Factors | Number of primary appendicectomy performed |
Number with a removal of normal appendix |
% With a removal of normal appendix | p Value |
Primary appendicectomy volume of the admitted hospital | <0.001 | |||
<70 | 1 227 | 153 | 12.5 | |
70–184 | 5 244 | 936 | 17.9 | |
185–350 | 9 335 | 1519 | 16.3 | |
>350 | 27 255 | 4562 | 16.7 | |
Bed size of the admitted hospital | <0.05 | |||
<50 | 3 045 | 456 | 15.0 | |
50–119 | 8 238 | 1331 | 16.2 | |
120–199 | 13 892 | 2365 | 17.0 | |
⩾200 | 17 884 | 3017 | 16.9 | |
Teaching status of the admitted hospital | <0.05 | |||
Teaching | 17 021 | 2924 | 17.2 | |
Non-teaching | 26 038 | 4245 | 16.3 | |
Sex | <0.001 | |||
Male | 23 262 | 2445 | 10.5 | |
Female | 19 799 | 4725 | 23.9 | |
Age (y) | <0.001 | |||
0–14 | 8 728 | 968 | 11.1 | |
15–29 | 17 610 | 2833 | 16.1 | |
30–44 | 9 721 | 1750 | 18.0 | |
⩾45 | 7 002 | 1619 | 23.1 | |
Admission status | <0.001 | |||
Emergent | 32 110 | 4444 | 13.8 | |
Urgent | 8 462 | 1405 | 16.6 | |
Elective | 2 489 | 1321 | 53.1 | |
Comorbidity | <0.001 | |||
No | 40 992 | 6566 | 16.0 | |
Yes | 2 036 | 600 | 29.5 | |
Time to surgery (at individual level) | <0.001 | |||
0 day | 32 752 | 4023 | 12.3 | |
⩾1 day | 10 265 | 3126 | 30.5 | |
Time to surgery (at hospital level; measured by percentage of ⩾1 day to surgery) | <0.001 | |||
<15% | 8 276 | 1502 | 18.2 | |
15% to <18% | 13 100 | 2004 | 15.3 | |
18% to <25% | 14 439 | 2452 | 17.0 | |
⩾25% | 7 246 | 1212 | 16.7 |