Table 3.

Sensitivity analysis: mean WTP and cost of treatment

Intervention	WTP	Cost	NPV (WTP − cost) [95 % CI]	INB (NPV oral − NPV LNG-IUS)
LNG-IUS	£365	£260	£106 [£−10 to £221]
Oral treatment	£372	£98	£274 [£168 to £380]	£168
Mean difference	£−7	£162

CI confidence interval, INB incremental net benefit, LNG-IUS levonorgestrel-releasing intrauterine system, NPV net present value, WTP willingness to pay

Cost data are reported in UK (£) sterling and the cost year is 2011. Costs are rounded to the nearest whole number