The use of bootstrap methods for analysing health-related quality of life outcomes (particularly the SF-36)

Table 1 CPSW Study Simple cross-sectional comparison of 6 week HRQoL for Control vs. Intervention Groups

*SF-36 Dimension*	*Group*	n	*mean*	sd	*Mean Diff*	*t-test equal σ's P-value*	*MW test P-value*	*Bootstrap P-value*
Physical	Control	241	89.9	14.5	2.6	0.060	0.015	0.057
Function	Intervention	254	87.3	15.8
Role	Control	241	74.3	38.1	9.1	0.009	0.004	0.010
Physical	Intervention	254	65.2	39.5
Bodily	Control	241	75.6	23.7	4	0.065	0.040	0.062
Pain	Intervention	254	71.6	23.8
General	Control	241	77.7	17.7	2.4	0.139	0.147	0.131
Health	Intervention	254	75.3	18.5
Vitality	Control	241	51.1	20.7	1.3	0.498	0.596	0.494
	Intervention	254	49.8	21.7
Social	Control	241	81.6	22.7	4.7	0.025	0.015	0.024
Function	Intervention	254	76.9	24.2
Role	Control	241	77.9	36.4	1.1	0.734	0.503	0.737
Emotional	Intervention	254	76.8	35.5
Mental	Control	241	72.9	17.2	-0.2	0.902	0.972	0.904
Health	Intervention	254	73.1	16.7

ISSN: 1477-7525