Construct validity, test–retest reliability and internal consistency of the Thai version of the disabilities of the arm, shoulder and hand questionnaire (DASH-TH) in patients with carpal tunnel syndrome

Table 2 Comparing fit statistics among models (N = 90)

Fit indices	Hypothesized-5 factor^a	Six-factor	Five-factor	Four-factor	Three-factor	Two-factor	One-factor
Chi square	976.995	390.704	518.185	685.468	840.903	1228.741	1266.713
Df	395	270	295	321	348	376	405
RMSEA	0.128 (0.118 0.138)	0.070 (0.054 0.085)	0.092 (0.079 0.105)	0.112 (0.101 0.124)	0.125 (0.115 0.136)	0.159 (0.115 0.169)	0.206 (0.193 0.219)
CFI	0.967	0.993	0.987	0.979	0.972	0.952	0.840
TLI	0.964	0.989	0.981	0.972	0.965	0.944	0.828
SRMR/WRMR	0.968^b	0.042	0.049	0.059	0.068	0.090	0.152

Df degree of freedom, RMSEA root-mean-square error of approximation, CFI comparative fit index, SRMR standardized root-mean-square residual, TLI Tucker–Lewis index, WRMR weighted root mean square residual
^aCFA 5 domain: factor 1, 1–16; factor 2, 17–21; factor 3, 22–23; factor 4, 24–28; factor 5, 29–30
^bThis value was calculated by WRMR

ISSN: 1756-0500