Long-term exposure to air pollution and mammographic density in the Danish Diet, Cancer and Health cohort

Table 3 Odds of having mixed/dense MD and long-term exposure to traffic-related air pollution (NO ₂ per 10 μg/m ³ , NO _x per 20 μg/m ³ ) among 4,769 women

	Model 1 ^a	Model 2 ^b	Model 3 ^c	Model 4 ^d
	OR (95% CI)	OR (95% CI)	OR (95% CI)	OR (95% CI)
All women (n = 4,769)
Baseline NO_x	0.99 (0.96-1.02)	0.97 (0.94-1.00)	0.97 (0.94-1.00)	0.97 (0.94-1.00)
NO_x since 1971	0.98 (0.94-1.02)	0.96 (0.92-1.00)	0.96 (0.92-1.00)	0.96 (0.93-1.01)
Baseline NO₂	0.98 (0.92-1.06)	0.93 (0.86-1.00)	0.92 (0.85-1.00)	0.93 (0.86-1.00)
NO₂ since 1971	0.95 (0.86-1.04)	0.89 (0.80-0.99)	0.89 (0.80-0.99)	0.89 (0.80-0.98)

OR - odds ratio; CI - confidence interval; ^aadjusted for age; ^badjusted for Model 1 and BMI, HRT status, HRT duration, number of children; ^cadjusted for Model 2 and alcohol use, alcohol intake (g/day), physical activity, education level; ^dadjusted for Model 3 and smoking status, smoking duration, smoking intensity (g/day).

ISSN: 1476-069X