Adjusted* hazard ratios (HR) of death from ischaemic heart disease in combined categories of heart rate and physical activity among Norwegian men
| Physical activity index | ||||
| High score† | Low score† | <1 per week | No activity | |
| ≤60 bpm | ||||
| Deaths | 56 | 73 | 41 | 35 |
| Person-years | 34181 | 20285 | 16604 | 5755 |
| HR (95% CI) | 1.07 (0.78 to 1.48) | 1.32 (0.99 to 1.77) | 1.21 (0.85 to 1.73) | 1.56 (1.07 to 2.29) |
| 61–73 bpm | ||||
| Deaths | 116 | 151 | 101 | 71 |
| Person years | 49379 | 51679 | 54798 | 19512 |
| HR (95% CI) | 1.0 (Reference)‡ | 1.00 (0.78 to 1.27) | 1.01 (0.77 to 1.32) | 1.07 (0.79 to 1.44) |
| 74–87 bpm | ||||
| Deaths | 90 | 172 | 103 | 82 |
| Person-years | 27368 | 37228 | 42870 | 17616 |
| HR (95% CI) | 1.09 (0.83 to 1.44) | 1.28 (1.01 to 1.62) | 1.15 (0.88 to 1.50) | 1.34 (1.00 to 1.78) |
| ≥88 bpm | ||||
| Deaths | 76 | 87 | 62 | 58 |
| Person-years | 10585 | 19868 | 20764 | 9745 |
| HR (95% CI) | 1.94 (1.45 to 2.59) | 1.05 (0.80 to 1.39) | 1.20 (0.88 to 1.64) | 1.37 (1.00 to 1.89) |
↵* Adjusted for age (continuous), body mass index (<18.5, 18.5–24.9, 25.0–29.9, >30 kg/m2), marital status (married, unmarried, widow(er), divorced/separated), education (<10, 10–12, ≥13 years and unknown), alcohol consumption (frequency last 2 weeks: 0, 1–4, ≥5, total abstainer and unknown), and smoking status (never, former, current and unknown).
↵† Summary score combining information on frequency, duration and intensity among those who exercised once a week or more (low score defined as less than median and high score defined as equal to or more than median).
↵‡ Participants who reported high physical activity and in second quartile of heart rate served as reference group.
bpm, beats per minute; CI, confidence interval.