Percentage change in risk of myocardial infarction and CIs attributable to 1 SD increase in a 3-day average of daily mean temperature, mean wind speed, atmospheric pressure, mean relative humidity and precipitation as snow for men and women and for those aged 35–64 and ≥65 years (the Tromsø Study 1974–2004)
| Weather variables (SD) | All | Men | Women | Age 35–64 yrs | Age ≥65 yrs | |||||
| Risk change | 95% CI | Risk change | 95% CI | Risk change | 95% CI | Risk change | 95% CI | Risk change | 95% CI | |
| Daily mean temperature (6.7°C) | −3.7 | −8.0 to 1.0 | −4.5 | −9.6 to 0.1 | −0.6 | −8.9 to 8.6 | −2.1 | −8.0 to 4.2 | −7.4 | −13.7 to −0.7 |
| Mean wind speed (2.0 m/s) | −3.6 | −9.3 to 2.5 | −6.8 | −13.3 to 0.2 | 4.2 | −7.0 to 16.9 | −4.4 | −11.9 to 3.7 | 1.5 | −7.9 to 11.8 |
| Mean atmospheric pressure (12.6 hPa) | 1.7 | −3.2 to 6.9 | 0.8 | −5.0 to 6.9 | 3.9 | −5.5 to 14.3 | −0.6 | −7.0 to 6.1 | 2.9 | −4.7 to 11.1 |
| Mean relative humidity (15.1%) | −0.0 | −5.6 to 5.9 | −1.0 | −7.6 to 5.9 | 2.7 | −7.9 to 14.5 | 0 | −7.4 to 8.0 | −2.1 | −10.1 to 6.5 |
| Precipitation, snow, all seasons (2.7 mm) | 0.4* | −5.6 to 6.9 | −2.8 | −9.9 to 4.8 | 7.9 | −3.2 to 20.2 | −4.8 | −12.8 to 3.8 | 8.8 | −0.2 to 18.7 |
| Precipitation, snow, winter only (2.7 mm) | −2.0* | −9.1 to 5.7 | −5.7 | −14.0 to 3.5 | 5.8 | −7.2 to 20.6 | −5.5 | −14.8 to 4.9 | 4.9 | −6.1 to 17.1 |
↵* p=0.03 for interaction with age.