Self-reported colorectal cancer screening of Medicare beneficiaries in family medicine vs. internal medicine practices in the United States: a cross-sectional study

Table 3 Unadjusted and adjusted estimates of the association between PCP specialty and CRC screening practices, MCBS 2006-2007 (n = 3,276)

Screening outcomes by PCP specialty	Unadjusted percent (95% CI)	Odds ratios (95% CI)
		Unadjusted	Adjusted
Logistic regression models analyses
Given home FOBT kit
Internists	54.4 (51.2-57.8)	1.00 (ref)	1.00 (ref)
Family physicians	47.5 (44.2-50.9)	0.76 (0.65,0.89)	0.82 (0.69,0.96)
Recommendation for colonoscopy/sigmoidoscopy
Internists	27.1 (22.6-31.5)	1.00 (ref)	1.00 (ref)
Family physicians	18.0 (14.9-21.2)	0.59 (0.44,0.80)	0.64 (0.47,0.86)
Multinomial models analyses with unscreened as common reference group
Had home FOBT within a year
Internists	14.0 (12-15.9)	1.00 (ref)	1.00 (ref)
Family physicians	9.8 (8.4-11.2)	0.59 (0.47-0.74)	0.65 (0.51-0.81)
Had colonoscopy within 5 years
Internists	46.3 (43.4-49.2)	1.00 (ref)	1.00 (ref)
Family physicians	42.7 (39.7-45.8)	0.77 (0.65-0.92)	0.84 (0.71-1.00)
Logistic regression models analyses
Had CRC screening
Internists	60.2 (57.5-63.0)	1.00 (ref)	1.00 (ref)
Family physicians	52.5 (49.6-55.4)	0.73(0.62,0.86)	0.80 (0.68,0.94)

* Adjusted for age, race, ethnicity, sex, marital status, language of the interview, residence in metropolitan service area, education, annual household income, delayed medical care due to cost, supplemental insurance, work status, history of non-skin cancer and general health status

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