The cost effectiveness of treating Bell’s palsy with prednisolone in children is unknown. This study aimed to assess the cost effectiveness of prednisolone, compared with placebo, in treating Bell’s Palsy in children from a healthcare sector perspective.

This economic evaluation was a prospectively planned secondary analysis of a triple-blind randomized superiority trial conducted from 2015 to 2020 that compared prednisolone with placebo. The time horizon was six months after randomization. The 180 participants were aged from six months to 17 years and presented within 72 hours of onset of clinician diagnosed Bell’s palsy. Interventions were oral prednisolone (1 mg per kg daily) or taste-matched placebo administered for ten days. Incremental cost-effectiveness ratios comparing prednisolone with placebo were estimated. Costs included medication costs, doctor visits, and medical tests over the six-month study period. Effectiveness was measured using quality-adjusted life-years (QALYs) derived from the Child Health Utility 9D instrument. Nonparametric bootstrapping was performed to capture uncertainties. Prespecified subgroup analyses by age (12 to 17 years versus <12 years) were performed.

The mean cost per patient was USD188 in the prednisolone group and USD121 in the placebo group over the six-month period (difference USD66, 95% confidence interval [CI]: 47, 179). The mean QALYs gained over six months were 0.45 in the prednisolone group and 0.44 in the placebo group (difference 0.01, 95%CI: -0.01, 0.03). Prednisolone was very likely cost effective given a conventional willingness-to-pay threshold of USD 50,000 per QALY gained (the cost per additional QALY gained was USD6,625 using prednisolone compared with placebo). Subgroup analysis suggested that this was primarily driven by the high probability of prednisolone being cost effective in children aged 12 to 17 years (98%), compared with those younger than 12 years (51%).

This study provides new evidence to stakeholders and policy makers who are considering whether to make prednisolone available for treating Bell’s palsy in children aged 12 to 17 years.