Effect of free healthcare policy on the use of healthcare services by sick children aged under 5 years in Burkina Faso (2013–2018), compared with control group (5–14 years)
| Independent variables | IRR* | P value | 95% CI |
| Time before the policy (reference: control group) | 1.018 | <0.001 | 1.017 to 1.019 |
| Time after the policy (reference: control group) | 1.025 | <0.001 | 1.023 to 1.026 |
| Constant | 0.0005 | <0.001 | – |
*Model adjusted for health workforce and geographical accessibility.
IRR, incidence rate ratio.