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Baseline patient characteristics
| Number of subjects | 1480 |
| Age (yrs, mean ± SD) | 59.2 ± 14.3 |
| Elderly (over 65 yrs) | 40.3% (597) |
| Gender (M/F) | 805/675 |
| First time for endoscopy | 26.6% (402) |
| Lignocaine allergy | 2.1% (31) |
| Antithrombotic therapy | 16.6% (245) |
| Concurrent conditions | |
| Heart disease (arrhythmias, ischemic heart disease) | 28.0% (414) |
| Hypertension | 23.4% (347) |
| Glaucoma | 3.6% (54) |
| Urinary difficulties | 8.6% (128) |
| Diabetes mellitus | 8.1% (119) |
