Fig. 1

Cost-effectiveness planes for health sector cost per point improvement in K10 score at six and 12 months. a Six months all participants (n = 1671). b Six months mild/moderate (n = 830). c Six months severe (n = 841). d 12 months all participants (n = 1671). e 12 months mild/moderate (n = 830). f 12 months severe (n = 841). Notes: Each cost-effectiveness plane is comprised of 1000 incremental cost-effectiveness ratios (the difference in mean health sector costs divided by the difference in mean K10 scores) between the intervention and control groups estimated through the non-parametric bootstrapping of the multiple imputed data. The percentage of the 1000 cost-effectiveness ratios falling in each quadrant is reported. The upper right-hand quadrant of the plane is where Link-me has both higher incremental costs and benefits (improvement in K10 score) compared to the control group. The upper left-hand quadrant of the plane is where Link-me has higher incremental costs and lower incremental benefits compared to the control group, also referred to as dominated. The lower right-hand quadrant of the plane is where Link-me has lower incremental costs and higher incremental benefits, referred to as dominant. The lower left-hand quadrant of the planes is where Link-me has both lower incremental costs and benefits compared to the control group