Household food insecurity and overweight/obesity among Ecuadorian adults: heterogeneity by sex in a nationally representative cross-sectional study

Analysis plan, amendments, code and aggregated outputs for a nationally representative cross-sectional analysis of ENSANUT Ecuador 2018 (adults aged 19–59 years). The study examines the association between household food insecurity, classified with a study-derived ELCSA-based algorithm applied to Section 6 item responses, and measured overweight/obesity and obesity, with heterogeneity by sex and socioeconomic position assessed through survey-weighted prevalence-ratio models. The statistical analysis plan (v0.1–v0.3) and its addenda were dated internally on 25–26 August 2026, before the final models were fitted, and are deposited unchanged. Addendum v0.4 specifies the analyses requested during peer review and was registered before those analyses were run. No individual-level data are shared; ENSANUT microdata are available from INEC.