Table 9 Reclassification table for risk of CVD incidence between the model with age at quitting, time since quitting and pack-years incorporated into smoking status (Model 4) and a reduced model without age at quitting (Model 3) as the reference model
Model 3 | Model 4 | Â | |||
|---|---|---|---|---|---|
Frequency (Row per cent) | < 6% | 6- < 10% | 10- < 20% | > = 20% | Total |
Participants who experience a CVD Event | Â | Â | Â | Â | Â |
<6% | 164 | 13 | 0 | 0 | 177 |
6- < 10% | 10 | 56 | 12 | 0 | 78 |
10- < 20% | 1 | 5 | 57 | 8 | 71 |
> = 20% | 1 | 0 | 8 | 48 | 57 |
Total | 176 | 74 | 77 | 56 | 383 |
Net gain in reclassification proportion (p-value) | 0.0208(0.2935) | Â | |||
Participants who do not experience a CVD Event | Â | Â | Â | Â | Â |
<6% | 1402 | 85 | 0 | 0 | 1487 |
6- < 10% | 83 | 742 | 64 | 0 | 889 |
10- < 20% | 25 | 84 | 596 | 44 | 749 |
> = 20% | 10 | 2 | 18 | 213 | 243 |
Total | 1520 | 913 | 678 | 257 | 3368 |
Net gain in reclassification proportion (p-value) | 0.0086(0.1545) | Â | |||
NRI (p-value) | 0.0294(0.1558) | Â | |||
Overall net gain in reclassification proportion with respect to risk category > = 20%(p-value) | 0.0015(0.8888) | Â | |||
Overall gross gain in reclassification proportion with respect to risk category > = 20%(p-value) | 0.0339(<0.0001) | Â | |||