Table 4.

Estimated Odds Ratios of Women Reporting Colonoscopy Screening by Selected Study Characteristics and Region of Residence

	Adjusted OR (95% CI)
Characteristics	Northeast	South	Midwest	West
Age, y
50–54	1.00	1.00	1.00	1.00
55–59	1.15 (0.93–1.41)	1.05 (0.84–1.29)	1.08 (0.87–1.33)	1.31 (1.05–1.64)
60–64	1.25 (0.97–1.60)	1.26 (0.96–1.63)	1.41 (1.09–1.81)	1.17 (0.90–1.53)
≥65	1.22 (0.92–1.60)	1.06 (0.79–1.42)	1.31 (0.98–1.74)	1.13 (0.84–1.52)
Education, y
≤12	1.00	1.00	1.00	1.00
13–15	1.13 (0.89–1.44)	1.35 (1.04–1.75)	1.41 (1.11–1.79)	0.86 (0.65–1.14)
≥16	1.16 (0.94–1.41)	1.37 (1.11–1.69)	1.56 (1.25–1.93)	0.92 (0.71–1.20)
Marital status
Single	1.00	1.00	1.00	1.00
Married/living as married	1.15 (0.86–1.53)	1.27 (0.90–1.79)	0.85 (0.58–1.24)	1.22 (0.83–1.78)
Separated/divorced/widowed	1.18 (0.89–1.57)	1.03 (0.73–1.45)	0.73 (0.50–1.06)	1.28 (0.87–1.87)
Body mass index (kg/m2)
<25	1.00	1.00	1.00	1.00
25–29	1.02 (0.82–1.27)	0.84 (0.66–1.07)	1.15 (0.91–1.45)	0.98 (0.77–1.24)
≥30	1.01 (0.81–1.28)	0.56 (0.29–1.08)	0.98 (0.77–1.25)	1.05 (0.82–1.34)
Current hormone use
No	1.00	1.00	1.00	1.00
Yes	1.78 (1.46–2.17)	1.59 (1.32–1.92)	1.58 (1.31–1.90)	1.26 (1.03–1.53)
Health insurance
No	1.00	1.00	1.00	1.00
Yes	2.27 (1.49–3.44)	2.92 (1.31–2.80)	2.17 (1.39–3.37)	1.74 (1.05–2.85)
Alcohol (No .of drinks/week)
<1	1.00	1.00	1.00	1.00
1–6	1.10 (0.91–1.33)	1.22 (1.01–1.48)	0.97 (0.80–1.18)	1.00 (0.81–1.23)
≥7	1.30 (0.97–1.73)	1.04 (0.75–1.44)	1.26 (0.91–1.73)	1.08 (0.79–1.46)
Smoking status
Never	1.00	1.00	1.00	1.00
Ever	0.79 (0.63–0.99)	0.90 (0.71–1.15)	0.69 (0.54–0.86)	1.00 (0.77–1.30)
Mammography
No	1.00	1.00	1.00	1.00
Yes	3.13 (2.32–4.20)	2.48(1.86–3.30)	2.13 (1.59–2.86)	3.25 (2.21–4.78)
Strenuous physical activity hours/week)
0	1.00	1.00	1.00	1.00
≤2	1.09 (0.88–1.33)	1.04 (0.84–1.28)	1.24 (1.01–1.52)	0.95 (0.77–1.19)
>2	1.28 (0.96–1.70)	1.52 (1.11–2.07)	1.28 (0.95–1.72)	1.41 (1.05–1.88)

Abbreviations: CI, confidence interval; OR, odd ratio.