Table 4

Univariate and multivariate analysis of factors associated with poor bowel preparation (Ottawa score ≥6)

Univariate analysisMultivariate analysis
OR (95% CI)p ValueOR (95% CI)p Value
Constipation
 NoReferenceReference
 Yes1.99 (1.16 to 3.41)0.0131.96 (1.08 to 3.55)0.026
Interval from appointment to colonoscopy
 ≤3 daysReferenceReference
 >3 days1.97 (1.08 to 3.53)0.0361.27 (0.63 to 2.45)0.407
TRE
 YesReferenceReference
 No3.54 (2.11 to 5.93)<0.0012.43 (1.38 to 4.29)0.002
Compliance
 YesReferenceReference
 Incorrect start time6.68 (3.76 to 11.86)<0.0013.50 (1.82 to 6.72)<0.001
 Incorrect diet restriction4.21 (2.11 to 8.39)<0.0012.65 (1.27 to 5.53)0.009
  • TRE, telephone re-education.