Table 1: Total number of appendectomies for suspected acute appendicitis in relation to time periods.
| Time period of operation | |||||
|---|---|---|---|---|---|
| 2003-2005 | 2006-2008 | 2009-2011 | 2012-2014 | Total | |
| Total appendectomies | 282 | 258 | 298 | 302 | 1140 |
| Negative appendectomy rate | 33 (12%) | 42 (16%) | 42 (14%) | 19 (6%) | 136 (12%)* |
| Perforation rate | 60 (21%) | 34 (13%) | 53 (18%) | 66 (22%) | 213 (19%) |
| Preoperative imaging | 39 (14%) | 39 (15%) | 131 (44%) | 264 (87%) | 473 (41%)§ |
| Ultrasound | 32 (11%) | 26 (10%) | 71 (24%) | 176 (58%) | 305 (27%)§§ |
| CT | 13 (5%) | 15 (6%) | 68 (23%) | 137 (45%) | 233 (20%)§§§ |
* = p = 0.029; § = p < 0.001; §§ = p < 0.001; §§§ = p < 0.001.