to 0.33) as all of the Katz ADL items combined (eta-squared ranging from 0.21 to 0.35). Tests of problem solving and psychomotor speed, the Trails A and Trails B tests, are significantly correlated with the residuals from the self-report and performance-based ANOVA models. Compared with the rest of the EPESE self-report items, self-report items related to walking (such as Katz walking and Rosow-Breslau items) are better predictors of functional mobility performance on tasks involving walking, stance maintenance, and rising from chairs. Compared with other self-report items, self-reported walking ability may be the best predictor of overall functional mobility.

Functional Benefits of Peripheral Vascular Bypass Surgery for Patients with Intermittent Claudication

Many patients with peripheral arterial disease (PAD) undergo peripheral bypass surgery to relieve the symptom of intermittent claudication. However, measurement of graft patency alone, assessed by change in ankle blood pres sure, may not adequately reflect the improvement in functional status following the operation. Fourteen patients with moderately severe intermittent claudica tion were evaluated before and after bypass surgery to assess changes in hemo dynamics (by resting ankle-brachial indices-ABIs), exercise performance (by a graded treadmill protocol), and community-based walking ability (by a ques tionnaire that characterizes self-reported walking speed and distance). Six weeks after surgery, resting ABIs improved in surgical patients (from 0.56 ± 0.09 to 0.93 ± 0.16, P &lt; 0.05). Peak treadmill walking time improved from 6.2 ± 5.9 to 11.8 ± 7.1 min (90%), peak oxygen consumption from 15.5 ± 6.5 to 19.1 ± 8.5 mL/kg/min (23%), and pain-free walking time from 1.5 ± 0.4 to 6.0 5.5 min (290%). Questionnaire scores for walking distance improved by 203% and for walking speed by 130% (all P &lt; 0.05). After twelve weeks, improve ments other than pain-free walking time were maintained. Changes in peak treadmill performance or questionnaire scores were not correlated with the ini tial ABI, changes in ABI six or twelve weeks after surgery, or the type or extent of bypass surgery. The results demonstrate that surgical treatment of PAD, indi cated for the relief of intermittent claudication, improves exercise performance and self-reported community-based walking ability. The change in functional status of the patient is an important outcome of surgery that cannot be pre dicted from routine noninvasive testing alone and should be measured directly.

Functional Benefits of Peripheral Vascular Bypass Surgery for Patients with Intermittent Claudication

Many patients with peripheral arterial disease (PAD) undergo peripheral bypass surgery to relieve the symptom of intermittent claudication. However, measurement of graft patency alone, assessed by change in ankle blood pressure, may not adequately reflect the improvement in functional status following the operation. Fourteen patients with moderately severe intermittent claudication were evaluated before and after bypass surgery to assess changes in hemodynamics (by resting ankle-brachial indices-ABIs), exercise performance (by a graded treadmill protocol), and community-based walking ability (by a questionnaire that characterizes self-reported walking speed and distance). Six weeks after surgery, resting ABIs improved in surgical patients (from 0.56 ± 0.09 to 0.93 ± 0.16, P &lt; 0.05). Peak treadmill walking time improved from 6.2 ± 5.9 to 11.8 ± 7.1 min (90%), peak oxygen consumption from 15.5 ± 6.5 to 19.1 ± 8.5 mL/kg/min (23%), and pain-free walking time from 1.5 ± 0.4 to 6.0 5.5 min (290%). Questionnaire scores for walking distance improved by 203% and for walking speed by 130% (all P &lt; 0.05). After twelve weeks, improvements other than pain-free walking time were maintained. Changes in peak treadmill performance or questionnaire scores were not correlated with the initial ABI, changes in ABI six or twelve weeks after surgery, or the type or extent of bypass surgery. The results demonstrate that surgical treatment of PAD, indicated for the relief of intermittent claudication, improves exercise performance and self-reported community-based walking ability. The change in functional status of the patient is an important outcome of surgery that cannot be predicted from routine noninvasive testing alone and should be measured directly.

Functional benefits of peripheral vascular bypass surgery for patients with intermittent claudication.

Many patients with peripheral arterial disease (PAD) undergo peripheral bypass surgery to relieve the symptom of intermittent claudication. However, measurement of graft patency alone, assessed by change in ankle blood pressure, may not adequately reflect the improvement in functional status following the operation. Fourteen patients with moderately severe intermittent claudication were evaluated before and after bypass surgery to asses changes in hemodynamics (by resting ankle-brachial indices-ABIs), exercise performance (by a graded treadmill protocol), and community-based walking ability (by a questionnaire that characterizes self-reported walking speed and distance). Six weeks after surgery, resting ABIs improved in surgical patients (from 0.56 +/- 0.09 to 0.93 +/- 0.16, P < 0.05). Peak treadmill walking time improved from 6.2 +/- 5.9 to 11.8 +/- 7.1 min (90%), peak oxygen consumption from 15.5 +/- 6.5 to 19.1 +/- 8.5 mL/kg/min (23%), and pain-free walking time from 1.5 +/- 0.4 to 6.0 5.5 min (290%). Questionnaire scores for walking distance improved by 203% and for walking speed by 130% (all P < 0.05). After twelve weeks, improvements other than pain-free walking time were maintained. Changes in peak treadmill performance or questionnaire scores were not correlated with the initial ABI, changes in ABI six or twelve weeks after surgery, or the type or extent of bypass surgery. The results demonstrate that surgical treatment of PAD, indicated for the relief of intermittent claudication, improves exercise performance and self-reported community-based walking ability. The change in functional status of the patient is an important outcome of surgery that cannot be predicted from routine noninvasive testing alone and should be measured directly.