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Table 1 Baseline characteristics of patients (n = 502)

From: A randomized controlled trial of an educational video to improve quality of bowel preparation for colonoscopy

Characteristic Non-video group Video group P value
No. of patients 252 250  
Sex    0.416
 Male (%) 167 (66.3 %) 157 (62.8 %)  
 Female (%) 85 (33.7 %) 93 (37.2 %)  
Age, mean ± SD 47.3 ± 9.2 49.2 ± 8.6 0.017
BMI, Kg/m2 24.7 ± 3.4 24.3 ± 3.0 0.163
Previous colonoscopy (%)   0.269
 Yes 143 (56.7) 154 (61.6)  
 No 109 (43.3) 96 (38.4)  
Diabetes mellitus 13 (5.2) 22 (8.8) 0.118
Smoking History (%)    0.98
 Non smoker 132 (53.8) 132 (53.0)  
 Past smoker 46 (18.8) 48 (19.3)  
 Current smoker 67 (27.4) 69 (27.7)  
Alcohol History (%)    0.169
 None 71 (29.0) 92 (36.9)  
 Moderate drinking 120 (49.0) 109 (43.8)  
 Heavy drinking 54 (22) 48 (19.3)  
Abdominal operation (%)   0.839
 Yes 34 (13.9) 33 (13.3)  
 No 211 (86.1) 216 (86.7)  
Education level (%)    0.286
  < Middle school 2 (0.8) 4 (1.6)  
 Middle school 7 (2.9) 17 (6.8)  
 High school 90 (36.7) 89 (35.7)  
 Graduate 121 (49.4) 114 (45.8)  
 Postgraduates 25 (10.2) 25 (10.1)  
Annual income level, $ (%)   0.486
  < 10.000 3 (1.2) 7 (2.8)  
 10,000–20,000 7 (2.9) 13 (5.2)  
  > 20,000–30,000 30 (12.2) 29 (11.6)  
  > 30,000–40,000 43 (17.6) 42 (16.9)  
  > 40,000 162 (66.1) 158 (63.5)