Table 2 Association of cumulative AIP with ischemic stroke
| Â | Case/Total | Incidence rate, per 1000 person-years | Model 1 | Model 2 | Model 3 |
|---|---|---|---|---|---|
Quartiles | Â | Â | Â | Â | Â |
Q1 | 513/13,530 | 3.50 | 1.00 | 1.00 | 1.00 |
Q2 | 638/13,531 | 4.38 | 1.25(1.12,1.41) | 1.17(1.04,1.32) | 1.17(1.03,1.32) |
Q3 | 752/13,531 | 5.17 | 1.50(1.34,1.68) | 1.34(1.19,1.51) | 1.33(1.18,1.50) |
Q4 | 839/13,531 | 5.80 | 1.74(1.56,1.95) | 1.47(1.30,1.66) | 1.45(1.28,1.64) |
P for trend |  |  | < 0.0001 | < 0.0001 | < 0.0001 |
Time exposure duration | Â | Â | Â | ||
0 year | 1297/29,549 | 4.07 | 1.00 | 1.00 | 1.00 |
2 years | 630/11,613 | 5.04 | 1.29(1.17,1.42) | 1.18(1.07,1.30) | 1.17(1.06,1.30) |
4 years | 442/7222 | 5.71 | 1.47(1.32,1.64) | 1.30(1.16,1.45) | 1.28(1.14,1.43) |
6 years | 373/5739 | 6.09 | 1.58(1.41,1.77) | 1.33(1.17,1.50) | 1.31(1.15,1.48) |
P for trend |  |  | < 0.0001 | < 0.0001 | < 0.0001 |