Quality of life of Chinese urban community residents: a psychometric study of the mainland Chinese version of the WHOQOL-BREF

Table 3 Convergent validity of WHOQOL-BREF

	Dimension
	Physical	Psychological	Social relationship	Environmental
Item Convergence^a	4/7	5/6	3/3	8/8
Item Discriminant/Convergent Validity^b
(i) Intrascale item-corrected total correlations
mean correlations	0.39	0.50	0.53	0.48
median correlations	0.41	0.45	0.53	0.50
Range	0.44	0.40	0.01	0.12
(ii) Interscale item-total correlations
mean correlations	0.29	0.37	0.40	0.31
median correlations	0.34	0.36	0.40	0.30
Range	0.61	0.35	0.15	0.36
Correlations among Domains^c
Physical Domain	1
Psychological Domain	0.53(0.57,0.70,0.71)	1
Social relationship Domain	0.47(0.55,0.61,0.53)	0.52(0.60,0.73,0.73)	1
Environmental Domain	0.40(0.54,0.72,0.57)	0.58(0.59,0.76,0.72)	0.50(0.61,0.71,0.65)	1

^aThe ratio of items to corrected-total correlated (i.e., item to corrected-total correlation) > 0.40
^bFor example, for the Physical Domain, 0.39 is the mean (whereas 0.41 is the median) of the 7 item-corrected total correlations for the 7 items within the Physical Domain; whereas 0.29 is the mean (0.34 is the median) of the 21 (7 × 3) correlations between the 7 items in the Physical Domain and the three other Domain scores
^cin brackets: Chinese data [35–37]