Analysis plan: The blood-pressure gap in antenatal care, a multi-country analysis of DHS surveys (Rinnit Research study 1)

Pre-specified analysis plan for Rinnit Research study 1, fixed and approved on 11 November 2026 before the full data was pulled. The study asks: in each country's most recent Demographic and Health Survey (DHS), what percentage of women who received antenatal care for their most recent birth did not have their blood pressure measured? It uses national estimates published by The DHS Program (indicator RH_ANCS_W_BLP, with urine-sample and blood-sample indicators for comparison). The analysis is descriptive. The plan sets the questions, inclusion rules, calculations and limits in advance; any later change will be listed in the published study. This is a Rinnit original analysis and is not peer-reviewed. AI assistance: Claude (Anthropic) and Gemini 4 Argon (Google) assist with data handling and drafting under the author's review. Publisher: Rinnit, https://www.rinnit.com