Table 2.

Hazard ratios for MI according to health metric score* by sex

Health metrics	Men, n = 10,537				Women, n = 11,584
score	%†	No. of MI	IR‡	HR (95 % CI)§	%†	No. of MI	IR‡	HR (95 % CI)§
= 0	0.2	6	2653	Ref	0.3	6	928	Ref
= 1	7.9	182	1715	0.63 (0.28, 1.43)	6.3	100	617	0.65 (0.28, 1.47)
= 2	28.9	343	821	0.30 (0.14, 0.68)	25.8	251	312	0.33 (0.15, 0.73)
= 3	35.8	382	671	0.25 (0.11, 0.56)	30.9	185	224	0.23 (0.10, 0.53)
= 4	19.9	130	460	0.17 (0.07, 0.39)	22.0	52	126	0.13 (0.06, 0.30)
= 5	6.4	12	170	0.06 (0.02, 0.17)	11.0	2	18	0.02 (0.00, 0.09)
= 6	1.0	1	109	0.04 (0.00, 0.34)	3.6	0	0	NA
Overall||	100	1056	633	0.65 (0.61, 0.70)	100	596	201	0.59 (0.54, 0.64)

MI, myocardial infarction; IR, incidence rate, HR, hazard ratio; CI confidence interval.

*Health Metric Score is defined as the number of ideal health levels for six cardiovascular disease risk factors.

1) Body Mass Index < 25 kg/m².

2) Total cholesterol < 5.18 mmol/l (<200 mg/dl).

3) Systolic blood pressure < 120 mmHg and diastolic blood pressure < 80 mmHg.

4) Non-smokers.

5) Moderate physical activity ≥ 3 hours per week or vigorous physical activity ≥ 1 hours per week.

6) Non – Diabetes.

†Percent of participants.

‡Age adjusted incidence rate per 100,000 person-years from poisson regression.

§Age adjusted Cox proportional hazard regression models with updated values of health metrics score during follow-up using participants with score ≤ 1 as the reference level.

||HR per unit increase in health metric score.

The Tromsø Study 1994–2008.