Table 3 Cumulative incidence, incidence density rates and rate ratios for coronary heart disease at 12-years follow-up by spatial T wave axis quartile by gender. The ARIC study
From: The association of spatial T wave axis deviation with incident coronary events. The ARIC cohort
Risk estimate | Spatial T wave axis deviation quartile among women | |||
|---|---|---|---|---|
|  | T axis quartile 1: 0.33–14.75° | T axis quartile 2: 14.75–22.38° | T axis quartile 3: 22.39–30.32° | T axis quartile 4: 30.33–60.88° |
Number of event-free participants at baseline | 1787 | 1788 | 1784 | 1784 |
Number of CHD Events | 54 | 57 | 53 | 86 |
Cumulative Incidence [%] | 3.02 | 3.19 | 2.97 | 4.82 |
Person-years | 21168 | 21176 | 21108 | 20838 |
Unadjusted Incidence Rate per 1000 person-years (95% CI) | 2.56 (1.87–3.23) | 2.70 (1.99–3.39) | 2.51 (1.83–3.19) | 4.13 (3.25–4.99) |
Unadjusted Incidence Rate Ratio (95% CI) | 1 (referent) | 1.05 (0.72–1.53) | 0.98 (0.67–1.44) | 1.62 (1.15–2.27) |
Adjusted* Incidence Rate Ratio | 1 (referent) | 1.03 (0.71–1.50) | 0.93 (0.64–1.36) | 1.44 (1.02–2.04) |
Risk estimate | Spatial T wave axis deviation quartile among men | |||
|  | T axis quartile 1 0.19–16.19° | T axis quartile 2 16.19–21.77° | T axis quartile 3 21.77–30.40° | T axis quartile 4 30.19–60.76° |
Number of event-free participants at baseline | 1281 | 1276 | 1279 | 1277 |
Number of CHD Events | 104 | 92 | 96 | 111 |
Cumulative Incidence [%] | 8.12 | 7.21 | 7.51 | 8.69 |
Person-years | 14699 | 14605 | 14603 | 14410 |
Unadjusted Incidence Rate per 1000 person-years (95% CI) | 7.08 (5.72–8.44) | 6.30 (5.01–7.59) | 6.57 (5.26–7.89) | 7.70 (6.27–9.13) |
Unadjusted Incidence Rate Ratio (95% CI) | 1 (referent) | 0.89 (0.67–1.18) | 0.93 (0.70–1.23) | 1.09 (0.83–1.42) |
Adjusted* Incidence Rate Ratio | 1 (referent) | 0.90 (0.68–1.20) | 0.94 (0.72–1.25) | 1.08 (0.83–1.42) |