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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Clin Gastroenterol Hepatol. 2015 Feb 28;13(8):1487–1495. doi: 10.1016/j.cgh.2015.02.038

TABLE 4.

Relative risks for undergoing colonoscopy among individuals 40 to 49 years of age.*

Variable Underwent colonoscopy (N = 85,782) Relative risk [95% CI]

Physician recommended CRC screening:
 No 16738 (19.5%) reference
 Yes 69044 (63.7%) 4.08 [1.99–8.53]

Race/ethnicity:
 White 66976 (51.6%) reference
 African American 2347 (14.9%) 0.29 [0.04–0.87]
 Latino 8371 (30.2%) 0.67 [0.15–1.94]
 Asian 3711 (30.7%) 0.85 [0.20–1.80]
 Other 4377 (49.5%) 1.02 [0.06–2.51]

Sex:
 Female 39478 (40.5%) reference
 Male 46304 (47.8%) 1.05 [0.66–1.95]

Marital Status:
 Unmarried 37733 (54.2%) reference
 Married 48049 (38.6%) 0.57 [0.38–0.89]

Years lived in the United States:
 Born in the United States 54099 (39.9%) reference
 < 1 – 14 1224 (22.0%) 0.38 [0.04–1.15]
 ≥ 15 30459 (57.5%) 1.23 [0.48–4.31]

English proficiency:
 Not at all or not well 6470 (36.0%) reference
 Only or very well or well 79312 (45.0%) 1.26 [0.48–10.0]

Self-reported health status:
 Poor or fair 31611 (65.9%) reference
 Good or very good 41013 (37.3%) 0.59 [0.41–1.04]
 Excellent 13158 (36.3%) 0.45 [0.24–0.80]

Work status:
 Not working 33812 (50.8%) reference
 Currently working 51970 (40.7%) 0.92 [0.57–2.17]

Education level:
 Did not graduate from HS 8506 (39.4%) reference
 HS degree 23281 (30.5%) 0.97 [0.46–8.82]
 College degree 41262 (64.0%) 1.79 [0.71–32.9]
 Graduate degree 12733 (40.2%) 1.02 [0.44–13.1]

Federal poverty level (FPL):
 ≥ 300% FPL 47518 (44.1%) reference
 200 – 299% FPL 3904 (23.0%) 0.55 [0.16–1.09]
 100 – 199% FPL 23575 (50.0%) 1.27 [0.41–4.66]
 0 – 99% FPL 10785 (48.3%) 1.07 [0.49–3.82]

Insurance status:
 No insurance 19073 (45.1%) reference
 Has insurance 66709 (43.9%) 8.62 [1.06–200.9]

Usual source of care (USOC):
 No USOC 8095 (35.0%) reference
 Has USOC 77687 (45.4%) 1.22 [0.53–7.20]

Data are presented as n (%) or relative risk [95% CI].

CI, confidence interval; CRC, colorectal cancer; HS; high school.

*

Relative risk analysis performed on estimates from a logistic regression model with survey weights. All variables in the table as well as household size were included in the model.

Performed within past 5 years.

One or more parameters could not be estimated in 205 bootstrap replicates; therefore estimates are from 1795 bootstrap replicates.