Table 5. Association Between Different Times of Day Sports-related Physical Activity and the Onset of AMI.
| Sports-related physical activity a | Non-AMI (%) | AMI (%) | Unadjusted OR (95%CI) | Adjusted OR b (95%CI) | P Value |
|---|---|---|---|---|---|
| None | 146(42.0) | 184(52.9) | 1(reference) | 1(reference) | |
| Morning (6:00–10:00) | 73(21.0) | 48(13.8) | 0.52(0.34–0.80) | 0.60(0.36–0.98) | 0.042 |
| Noon (10:00~14:00) | 0(0.0) | 6(1.7) | -- | -- | -- |
| Afternoon (14:00–18:00) | 25(7.2) | 24(6.9) | 0.76(0.42–1.39) | 0.87(0.44–1.71) | 0.685 |
| Evening (18:00–22:00) | 89(25.6) | 69(19.8) | 0.61(0.42–0.90) | 0.56(0.37–0.87) | 0.009 |
| Night (22:00–2:00) | 0(0.0) | 0(0.0) | -- | -- | -- |
| Early morning (2:00–6:00) | 15(4.3) | 17(4.9) | 0.90(0.43–1.86) | 0.98(0.43–2.27) | 0.973 |
| Morning (6:00–10:00) | 73(21.0) | 48(13.8) | 1(reference) | 1(reference) | |
| Evening (18:00–22:00) | 89(25.6) | 69(19.8) | 1.18(0.73–1.91) | 0.93(0.54–1.64) | 0.824 |
Abbreviations: AMI, acute myocardial infarction; OR, odds ratio; CI, confidence interval.
a Participants were defined as exercisers if they have done sports-related physical activity, which is a subcategory of physical activity, that is planned, structured, repetitive, and aims to improve or maintain one or more components of physical fitness, for at least 5 years, and still exercised in the recent 3 months before they went to hospital.
b Adjustment for age, sex, smoking status, alcohol use, work-related activity, hypertension, dyslipidemia, diabetes mellitus, family history of CAD, the severity of coronary stenosis, and body mass index in the analysis.