Table 1.

Meta-analysis based on questionnaires

Groups	Studies (n)	Effect size and 95% CI					Test of null (two-tailed)
		Point estimate	SE	Variance	Lower limit	Upper limit	Z value	P value
EORTC QLQ-C30	26	64.72	2.79	7.81	59.24	70.20	23.16	0.00
FACT- B	17	84.39	10.28	105.70	64.24	104.54	8.21	0.00
QLQ-BR23	8	66.33	1.82	3.32	62.76	69.90	36.41	0.00
SF-36	9	57.23	4.89	23.91	47.65	66.82	11.70	0.00