Table 6.

 Cox proportional hazards model estimating risk of ischaemic stroke in people aged ≥75 with atrial fibrillation who were not taking warfarin

Variable	Hazard ratio	P value
Age (per 5 years)	1.26 (0.93 to 1.72)	0.14
Sex	0.99 (0.57 to 1.70)	0.96
Systolic blood pressure (per 5 mm Hg)	1.01 (0.94 to 1.08)	0.86
Hypertension	1.10 (0.62 to 1.95)	0.74
Diabetes	2.06 (1.07 to 3.98)	0.03
Heart failure	0.78 (0.36 to 1.68)	0.53
Myocardial infarction	0.52 (0.18 to 1.50)	0.22
Angina	1.12 (0.30 to 2.44)	0.79
Valve disease	0.96 (0.58 to 3.13)	0.95
Stroke/TIA	2.59 (1.36 to 4.90)	0.003

TIA=transient ischaemic attack.