A randomised controlled trial to measure the effect of chest pain unit care upon anxiety, depression, and health-related quality of life [ISRCTN85078221]

Table 3 Mean SF-36 scores at two days

	N (% completed)	CPU care	Routine care	Difference	95% CI	P-value	ρ
				Unadjusted
				Adjusted
Physical functioning	694 (96.7%)	74.8	69.7	5.1	1.1 to 9.0	0.012	0.002
				4.2	0.4 to 7.9	0.029
Social functioning	703 (98.0%)	72.2	69.8	2.4	-1.7 to 6.6	0.252	0
				1.5	-2.7 to 5.6	0.49
Role-physical	684 (95.4%)	50.4	46.0	4.4	-2.2 to 11.0	0.191	0.028
				3.3	-3.3 to 10.0	0.326
Role-emotional	685 (95.5%)	64.7	59.5	5.2	-1.2 to 11.6	0.113	0
				5.1	-1.2 to 11.4	0.111
Mental health	700 (97.6%)	66.9	64.7	2.2	-0.9 to 5.3	0.158	0
				2.3	-0.7 to 5.4	0.132
Vitality	697 (97.2%)	52.3	47.6	4.6	1.3 to 8.0	0.007	0
				4.6	1.3 to 8.0	0.007
Pain index	701 (97.7%)	50.8	49.0	1.8	-1.9 to 5.5	0.351	0
				2.0	-1.7 to 5.7	0.284
General health	688 (96.0%)	60.3	54.5	5.7	2.3 to 9.2	0.001	0
				5.4	2.0 to 8.8	0.002

Upper row shows unadjusted analysis (primary analysis) Lower row shows adjusted analysis (secondary analysis) ρ = Intraclass correlation coefficient. This provides a measure of the amount of clustering of each outcome by the unit of randomisation (day).

ISSN: 1477-7525