Table 2.

Follow-up colonoscopy after abnormal flexible sigmoidoscopy (FSG) by race and highest education attained

Characteristic	No. of patients with abnormal FSG	No. of patients without follow-up colonoscopy	No. of patients who had follow-up colonoscopy	Percentage with follow-up colonoscopy (95% CI)	Relative risk of undergoing follow-up colonoscopy (95% CI)*
White (all)	13 743	3799	9944	72 (72% to 73%)	1.0 (reference)
Black (all)	767	287	480	63 (59% to 66%)	0.88 (0.83 to 0.93)
High school or less (all)	6260	1730	4530	72 (71% to 74%)	1.0 (reference)
College (all)	5760	1659	4101	71 (70% to 72%)	1.01 (0.99 to 1.03)
Postgraduate (all)	2490	697	1793	72 (70% to 74%)	1.00 (0.98 to 1.03)
White, high school or less	5888	1570	4318	73 (72% to 75%)	1.0 (reference)
Black, high school or less	372	160	212	57 (52% to 62%)	0.83 (0.75 to 0.91)
White, college	5470	1567	3903	71 (70% to 73%)	1.0 (reference)
Black, college	290	92	198	68 (63% to 74%)	0.93 (0.86 to 1.01)
White, postgraduate	2385	662	1723	72 (70% to 74%)	1.0 (reference)
Black, postgraduate	105	35	70	67 (57% to 76%)	0.92 (0.80 to 1.05)

^*Multivariable models included race (white or black), educational status (high school or less, some college or college graduates, or postgraduate education), age (55–59, 60–64, 65–69, or 70–74 years), sex (male or female), body mass index (<18.5, 18.5–24, 25–29, ≥30, or unknown), smoking status (never, former, or current), family history of colorectal cancer (yes, no, or unknown), history of colorectal cancer screening within 3 years of enrollment (yes, no, or unknown), history of colon polyps (yes, no, or unknown), and screening center (10 categories). CI = confidence interval.