Adaptation and psychometric evaluation of the simplified Chinese version of the identification of functional ankle instability questionnaire in Chinese-speaking patients with chronic ankle instability disorders

Table 4 Construct validity of the SC-IdFAI

Correlation coefficient r_s (P value) ^a	C-IdFAI subscales
Correlation coefficient r_s (P value) ^a	Overall Scale	Factor 1	Factor 2	Factor 3	Hypotheses
FAAM
ADL	− 0.776 (< 0.001) ^b	− 0.668 (< 0.001) ^b	− 0.575 (< 0.001) ^b	− 0.738 (< 0.001) ^b	≥ Moderate, and better than SF-36 wih SC-IdFAI
Sport	− 0.775 (< 0.001) ^b	− 0.644 (< 0.001) ^b	− 0.636 (< 0.001) ^b	− 0.669 (< 0.001) ^b	≥ Moderate, and better than SF-36 wih SC-IdFAI
SF-36
Physical Function	− 0.412 (< 0.001) ^b	− 0.395 (< 0.001) ^c	− 0.295 (0.001) ^c	− 0.344 (< 0.001) ^c	≥ Moderate, and worse than FAAM wih SC-IdFAI
Role-Physical	−0.551 (< 0.001) ^b	− 0.511 (< 0.001) ^b	− 0.405 (< 0.001) ^b	− 0.424 (< 0.001) ^b
Bodily Pain	− 0.482 (< 0.001) ^b	− 0.441 (< 0.001) ^b	− 0.359 (< 0.001) ^c	− 0.422 (< 0.001) ^b
General Health	−0.549 (< 0.001) ^b	− 0.529 (< 0.001) ^b	− 0.323 (< 0.001) ^c	−0.511 (< 0.001) ^b
Vitality	−0.372 (< 0.001) ^b	− 0.404 (< 0.001) ^c	− 0.155 (0.075) ^b	−0.278 (0.001) ^b	≤ Poor, and worse than physical subscales of SF-36 and SC-IdFAI
Social Function	−0.242 (0.005) ^b	−0.173 (0.047) ^b	− 0.230 (0.008) ^b	−0.107 (0.223) ^b
Role-Emotional	0.035 (0.694) ^b	0.066 (0.455) ^b	−0.048 (0.586) ^b	0.050 (0.568) ^b
Mental Health	−0.137 (0.119) ^b	−0.116 (0.186) ^b	− 0.083 (0.345) ^b	−0.141 (0.108) ^b

^a Calculated by the Spearman’s correlation coefficient (r_s) of the overall scale and subscales of the SC-IdFAI with FAAM and SF-36
^b Consistent with the Hypothesis
^c Inconsistent with the Hypothesis
SC-IdFAI Simplified Chinese version of the Identification of Functional Ankle Instability questionnaire; FAAM Foot and ankle ability measure; ADL Activity of daily living; SF-36 Short-Form 36

ISSN: 1471-2474