Cost-effectiveness analysis of three health interventions to prevent malaria in pregnancy in an area of low transmission in Uganda

Abstract

Pregnant women and their unborn children are vulnerable to malaria, increasing the risk of maternal anaemia, low birthweight (LBW) and intrauterine growth retardation. There is little evidence on the cost-effectiveness of intermittent preventive treatment in pregnancy (IPTp) and insecticide-treated bednets (ITN) in areas of low transmission. A randomised controlled trial with three arms was conducted in antenatal clinics in Kabale District (Uganda), an epidemic-prone highland area of low malaria transmission. The interventions were: (i) IPTp with sulfadoxine/pyrimethamine (SP) given twice during pregnancy (IPTp-SP); (ii) ITNs alone; and (iii) a combined intervention with both ITNs and IPTp-SP. Primary health outcomes were LBW and maternal anaemia. The costs of providing IPTp-SP and ITNs as well as treatment of malaria episodes were captured from all health centres in the study area. There were no significant differences in health outcomes among the three interventions. The cost-effectiveness analysis and sensitivity analyses performed did not provide convincing support for replacing IPTp-SP (current policy) by ITNs alone or by a combined intervention in this low-transmission setting on economic grounds. The cost per pregnant woman of providing the services was lowest for the IPTp-SP intervention (US$0.79 per woman) followed by ITNs (US$1.71) and the combined intervention of IPTp-SP + ITNs (US$2.48). The relative cost-effectiveness of antenatal distribution of ITNs might improve if the cost savings accruing from continued use of a long-lasting insecticidal net after pregnancy as well as positive externalities were also taken into account, and this warrants further study. [ClinicalTrials.gov identifier: NCT00142207].

Figures

Figure 1. Scatter plot of incremental costs (US$) and incremental effects [disability-adjusted life years (DALY) averted] resulting from replacing the intermittent preventive treatment in pregnancy with sulfadoxine/pyrimethamine (ITPp-SP) intervention by the intervention with insecticide-treated bednets (ITN) alone in an area of low and unstable malaria transmission, Kabale District, Uganda (US$1 = UGX1760).

Figure 2. Scatter plot of incremental costs (US$) and incremental effects [disability-adjusted life years (DALY) averted] resulting from replacing the intermittent preventive treatment in pregnancy with sulfadoxine/pyrimethamine (ITPp-SP) intervention by the combined intervention of IPTp-SP plus insecticide-treated bednets (ITN) in an area of low and unstable malaria transmission, Kabale District, Uganda (US$1 = UGX1760).

Figure 3. Cost-effectiveness acceptability curves for replacing intermittent preventive treatment in pregnancy with sulfadoxine/pyrimethamine (ITPp-SP) (current practice) with (i) insecticide-treated bednets (ITN) only or (ii) a combined intervention of IPTp-SP plus ITNs, in an area of low and unstable malaria transmission, Kabale District, Uganda (US$1 = UGX1760). DALY: disability-adjusted life years.