Quality of life and influencing factors of patients with rheumatoid arthritis in Northeast China

Table 1 Scale effectiveness test

reliability	Internal consistency reliability	Retest reliability	validity
reliability	α	α	validity
SF-36	0.69	0.72	acceptable
WHOQOL-bref	0.84	0.86	fair
QLICD-RA	0.42	0.69	poor
structure validity	KMO	Bartlett’s sphericity test	cumulative contribution
SF-36 scale	0.94	P < 0.001	80.23%
WHOQOL-bref	0.95	P < 0.001	80.23%
QLICD-RA	0.94	P < 0.001	70.24%
scale correlation	SF-36	WHOQOL-bref	QLICD-RA
scale correlation	r P	r P	r P
SF-36	1 -	0.84 <0.001	0.92 <0.001
WHOQOL-bref		1 -	0.87 <0.001
QLICD-RA			1 -

*Reliability: Cronbach’s alpha; structure validity: Kaiser-Meyer-Olkin (KMO) statistic; Bartlett test of Sphericity; scale correlation: Pearson’s correlation coefficient

ISSN: 1477-7525