Effectiveness and cost-effectiveness of the PLAN-A intervention, a peer led physical activity program for adolescent girls: results of a cluster randomised controlled trial

Table 6 Quality of Life scores, QALYs and costs

	Control	Intervention	Differences between groups (95 % CI) (= Incremental costs/ effects)
	Mean (sd)	Mean (sd)	Unadjusted (1000 bootstrapped 95 % CI)	Adjusted for baseline level and stratification variables^a
KIDSCREEN-10 change score T0 to T1 (n = 694, 680) ^b	-0.340 (0.830)	-0.229 (0.888)	0.111 (0.016 0.195)	0.095 (-0.120, 0.202)
CHU-9D change score T0 to T1 (n = 676,662) ^b	-0.030 (0.077)	-0.025 (0.081)	0.005 (-0.004, 0.014)	0.004 (-0.006, 0.015)
EQ-5D-Y VAS change score T0 to T1 (n = 678, 656) ^b	-4.643 (22.999)	-2.228 (21.678)	2.405 (0.106, 4.705)	1.136 (-2.807, 5.080)
QALYs (n = 676, 662) ^b	0.822 (0.088)	0.822 (0.087)	0.001 (-0.009, 0.010)	0.002 (-0.003, 0.007)
Per-pupil intervention cost (n = 937, n = 904) ^b	nil	£31.16	£30.50	N/A

Note: Patient reported outcome, utility and QALY measures are reported to 3 decimal places due to the small differences
^a adjusted for baseline level and the stratification variables (area and weighted IMD)
^b All are complete cases (pupils with measurements at T0 and T1) with the exception of per-pupil costs, which related to the total number of girls on the roll at the start of year 9

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