Table 4.
Effect of Dietary Sodium on Headache Status by Sex and BMI† (Respondents Who Did Not Use Chronic Analgesics or Prescription Analgesics in Past Month, NHANES 1999–2004)
| Men, Lower BMI (N = 2133) | Men, Higher BMI (N = 2135) | Women, Lower BMI (N = 2275) | Women, Higher BMI (N = 2276) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Exposure category | Odds ratio | (95% CI) | P trend | Odds ratio | (95% CI) | P trend | Odds ratio | (95% CI) | P trend | Odds ratio | (95% CI) | P trend |
| Dietary sodium residuals | ||||||||||||
| 1st quartile | 1.00 | — | .36 | 1.00 | — | .40 | 1.00 | — | .007 | 1.00 | — | .95 |
| 2nd quartile | 1.02 | (0.67, 1.55) | 0.86 | (0.59, 1.25) | 0.91 | (0.68, 1.22) | 0.93 | (0.72, 1.20) | ||||
| 3rd quartile | 0.99 | (0.67, 1.46) | 0.89 | (0.59, 1.33) | 0.78 | (0.56, 1.09) | 0.87 | (0.64, 1.17) | ||||
| 4th quartile | 0.82 | (0.52, 1.27) | 0.80 | (0.50, 1.28) | 0.66 | (0.49, 0.88) | 0.99 | (0.71, 1.37) | ||||
†Adjusted for age. In women, interaction between sodium residuals and BMI was significant (P = .025).