The Persian version of locomotor capabilities index: translation, reliability and validity in individuals with lower limb amputation.
OBJECTIVE
To translate the Locomotor Capabilities Index (LCI-5) to Persian and to assess its psychometric properties when applied to a sample of people with lower limb amputation (LLA).


METHODS
The LCI-5 was administered to 106 Persian speaking people with LLA to determine its internal consistency, item-subscale correlation, test-retest reliability and floor and ceiling effects. To assess the construct validity, each participant's performance was measured using the Timed Up and Go (TUG) and 2-Minute Walk Test.


RESULTS
Minimum Cronbach's alpha of 0.70 was exceeded by LCI-5 subscales. Item-subscale correlations after correction for overlap were higher than the cuff-off point of 0.40. The intraclass correlation coefficient was 0.96 for LCI-5 total index in test-retest reliability. LCI-5 showed significant correlation with TUG (r = -0.65, P < 0.01) and 2-Minute Walk Test (r = 0.71, P < 0.01). The LCI-5 mean scores were higher for individuals with unilateral below-knee amputation than participants with above-knee amputation (t = 2.71, P = 0.008) and for individuals with unilateral amputation who do not use walking aids than those who use (t = -4.27, P < 0.01). Floor effect was found for none of the patients with LLA while ceiling effect was reported for 23.6% of patients.


CONCLUSIONS
The Persian version of LCI-5 has acceptable levels of internal consistency, item-subscale correlation, test-retest reliability and construct validity. To detect intervention effects, the LCI-5 should be used cautiously in population of physically active and young patients with LLA due to its high ceiling effects.
Salavati
Mahyar
M
Department of Physical Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Mazaheri
Masood
M
Khosrozadeh
Fatemeh
F
Mousavi
Seyed Mohammad Ebrahim
SM
Negahban
Hossein
H
Shojaei
Hadi
H
D000203:Activities of Daily Living / Q000523:psychology*; D000328:Adult; D000671:Amputation, Surgical / Q000523:psychology / Q000534:rehabilitation*; D016001:Confidence Intervals; D003469:Culture; D004185:Disability Evaluation; D005080:Exercise Test; D005260:Female; D006801:Humans; D007492:Iran; D007802:Language; D008124:Locomotion; D035002:Lower Extremity / Q000601:surgery*; D008297:Male; D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D014177:Translations