Table 1.

Results of a proportional hazards model analysis predicting 214 coronary deaths among 1622 men in 35 years as a function of six risk factors

Risk factor	Coefficient	T Value	Delta for computing hazard ratios	Hazard ratios	95% CI
Age in years	0.0891	6.08	5 years	1.56	1.35 to 1.80
Systolic blood pressure in mm Hg	0.0181	5.18	20 mm Hg	1.44	1.25 to 1.65
Serum cholesterol in mmol/l	0.2668	4.25	1 mmol/l	1.31	1.15 to 1.48
Physical activity score (1, 2, 3)	−0.3218	−3.33	1 score unit	0.72	0.60 to 0.88
Body mass index in kg/m2	0.0025	0.13	3 kg/m2	1.01	0.90 to 1.13
Cigarettes/day	0.0204	2.96	10 cigarettes	1.23	1.07 to 1.40

CI, confidence interval.