Effects of gender on neurologic and functional recovery after spinal cord injury

OBJECTIVE: To assess gender differences in neurologic and functional outcome measures in persons with spinal cord injury (SCI). DESIGN: Case series. SETTINGS: Model Spinal Cord Injury Systems (MSCIS) throughout the United States. PARTICIPANTS: People (N=14,433) admitted to an MSCIS within 30 days of injury. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Improvement in American Spinal Injury Association (ASIA) motor index score, ASIA Impairment Scale, level of injury, and FIM instrument scores after SCI. RESULTS: When examining subjects grouped by severity of injury, changes in ASIA motor index total scores, from system admission to 1-year anniversary, were significantly greater for women than men with either complete ( P =.035) or incomplete ( P =.031) injuries. Functional comparison of men and women, using the FIM motor subscale, revealed that men had higher FIM motor scores at rehabilitation discharge among those with motor-complete injuries, except for those with C1-4 and C6 neurologic levels. Women with motor-incomplete high tetraplegia (C1-4 levels) had higher discharge FIM motor scores than did similarly afflicted men. There were no significant differences in FIM motor scores among men and women with other levels of motor incomplete SCI. CONCLUSIONS: Gender differences in SCI were seen in several areas. Women may have more natural neurologic recovery than men; however, for a given level and degree of neurologic injury, men tend to do better functionally than women at time of discharge from rehabilitation. Future prospective study of the effects of estrogen on neurologic recovery and the effects of gender on functional potential are recommended.     

Testosterone replacement therapy and motor function in men with spinal cord injury: a retrospective analysis

OBJECTIVE: To evaluate motor function in men with spinal cord injury (SCI) given testosterone replacement therapy (TRT). DESIGN: American Spinal Injury Association (ASIA) rehabilitation discharge motor index scores were compared between men with SCI given TRT (testosterone cypionate, 200 mg, monthly; n = 50) and a comparison group (n = 480) in a retrospective study. Covariates included admission motor and FIM scores, level of injury (paraplegia/tetraplegia), days since injury, and age. RESULTS: ASIA discharge motor scores for ASIA impairment scale grades C and D were significantly different (P < 0.05) in men with incomplete SCI given TRT, relative to the comparison group. The covariate-adjusted mean discharge score for the TRT group was higher than for the comparison group. There were no significant differences in discharge FIM scores (P = 0.34) for men with incomplete injuries and no differences in the adjusted discharge ASIA motor scores (P = 0.92) or adjusted discharge FIM scores (P = 0.16) for men with complete injuries. CONCLUSION: The data support a relationship between TRT and strength gains in men with residual motor function after SCI. Prospective studies are necessary to validate these findings.     

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.     

Early rehabilitation effect for traumatic spinal cord injury

OBJECTIVE: To determine the natural course of traumatic spinal cord injury (SCI) and the effect of early rehabilitation on it. DESIGN: A retrospective, multicenter study. SETTING: Sixteen Rosai hospitals and 1 medical school. PARTICIPANTS: One hundred twenty-three SCI patients (104 men, 19 women; mean age, 48.8 +/- 17.7yr) enrolled. INTERVENTIONS: Dividing the subjects into an early rehabilitation group and a delayed group; differences were ensured by international classification of SCI. MAIN OUTCOME MEASURES: Using the American Spinal Injury Association (ASIA) classifications, the motor recovery rate (MRR) was defined as (ASIA motor score at discharge - ASIA motor score at admission)/(100 - ASIA motor score at admission). The regression lines for FIM instrument score and ASIA motor score were determined for 6 subgroups (early or delayed tetraplegia, central cord injury, paraplegia) by the MRR staging. The regression lines for physical or cognitive FIM score and ASIA motor score were also determined for 6 subgroups. RESULTS: Three stages were obtained: acute stage: 2 weeks postinjury; recovery stage: 2 weeks to 6 months postinjury; and chronic stage: more than 6 months postinjury. Regression lines showed that rehabilitation improved physical functional independence for ASIA motor score, especially in the early rehabilitation subgroups. There was no correlation between cognitive FIM score and ASIA motor score in 6 subgroups. CONCLUSION: Early SCI rehabilitation contributes to good physical activities of daily living for motor function.     

A multicenter investigation of age-related differences in lengths of stay, hospitalization charges, and outcomes for a matched tetraplegia sample.

OBJECTIVE: To examine the effects of age at injury on lengths of stay, treatment costs, and outcomes using a matched sample of tetraplegic spinal cord injury (SCI) patients. DESIGN: Differences were examined by separating the sample into three age categories (18 to 34, 35 to 64, and 65+ years old) matched for American Spinal Injury Association (ASIA) Motor Impairment Classification and level of neurologic preservation bilaterally. Analysis of variance was used to examine age group differences for lengths of stay, medical expenses, and functional outcome. SETTING: Sixteen medical centers in the federally sponsored Spinal Cord Injury Model Systems Project. PARTICIPANTS: Three hundred seventy-five adult patients with tetraplegic SCI admitted between 1988 and 1996 were assessed at acute care admission, inpatient rehabilitation admission, and inpatient rehabilitation discharge. MAIN OUTCOME MEASURES: ASIA Motor Index and Functional Independence Measure (FIM) admission, discharge, and efficiency scores; acute care and rehabilitation lengths of stay and medical care charges; and discharge disposition. RESULTS: Analyses revealed equivalent lengths of stay and charges for all age groups. There were no age-related differences in ASIA and FIM Motor scores at acute care and inpatient rehabilitation admission. Younger patients' scores on the FIM Motor subscale improved significantly more than did middle and older patients'. The two younger groups of patients had a more significant improvement than did older patients, as indicated by ASIA Motor Index scores. When taking lengths of stay into account, the FIM motor scores of the youngest group of patients improved more quickly than those of the two older groups. Furthermore, the younger and middle age groups demonstrated greater treatment efficiency than the older patient group based on ASIA Motor Index score ratios. Younger patients were least likely to be discharged to institutional settings. CONCLUSIONS: Along with neurologic and functional status, age should be considered when formulating treatment plans and prognostic statements. For older patients, alternative rehabilitation settings with lower-intensity treatment and lower charges may prove to be a more efficacious use of resources.     

美国脊髓损伤协会损伤分级与脊髓运动损伤程度的相关性研究

目的:探讨和比较美国脊髓损伤协会(ASIA)损伤分级与脊髓运动损伤程度的关系。方法:对43例脊髓损伤患者分别进行ASIA损伤分级、按肢体运动功能分级和ASIA运动评分,比较分级结果,并对ASIA损伤分级、按肢体运动功能分级和ASIA运动评分间的关系作等级相关分析。结果:ASIA-A级(完全性脊髓损伤)患者的按肢体运动功能分级存在差异。ASIA损伤分级与按肢体运动功能分级及ASIA运动评分的等级相关系数为0.578—0.809(P<0.01),而按肢体运动功能分级与ASIA运动评分的等级相关系数为0.970—0.999(P<0.01),相关程度存在差异。结论:ASIA损伤分级不能够完全反映脊髓运动损伤水平。     

Outcomes of early surgical management versus late or no surgical intervention after acute spinal cord injury

OBJECTIVE: To compare neurologic, medical, and functional outcomes of patients with acute spinal cord injury (SCI) undergoing early (<24 h and 24-72 h) and late (>72 h) surgical spine intervention versus those treated nonsurgically. DESIGN: Retrospective case series comparing outcomes by surgical and nonsurgical groups during acute care, rehabilitation, and at 1-year follow-up. SETTING: Multicenter National Spinal Cord Injury Database. PARTICIPANTS: Consecutive patients with acute, nonpenetrating, traumatic SCI from 1995 to 2000, admitted in the first 24 hours after injury. Surgical spinal intervention was likely secondary to nature of injury and the need for spinal stabilization. Interventions Not applicable. MAIN OUTCOME MEASURES: Changes in neurologic outcomes (motor and sensory levels, motor index score, American Spinal Injury Association [ASIA] Impairment Scale [AIS]), medical complications (pneumonia and atelectasis, deep vein thrombosis and pulmonary embolism, pressure ulcers, autonomic dysreflexia, rehospitalization), and functional outcomes (acute and rehabilitation length of stay [LOS], hospital charges, FIM instrument score, FIM motor efficiency scores). RESULTS: Subjects in the early surgery group were more likely ( P <.05) to be women, have paraplegia, and have SCI caused by motor vehicle collisions. The nonsurgical group was more likely ( P <.05) to have an older mean age and more incomplete injuries. ASIA motor index improvements (from admission to 1-y follow-up) were more likely ( P <.05) in the nonsurgical groups, as compared with the surgical groups. Those with late surgery had significantly ( P <.05) increased acute care and total LOS and hospital charges along with higher incidence of pneumonia and atelectasis. No differences between groups were found for changes in neurologic levels, AIS grade, or FIM motor efficiency. CONCLUSIONS: ASIA motor index improvements were noted in the nonsurgery group, though likely related to increased incompleteness of injuries within this group. Early versus late spinal surgery was associated with shorter LOS and reduced pulmonary complications, however, no differences in neurologic or functional improvements were noted between early or late surgical groups.     

Etiology and incidence of rehospitalization after traumatic spinal cord injury: a multicenter analysis

OBJECTIVES: To examine the frequency and reasons for rehospitalization in persons with acute traumatic spinal cord injury (SCI) during follow-up years and to examine the association between rehospitalization and demographics, neurologic category, payer sources, length of stay (LOS), discharge motor FIM instrument score, and discharge residence. DESIGN: Survey design with analysis of cross-sectional data. SETTING: Model Spinal Cord Injury Systems (MSCIS) centers. PARTICIPANTS: Data for 8668 persons with SCI from 16 MSCIS centers entered in the National Spinal Cord Injury Statistical Center database between 1995 and 2002. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: MSCIS Forms I and II were used to identify the annual incidence, medical complications, and etiologies of rehospitalizations reported at 1-, 5-, 10-, 15-, and 20-year follow-ups. RESULTS: The leading cause of rehospitalization was diseases of the genitourinary system, including urinary tract infections (UTIs). Diseases of the respiratory system tended to be more likely in patients with tetraplegia (C1-8 American Spinal Injury Association [ASIA] grades A, B, C); whereas patients with paraplegia (T1-S5 ASIA grades A, B, C) were more likely to be rehospitalized for pressure ulcers. The rate of rehospitalization was significantly higher at year 1, 5, and 20 for those who were discharged to a skilled nursing facility after acute rehabilitation. Lower motor score using the FIM was predictive of rehospitalization (P=.000). The average LOS per rehospitalization at the year-5 follow-up was approximately 12 days, which is lower than in past MSCIS reports. CONCLUSIONS: Despite improvements in SCI medical management, rehospitalization rates remain high, with an increased incidence in conditions associated with the genitourinary system (including UTIs), respiratory complications (including pneumonia), and diseases of the skin (including pressure ulcers). Acutely injured patients need close follow-up to reduce morbidity and rehospitalizations.     

Neurologic recovery after traumatic spinal cord injury: data from the Model Spinal Cord Injury Systems

OBJECTIVE: To present data on neurologic recovery gathered by the Model Spinal Cord Injury (SCI) Systems over a 10-year period. DESIGN: Case series. SETTING: Twenty-one Model SCI Systems. PATIENTS: A total of 3,585 individuals with traumatic SCI admitted between January 1, 1988 and December 31, 1997. MAIN OUTCOME MEASURES: Neurologic impairment category; Frankel grade; American Spinal Injury Association (ASIA) Impairment Scale (AIS) grade; motor score. RESULTS: SCI caused by violence is more likely than SCI from nonviolent etiologies to result in a complete injury. Changes in severity of injury were similar using the older Frankel scale and the newer ASIA Impairment Scale. Individuals who were motor-complete with extended zones of sensory preservation but without sacral sparing were less likely to convert to motor-incomplete status than those with sacral sparing (13.3% vs 53.6%; p < .001). Motor score improvements at 1 year were related to severity of injury, with greater increases for better AIS grades except grade D, because of ceiling effects. Individuals with AIS grade B injuries have a mixed prognosis. CONCLUSION: Neurologic recovery after SCI is influenced by etiology and severity of injury. Multicenter studies on prognostic features such as preserved pin sensation in grade B injuries may identify subgroups with similar recovery patterns. Identification of such groups would facilitate clinical trials for neurologic recovery in acute SCI.     

Neoplastic versus traumatic spinal cord injury: an outcome comparison after inpatient rehabilitation.

OBJECTIVE: To compare outcomes of patients with neoplastic spinal cord compression (SCC) to outcomes of patients with traumatic spinal cord injury (SCI) after inpatient rehabilitation. DESIGN: A comparison between patients with a diagnosis of neoplastic SCC admitted to an SCI rehabilitation unit and patients with a diagnosis of traumatic SCI admitted to the regional Model Spinal Cord Injury Centers over a 5-year period, controlling for age, neurologic level of injury, and American Spinal Injury Association impairment classification. SETTING: Tertiary university medical centers. PATIENTS: Twenty-nine patients with neoplastic SCC and 29 patients with SCI of traumatic etiology who met standard rehabilitation admission criteria. MAIN OUTCOME MEASURES: Acute and rehabilitation hospital length of stay (LOS), Functional Independence Measure (FIM) scores, FIM change, FIM efficiency, and discharge rates to home. RESULTS: Patients with neoplastic SCC had a significantly (p < .01) shorter rehabilitation LOS than those with traumatic SCI (25.17 vs 57.46 days). No statistical significance was found in acute care LOS. Motor FIM scores on admission were higher in the neoplastic group, but discharge FIM scores and FIM change were significantly lower. Both groups had similar FIM efficiencies and community discharges. CONCLUSIONS: Patients with neoplastic SCC can achieve rates of functional gain comparable to those of their counterparts with traumatic SCI. While patients with traumatic SCI achieve greater functional improvement, patients with neoplastic SCC have a shorter rehabilitation LOS and can achieve comparable success with discharge to the community.     

Sex-related differences of rehabilitation outcomes of spinal cord lesion patients

OBJECTIVES: To evaluate sex-related differences of spinal cord lesion patients. PATIENTS: Two hundred and eighty-one patients were included with evaluation of: lesion to admission time, aetiology, lesion level, associated injury, medical complications and surgical intervention, length of stay, American Spinal Injury Association (ASIA) impairment and motor scores. MAIN OUTCOME MEASURES: ASIA impairment grade and ASIA motor scores; Barthel Index, Rivermead Mobility Index and Walking Index for Spinal Cord Injury. RESULTS: In the entire group female patients had a lower frequency of traumatic lesions, a lower frequency of complications at admission and a higher frequency of incomplete lesions (ASIA impairment C). In the matching cohorts comparison female patients showed the same neurological and functional recovery as male patients. CONCLUSION: Gender does not seems to influence spinal cord rehabilitation outcomes despite the fact that men and women showed significant epidemiological differences. Further studies are needed to evaluate some aspects such as long-term bladder management and complications.     

A Concordance Table to Convert FIM Basic Mobility and Self-Care Scale Scores to SCI-FI/AT Scores

ObjectiveTo estimate Spinal Cord Injury Functional Index Assistive Technology (SCI-FI/AT) scores from FIM motor items.DesignSecondary data analysis.SettingFourteen Spinal Cord Injury Model Systems (SCIMS) programs.ParticipantsPersons with traumatic spinal cord injury (SCI) discharged from inpatient rehabilitation at 14 SCIMS programs (N=1237).InterventionsNot applicable.Main Outcome MeasuresFIM motor items were matched to SCI-FI/AT domains and summary scores for each measure were developed. The kernel-based method was employed to develop a concordance table to estimate SCI-FI/AT domain summary scores from content-matched FIM motor item summary scores. We conducted analyses to compare agreement between actual SCI-FI/AT summary scores (actual SCI-FI/AT_S) and estimated SCI-FI/AT summary scores (est-SCI-FI/AT_S) for the total sample and for participants with different SCI injury categories.ResultsNine FIM items matched SCI-FI/AT basic mobility and self-care domain content. Pearson correlations for actual and est-SCI-FI/AT_S scores (0.79) were adequate for using concordance linking methods. Intraclass correlation coefficient values (0.79; 95% confidence interval, 0.77-0.81) indicated moderate reliability. t tests revealed no significant differences between actual and est-SCI-FI/AT_S scores in the total sample. For almost 60% of the sample, actual and est-SCI-FI/AT_S score differences were <5 points (half of a SD). Greater differences between actual and est-SCI-FI/AT_S scores were noted for persons with tetraplegia American Spinal Injury Association Impairment Scales (AISs) A, B, and C.ConclusionsDespite differences between the FIM and SCI-FI/AT assessments, we developed a concordance table to estimate self-care and basic mobility SCI-FI/AT scores from content-matched FIM motor item scores. This concordance table allows researchers to merge FIM data with SCI-FI/AT data to analyze SCI functional outcomes at the group level. However, owing to greater differences between actual and estimated scores, the concordance table should be used with caution to interpret scores for those with cervical-level injuries AISs A, B, C.     

Poster 17: Is length of stay associated with spinal cord injury functional outcome at discharge from acute rehabilitation?

Objective: To determine whether rehabilitation length of stay (LOS) is associated with discharge motor function for persons with spinal cord injury (SCI). Design: Longitudinal. Setting: Spinal Cord Injury Model Systems center. Participants: 920 persons with traumatic, complete SCI enrolled in the Spinal Cord Injury National Database, with levels of injury (LOI) at C5, C6, C7, and T1-5; and inpatient rehabilitation discharge dates between 1989 and 1992 (“early”) and 1999 and 2002 (“late”). Interventions: Not applicable. Main Outcome Measures: FIM™ instrument at rehabilitation discharge. Results: For all LOI groups, the late group had a LOS shorter than the early group, with the largest difference in the C7 group: 107 days (early) versus 59 days (late). FIM motor scores at rehabilitation discharge also differed significantly for the C5, C7, and T1-5 LOI groups. For each of these LOIs, the late group was discharged with lower FIM motor scores; the largest difference was again noted for the C7 group, which had FIM motor scores of 51.9 (early) versus 40.7 (late). Conclusions: Decreased inpatient rehabilitation LOS was associated with decreased function at rehabilitation discharge. Persons with C7-level SCI were the most affected group; this group had the largest decrease in LOS and motor FIM score.     

影响脊髓损伤患者出院时日常生活活动能力的相关因素分析

目的 探讨影响脊髓损伤(SCI)患者出院时日常生活活动(ADL)能力的相关因素.方法 对105例SCI患者进行分析,入选时收集每位患者病史,记录一般情况如性别、年龄、病因、损伤水平、损伤分级、受伤(发病)时间、手术时间、入院和出院时间等,并记录出院和入院时的改良Barthel指数(MBI)评分、美国脊髓损伤协会(ASIA)SCI积分,对影响患者出院时ADL能力的因素进行线性回归分析.结果 出院时,SCI患者ASIA运动评分、ASIA针刺觉评分、ASIA轻触觉评分和MBI评分均有改善,与入院时比较,差异有统计学意义(P＜0.01);多因素分析显示,SCI分级、入院时ASIA运动评分、入院时ASIA针刺觉评分等3个因素与出院时MBI评分密切相关,康复介入时间、康复疗程、入院时ASIA运动评分等3个因素与出入院MBI差值密切相关.结论 通过康复训练,各年龄阶段、不同损伤平面、不同损伤程度的SCI患者的ADL能力都可得到改善.入院时运动能力较好、康复疗程足够长、康复介入时间早的患者改善幅度也相对较大.     

影响脊髓损伤患者出院时日常生活活动能力的相关因素分析

目的 探讨影响脊髓损伤(SCI)患者出院时日常生活活动(ADL)能力的相关因素.方法 对105例SCI患者进行分析,入选时收集每位患者病史,记录一般情况如性别、年龄、病因、损伤水平、损伤分级、受伤(发病)时间、手术时间、入院和出院时间等,并记录出院和入院时的改良Barthel指数(MBI)评分、美国脊髓损伤协会(ASIA)SCI积分,对影响患者出院时ADL能力的因素进行线性回归分析.结果 出院时,SCI患者ASIA运动评分、ASIA针刺觉评分、ASIA轻触觉评分和MBI评分均有改善,与入院时比较,差异有统计学意义(P＜0.01);多因素分析显示,SCI分级、入院时ASIA运动评分、入院时ASIA针刺觉评分等3个因素与出院时MBI评分密切相关,康复介入时间、康复疗程、入院时ASIA运动评分等3个因素与出入院MBI差值密切相关.结论 通过康复训练,各年龄阶段、不同损伤平面、不同损伤程度的SCI患者的ADL能力都可得到改善.入院时运动能力较好、康复疗程足够长、康复介入时间早的患者改善幅度也相对较大.     

Late neurologic recovery after traumatic spinal cord injury

OBJECTIVE: To present Model Spinal Cord Injury System (MSCIS) data on late neurologic recovery after 1 year after spinal cord injury (SCI). DESIGN: Longitudinal study of neurologic status as determined by annual evaluations at 1 and 5 years postinjury. SETTING: MSCIS centers contributing data on people with traumatic SCI to the National Spinal Cord Injury Statistical Center database. PARTICIPANTS: People with traumatic SCI (N=987) admitted to an MSCIS between 1988 and 1997 with 1- and 5-year follow-up examinations. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: American Spinal Injury Association (ASIA) Impairment Scale (AIS) classification, motor index scores (MIS), motor level, and neurologic level of injury (NLI), measured and compared for changes over time. RESULTS: The majority of subjects (94.4%) who had a neurologically complete injury at 1 year remained complete at 5 years postinjury, with 3.5% improving to AIS grade B, and up to 1.05% each improving to AIS grades C and D. There was a statistically significant change noted for MIS. There were no significant changes for the motor level and NLI over 4 years; however, approximately 20% of subjects improved their motor level and NLI. People with complete and incomplete injuries had similar improvements in motor level, but subjects with an incomplete injury had a greater chance of improvement in NLI and MIS. CONCLUSIONS: There was a small degree of neurologic recovery (between 1 and 5 y postinjury) after a traumatic SCI. Late conversion, between 1 and 5 years, from a neurologically complete to an incomplete injury occurred in 5.6% of cases, but in only up to 2.1% was there a conversion from motor complete to motor incomplete status. Limitations of this study included changes in the ASIA classification during the study and in the intra- and interrater reliability typically seen in longitudinal studies of the ASIA standards. Functional changes were not studied. Knowledge of the degree of late recovery may help in analyzing newer interventions to enhance recovery.     

Effectiveness of automated locomotor training in patients with chronic incomplete spinal cord injury: a multicenter trial

OBJECTIVE: To determine whether automated locomotor training with a driven-gait orthosis (DGO) can increase functional mobility in people with chronic, motor incomplete spinal cord injury (SCI). DESIGN: Repeated assessment of the same patients or single-case experimental A-B design. SETTING: Research units of rehabilitation hospitals in Chicago; Heidelberg, Germany; and Basel and Zurich, Switzerland. PARTICIPANTS: Twenty patients with a chronic (>2 y postinjury), motor incomplete SCI, classified by the American Spinal Injury Association (ASIA) Impairment Scale with ASIA grades C (n=9) and D (n=11) injury. Most patients (n=16) were ambulatory before locomotor training. INTERVENTION: Locomotor training was provided using robotic-assisted, body-weight-supported treadmill training 3 to 5 times a week over 8 weeks. Single training sessions lasted up to 45 minutes of total walking time, with gait speed between .42 and .69 m/s and body-weight unloading as low as possible (mean +/- standard deviation, 37%+/-17%). MAIN OUTCOME MEASURES: Primary outcome measures included the 10-meter walk test, the 6-minute walk test, the Timed Up & Go test, and the Walking Index for Spinal Cord Injury-II tests. Secondary measures included lower-extremity motor scores and spastic motor behaviors to assess their potential contribution to changes in locomotor function. All subjects were tested before, during, and after training. RESULTS: Locomotor training using the DGO resulted in significant improvements in the subjects' gait velocity, endurance, and performance of functional tasks. There were no significant changes in the requirement of walking aids, orthoses, or external physical assistance. There was no correlation between improvements in walking speed or changes in muscle strength or spastic motor behaviors. CONCLUSIONS: Intensive locomotor training on a treadmill with the assistance of a DGO results in improved overground walking.