| 2006 | 2008 | 2009 | |
|---|---|---|---|
| n | 340 | 484 | 435 |
| Age (years) | 59 | 63 | 59 |
| Male (%) | 44 | 52 | 47 |
| Midazolam (mg) | 5.1±2.5 | 2.8±1.7* | 2.2±1.2* |
| Pethidine (mg) | 36±18 | 28±17* | 31±17* |
| Caecal intubation (%) | 83 | 83 | 86 |
| Polyp (%) | 18 | 32 | 31 |
| Cancer (%) | 3 | 5 | 1 |
| Discomfort (%) | 30 | 22 | 15 |
| Flumazenil (cases) | 2 | 1 | 0 |