a significant trendP = .0455
Compared to respondents with the lowest dietary sodium residuals, there was a significant trend of decreasing odds of migraine history with increasing levels of dietary sodium residuals (OR = 0.93, 95% CI = 0.87, 1.00, P = .0455); this relationship remained after covariate adjustment (OR = 0.93, 95% CI = 0.87, 1.00, P = .0503).