Table 2

Effect of PEP on the outcome of bowel preparation and patient-related factors

Control arm (n=151)PEP arm (n=149)P value
BBPS score >5, n (%)79 (52.3)147 (98.7)<0.001*
BBPS score, median58<0.001†
 Right (ascending colon) score, n (%)12<0.001†
 Transverse colon score, n (%)23<0.001†
 Left (descending colon) score, n (%)23<0.001†
Presence of polyps, n (%)19 (12.6)64 (42.3)<0.001*
No of polyps, n (%)<0.001*
 16 (4.0)29 (19.6)
 22 (1.3)4 (2.7)
 >211 (7.3)31 (20.9)
Compliance: able to complete, n (%)129 (85.4)144 (96.6)<0.001*
Acceptability: ease of ingestion, n (%)50 (33.1)133 (89.3)<0.001*
Tolerability: moderate to severe, n (%)
 Unpleasant taste, n (%)104 (68.9)27 (18.1)<0.001*
 Nausea/vomiting, n (%)49 (32.5)20 (13.4)<0.001*
 Bloating, n (%)90 (59.6)105 (70.5)0.048*
 Abdominal pain/cramps, n (%)49 (32.5)20 (13.4)<0.001*
 Lack of sleep, n (%)62 (41.1)42 (28.2)0.019*
Willingness to repeat regime, n (%)118 (79.1)149 (100.0)<0.001*
  • *Pearson χ2 test.

  • †Mann-Whitney U test.

  • BBPS, Boston Bowel Preparation Scale; PEP, patient educational package.