Table 1.

Participant Characteristics by Bowel Preparation Quality (n = 2,016)

Inadequate PreparationAdequate Preparation
(±SD) or n (%)(±SD) or n (%)
CharacteristicsTotal n = 119Total n = 1,897
Age, years
 Mean (±SD)61.5 (±7.4)62.9 (±8.0)
Age
 <6052 (7.0)695 (93.0)
 ≥60.067 (5.3)1,202 (94.7)
BMI (±SD)29.8 (±7.8)28.7 (±6.4)
BMI
 <30.073 (5.6)1,233 (94.4)
 ≥30.045 (6.4)662 (93.6)
Site
 UI76 (9.1)761 (90.9)
 UNC33 (4.2)749 (95.8)
 TTUHSC10 (2.5)387 (97.5)
Sex
 Female68 (5.3)1,206 (94.7)
 Male51 (6.9)691 (93.1)
Race
 Black10 (7.2)129 (92.8)
 White100 (5.9)1,587 (94.1)
 Others9 (4.7)181 (95.3)
Ethnicity
 Hispanic11 (2.9)370 (97.1)
 Non-Hispanic/unknown108 (6.6)1,527 (93.4)
Education
 ≤8th grade3 (3.9)75 (96.2)
 HS/GED25 (6.5)359 (93.5)
 College or higher90 (5.9)1,447 (94.1)
 Not reported1 (5.9)16 (94.1)
Income
 <$40,00047 (8.2)525 (91.8)
 $40,000–<$80,00021 (4.6)436 (95.4)
 ≥$80,00047 (5.2)858 (94.8)
 Not reported4 (4.9)78 (95.1)
Current Smoker
 Yes13 (12.3)93 (87.7)
 No106 (5.6)1,796 (94.4)
Unevaluable FIT
 Yes2 (2.7)73 (97.3)
 No117 (6.0)1,824 (94.0)
Colonoscopy type
 Screening74 (5.6)1,252 (94.4)
 Surveillance45 (6.5)645 (93.5)
Clock drawing test Watson
 Abnormal37 (6.9)500 (93.1)
 Normal82 (5.5)1,397 (94.5)
Clock drawing test Mendes
 Abnormal32 (7.6)389 (92.4)
 Normal87 (5.5)1,508 (94.6)
  • Abbreviations: SD, standard deviation; HS, high school; GED, General Equivalency Development; FIT, fecal immunochemical test; UI, University of Iowa; UNC, University of North Carolina; TTUHSC, Texas Tech University Health Sciences Center.