Odds ratios for myocardial infarction associated with temperature and potential confounders in the final model—fixed/single lag effects*
| Potential confounders | Odds ratio (95% CI) | P value |
| Holiday | 0.97 (0.85 to 1.11) | 0.701 |
| Day of week: | ||
| Sunday | 1 (reference) | <0.001 |
| Monday | 1.17 (1.11 to 1.23) | |
| Tuesday | 1.06 (1.00 to 1.11) | |
| Wednesday | 1.07 (1.02 to 1.13) | |
| Thursday | 1.05 (0.99 to 1.10) | |
| Friday | 1.08 (1.03 to 1.14) | |
| Saturday | 0.99 (0.94 to 1.04) |
*All lag terms were included in model simultaneously; model also adjusted for residual seasonality within calendar months by using single harmonic Fourier series.17