Table 3 Risk factors for the primary outcome or stroke from Cox regression models

Risk factor	Level	n	Primary outcome event*	Stroke†
Time since index event	Per day	711	0.99 (0.97 to 1.0)	0.97 (0.94 to 1.0)
TIA or minor stroke in preceding month	Yes	127	2.7 (1.9 to 4.0)	0.82 (0.31 to 2.2)
ABCD² score	0 to 3	210	1.0	1.0
	4 or 5	356	0.89 (0.60 to 1.3)	3.4 (1.0 to 12)
	6 or 7	145	0.93 (0.55 to 1.6)	4.8 (1.3 to 18)
Smoking	Ex	293	1.5 (0.91 to 2.6)	1.8 (0.50 to 6.8)
	Current	230	2.4 (1.5 to 4.1)	4.3 (1.3 to 15)

*Single multifactorial model including all factors (HR (95% CI)).
†Separate multifactorial models each containing the first two factors (HR (95% CI)).
TIA, transient ischaemic attack.