Table 8.

Reclassification table for risk of CVD incidence between the model with age at quitting incorporated into smoking status (Model 2) and the model with a current/non-smoker smoking measure (Model 1) as the reference model

Model 1	Model 2
Frequency (Row per cent)	<6%	6-<10%	10-<20%	> = 20%	Total
Participants who experience a CVD Event
<6%	158	16	0	0	174
6-<10%	8	53	12	0	73
10-<20%	0	5	60	6	71
> = 20%	0	0	8	57	65
Total	166	74	80	63	383
Net gain in reclassification proportion (p-value)	0.0339(0.0796)
Participants who do not experience a CVD Event
<6%	1750	53	0	0	1803
6-<10%	75	469	67	0	611
10-<20%	0	79	499	36	614
> = 20%	0	0	60	280	340
Total	1825	601	626	316	3368
Net gain in reclassification proportion (p-value)	0.0172(0.0025)
NRI (p-value)	0.0511(0.0112)
Overall net gain in reclassification proportion with respect to risk category > = 20%(p-value)	0.0019(0.8518)
Overall gross gain in reclassification proportion with respect to risk category > = 20%(p-value)	0.0263(<0.0001)