Cost-utility of routine cataract surgery

Table 4 Cost-utility sensitivity analysis

	Patients with only one eye operated n = 87 Group A			Patients with both eyes operated n = 73 Group B			Patients who had had their first eye operated earlier and now the second eye was operated n = 59 Group C
	Costs	QALY gain	Cost per QALY gained	Costs	QALY gain	Cost per QALY gained	Costs	QALY gain	Cost per QALY gained
Base case analysis using mean values	1318	0.1605	8212	2289	0.4464	5128	1323	-0.0219	Can not be established
Base case analysis using median values	1301	0.0332	39188	2342	0.2989	7835	1195	-0.0234	Can not be established
Sensitivity analysis varying the discount rate for QALYs
discount rate 5%		0.0710	18563		0.2873	7967		-0.0397	Can not be established
discount rate 3%		0.0982	13422		0.3377	6778		-0.0375	Can not be established
discount rate 1%		0.1390	9482		0.4052	5649		-0.0329	Can not be established
Sensitivity analysis varying treatment effectiveness (QALY gain)
upper 95% CI		0.3613	3648		0.7256	3155		0.1716	7710
lower 95% CI		-0.0403	Can not be established		0.1672	13690		-0.2153	Can not be established
Sensitivity analysis varying treatment costs
upper 95% CI	1357		8455	2351		5267	1417		Can not be established
lower 95% CI	1279		7969	2227		4989	1229		Can not be established

Base case and sensitivity analyses varying the discount rate between 1–5%, using median values, and using the upper and lower values of the 95% confidence interval (CI) for the mean differences in treatment effectiveness (improvement in health-related quality of life) and costs (QALY = quality-adjusted life year).

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