Table 2

 Relative risk of inadequate sigmoidoscopy by patient and examination characteristics, with and without adjustment for examination limitations

CharacteristicProportion with inadequate sigmoidoscopy (%)Not limitations adjustedLimitations adjusted
RR*95% CIRR*95% CI
CI, confidence interval; RR, relative risk.
*Adjusted for all other variables in table, with or without adjustment for examination limitations.
†Colorectal cancer (CRC) in one first degree relative diagnosed at age 55 years or older.
Age (y)
Endoscopist specialty
    Non-gastroenterologist MD10.01.31.2––1.3
Family history of CRC†
History of prior sigmoidoscopy
Examination limited by