Table 1: Baseline characteristics of patients .

PEG-EL 
CHT 

Age (years) 0.71
Range20–7818–68
Sex0.919
 Male55 (53.9%)50 (53.2%)
 Female47 (46.1%)44 (46.8%)
BMI 0.145
Astriction condition24 (23.53%)32 (32.98%)0.141
Previous colonoscopy experience0.182
 None88 (86.3%)72 (76.6%)
 PEG-EL 13 (12.7%)19 (20.2%)
 CHT1 (0.9%)3 (3.2%)
Consumption of tobacco0.518
 0 (no smoking)78 (76.5%)72 (76.6%)
 1 (<20 cigarettes/day)16 (15.7%)11 (11.7%)
 2 (≥20 cigarettes/day)8 (7.8%)11 (11.7%)
Consumption of alcohol0.419
 1 (alcohol < 50 g/day)99 (97.1%)88 (93.6%)
 2 (alcohol ≥ 50 g/day)3 (2.9%)6 (6.4%)
Reasons for Colonoscopy0.301
 Screening24 (23.5%)23 (24.5%)
 Anemia0 (0.0%)1 (1.1%)
 Hematochezia2 (2.0%)0 (0.0%)
 Body weight loss2 (2.0%)6 (6.4%)
 Abdominal pain or discomfort37 (36.3%)36 (38.3%)
 Constipation6 (5.9%)7 (7.4%)
 Diarrhea12 (11.8%)8 (8.5%)
 Change in bowel habits13 (12.7%)12 (12.8%)
 Follow-up after polyp or polypectomy1 (1.0%)1 (1.1%)
 Follow-up for inflammatory bowel disease5 (4.9%)0 (0.0%)

Data are presented as the mean ± SD or (%).