Types of computed tomography utilization and contrast medium use
| 2009–2013 (n=38 609) n (%) | 2009 (n=5711) n (%) | 2010 (n=7091) n (%) | 2011 (n=7904) n (%) | 2012 (n=8436) n (%) | 2013 (n=9467) n (%) | p Value | |
|---|---|---|---|---|---|---|---|
| Types of CT | <0.001* | ||||||
| Head | 17 275 (44.74) | 2530 (44.30) | 3272 (46.14) | 3722 (47.09) | 3698 (43.84) | 4053 (42.81) | |
| Spine | 558 (1.45) | 111 (1.94) | 94 (1.33) | 124 (1.57) | 84 (1.00) | 145 (1.53) | |
| Chest | 3864 (10.01) | 578 (10.12) | 739 (10.42) | 728 (9.21) | 899 (10.66) | 920 (9.72) | |
| Abdomen | 14 648 (37.94) | 2098 (36.74) | 2621 (36.96) | 2924 (36.99) | 3280 (38.88) | 3725 (39.35) | |
| Miscellaneous | 2264 (5.86) | 394 (6.90) | 365 (5.15) | 406 (5.14) | 475 (5.63) | 624 (6.59) | |
| Contrast medium use | <0.001* | ||||||
| No | 14 205 (36.79) | 2307 (40.40) | 2553 (36.00) | 2944 (37.25) | 2938 (34.83) | 3463 (36.58) | |
| Yes | 24 404 (63.21) | 3404 (59.60) | 4538 (64.00) | 4960 (62.75) | 5498 (65.17) | 6004 (63.42) | |
| Frequency of CT utilisation | <0.001* | ||||||
| 1 | 37 030 (95.91) | 5519 (96.64) | 6812 (96.07) | 7583 (95.94) | 8127 (96.34) | 8989 (94.95) | |
| 2 | 1514 (3.92) | 188 (3.29) | 264 (3.72) | 307 (3.88) | 297 (3.52) | 458 (4.84) | |
| ≥3 | 65 (0.17) | 4 (0.07) | 15 (0.21) | 14 (0.17) | 12 (0.14) | 20 (0.21) |
Chi-Square test. *p <0.001.
CT, computed tomography.