Economic evaluation of a weight control program with e-mail and telephone counseling among overweight employees: a randomized controlled trial

Table 5 Incremental cost-effectiveness ratios and distribution of the joint cost-effect pairs in the cost-effectiveness planes of the phone group resulting from the main analyses and the sensitivity analyses

Analysis ^a	Sample size per group		ΔC (95% CI)	ΔE (95% CI)		Distribution in CE plane (%)
	Control	Phone	Euros	Weight loss (kg)	ICER	NE ^b	SE ^c	SW ^d	NW ^e
Main	448	453	352 (−462; 1095)	0.3 (−0.6; 1.3)	1009	65	14	6	16
Complete cases	134	147	593 (−157; 1458)	1.1 (−0.02; 2.2)	543	91	7	0	2
Company perspective	448	453	270 (−525; 997)	0.3 (−0.6; 1.3)	772	62	17	7	13
				QALY	ICUR
Main	448	453	352 (−490; 1099)	0.001 (−0.03; 0.03)	245,242	41	14	5	40
Complete cases	120	140	423 (−458; 1250)	0.006 (−0.04; 0.05)	131,863	50	13	3	34
Company perspective	448	453	270 (−525; 997	0.001 (−0.03; 0.03)	187,545	37	17	8	38
UK tariff	448	453	352 (−490; 1099)	0.007 (−0.04;0.05)	52,496	50	13	7	30

^a In the analysis ΔC= mean difference in total costs, ΔE= mean difference in outcome, ICER (ICUR) =incremental cost-effectiveness (utility) ratio calculated as ΔC/ΔE. In the main analysis missing data were multiply imputed. The complete cases analysis was restricted to participants with complete cost and effect data. ^b Northeast quadrant of the CE-plane: the intervention is more effective and more costly than self-help brochures. ^c Southeast quadrant of the CE-plane: the intervention is more effective and less costly than self-help brochures. ^d Southwest quadrant of the CE-plane: the intervention is less effective and less costly than self-help brochures. ^e Northwest quadrant of the CE-plane: the intervention is less effective and more costly than self-help brochures.

ISSN: 1479-5868