Table 3. Age-sex specific rate ratios (with 95% CI) for blue-collar workers and full-time housewives (with respect to white-collar workers).

Age(years)	Women		Men
	Blue-collar workers	Housewives	Blue-collar workers
25–29	5.2 (3.7 to 7.3)	5.1 (3.3 to 7.7)	5.9 (2.5 to 13.5)
30–34	4.9 (3.8 to 6.3)	4.6 (3.4 to 6.0)	3.5 (2.2 to 5.8)
35–39	4.4 (3.6 to 5.4)	4.5 (3.6 to 5.5)	7.1 (4.4 to 11.6)
40–44	3.5 (3.0 to 4.2)	3.6 (3.0 to 4.3)	6.0 (4.0 to 9.2)
45–49	5.0 (4.3 to 5.9)	4.6 (3.9 to 5.4)	4.7 (3.4 to 6.5)
50–54	4.0 (3.4 to 4.7)	3.4 (3.0 to 4.0)	3.6 (2.6 to 5.0)
55–59	3.6 (2.9 to 4.6)	2.9 (2.3 to 3.6)	5.1 (3.4 to 7.6)

All statistical comparisons with white-collar counterparts (reference categories) were highly significant (p<0.001, z test).