Table 1

Crude odds ratios and 95% confidence intervals for factors associated with risk of coronary events in Newcastle, Australia and Auckland, New Zealand

		Newcastle 1988/89				Newcastle 1992–94				Auckland 1986–88
		Cases (n = 367) (%)	Controls (n = 1081) (%)			OR	95% CI			Cases (n = 283) (%)	Controls (n = 1171) (%)	OR	95% CI	Cases (n = 303) (%)	Controls (n = 937) (%)	OR	95% CI
Passive smoking
No	72.2	70.3	1.00			70.3	72.8	1.00			72.3	78.2	1.00
Yes	27.8	29.7	0.91	0.70–1.19		29.7	27.2	1.13	0.85–1.50		27.7	21.8	1.38	1.03–1.85
Sex
Male	70.3	44.3	1.00			70.0	46.5	1.00			75.9	57.1	1.00
Female	29.7	55.7	0.34	0.26–0.43		30.0	53.5	0.37	0.28–0.49		24.1	42.9	0.42	0.32–0.57
Age group
35–49	6.3	34.5	0.10	0.06–0.15		7.9	30.7	0.18	0.11–0.30		19.8	28.4	0.42	0.30–0.60
50–54	7.9	12.6	0.42	0.26–0.66		9.2	12.9	0.51	0.31–0.84		15.8	19.9	0.49	0.34–0.72
55–59	14.4	13.9	0.69	0.47–1.02		13.4	12.8	0.75	0.49–1.17		22.1	25.7	0.53	0.38–0.75
60–64	29.4	19.5	1.00			28.6	20.6	1.00			42.2	26.0	1.00
65–69	42.0	19.5	1.43	1.04–1.95		41.0	23.0	1.28	0.92–1.80
History of CHD
No	54.8	91.6	1.00			58.3	91.1	1.00			56.1	93.9	1.00
Yes	45.2	8.4	8.98	6.67–12.09		41.7	8.9	7.34	5.38–10.01		43.9	6.1	12.0 8	8.50–17.16
Education
Primary or high school	79.3	71.0	1.00			71.4	63.6	1.00			52.1	35.2	1.00
Technical college	12.3	17.8	0.62	0.43–0.88		23.3	23.5	0.89	0.65–1.21		25.1	22.5	0.75	0.55–1.03
University	5.7	11.3	0.45	0.28–0.73		4.2	12.8	0.30	0.16–0.54		22.8	29.0	0.53	0.38–0.73
Unknown	2.7	0.0				1.1	0.1
Body mass index
<25	39.2	34.3	1.00			33.2	31.1	1.00			45.5	58.3	1.00
25–30	39.8	45.4	0.77	0.59–1.00		40.3	43.9	0.86	0.63–1.16		38.6	33.1	1.49	1.13–1.98
>30	16.3	19.7	0.73	0.52–1.02		23.7	25.0	0.89	0.64–1.22		15.9	8.1	2.50	1.66–3.75
Unknown	4.6	0.6				2.8	0.0				0.0	0.5

CHD = coronary heart disease.
OR = odds ratios; CI = confidence intervals.