Fig. 3

Cost-effectiveness acceptability curve (CEAC) for the cost-utility for the provision of the CHIMPs intervention for families with a parent with a mental illness in addition to treatment as usual in the German health and social care system. At the horizontal axis the CEAC shows potential values for MWTP in an increasing order, the vertical axis shows the percentages of the estimated ICUR values which are located below the MWTP curve. Similar as the statistical confidence interval the CEAC indicates at which MWTP a particular percentage of the estimated ICUR fall below the MWTP curve. A percentage of acceptance of 95% is regarded as equivalent to a one sided statistical significance of 2.5%. (wtp = willingness to pay in €)