Odds ratio for stroke in relation to blood fatty acids concentration according to study covariates. Results are expressed as odds ratio (and 95% CI) per SD unit increase in blood fatty acids concentration. Model was adjusted for recruitment place, demographic and lifestyle variables (age, sex, non‐European ancestry, smoking, alcohol drinking, and body mass index). UKCTOCS was excluded from the analysis stratified by body mass index, as this was not a matching variable in the case‐control design. Only the SABRE study had enough participants to contribute to analyses in the non‐Europeans stratum. P value for interaction threshold after Bonferroni correction=0.05/48=0.001. BMI indicates body mass index; DHA, docosahexaenoic acid; LA, linoleic acid; MUFA, monounsaturated fatty acids; OR, odds ratio; SFA, saturated fatty acids.