Table 2.
Head-to-head comparison of water vs. air method in screening colonoscopy patients
| Air (n=191) | Water (n=177) | p* | |
| Age (years) | 59.3±0.5 | 60.0±0.5 | n.s. |
| Gender (male/female) | 184/7 | 171/6 | n.s. |
| BMI | 29.9±0.4 | 30.1±0.4 | n.s. |
| Current smokers | 68 of 191 (35.6%) | 44 of 174 (25.3%) | 0.03 |
| Proportion of current smokers with adenomas | 33 of 68 (48.5%) | 24 of 44 (54.5%) | 0.56 |
| Current 3occasional alcohol drinkers | 73 of 191 (38.2%) | 78 of 177 (44.1%) | 0.289 |
| Proportion of current 3occasional alcohol drinkers with adenomas | 34 of 73 (46.6%) | 45 of 78 (57.7%) | 0.19 |
| ITT cecal intubation | 100% | 92% | n.s. |
| Final cecal intubation | 100% | 99.4% | n.s. |
| Time to cecum (min) | 5.3±0.3 | 6.9±0.3 | <0.0001 |
| Withdrawal time (min) | 13.7±0.5 | 12.9±0.4 | n.s. |
| Total time (min) | 18.9±0.6 | 19.9±0.5 | n.s. |
| External pressure; n (%) | 54 (28.3%) | 21 (11.9 %) | <0.0001 |
| Change in position | 22 (11.5 %) | 14 (7.9 %) | n.s. |
| Fair-adequate or fair-compromised prep | 41 (21.5%) | 28 (15.8%) | n.s. |
| Good or Excellent prep | 150 (78.5%) | 149 (84.2%) | n.s. |
| Fair-adequate or fair-compromised tolerance | 14 (7.3%) | 12 (6.8%) | n.s. |
| Good or Excellent tolerance | 177 (92.7%) | 165 (93.2%) | n.s. |
| Fentanyl dose (mg) | 76.5±1.7 | 68.8±1.4 | 0.0006 |
| Midazolam dose (mg) | 3.1±0.1 | 2.8±0.1 | 0.0007 |
| Added sedation | 52 (27.2%) | 31 (17.5%) | 0.03 |
Data are mean ± SEM and frequency count (%).
*
Student's t test or Fisher's exact test.