Table 5 Cox proportional hazards regression model for an acute ischaemic event following a C-reactive protein (CRP) observation

Variables in the equation	β	SE	p	HR	95% CI for HR
Variables in the equation	β	SE	p	HR	Lower	Upper
Demographics
Male gender	0.101	0.162	0.533	1.11	0.80	1.52
Age (years)	0.042	0.006	<0.001	1.04	1.03	1.05

Prior diagnoses
Prior vascular disease	0.015	0.165	0.928	1.01	0.73	1.40

CRP change category (cf. normal→normal)
Elevated→normal	0.767	0.782	0.327	2.15	0.46	9.97
Normal→elevated	1.046	0.769	0.174	2.85	0.63	12.85
Elevated→elevated	1.211	0.713	0.089	3.36	0.83	13.58