Table 3 Operative cohort outcomes

Length of stay (days), mean (SD)

3.1 (2.6)

3.1 (3.0)

0.86

Imaging

No imaging

175 (21.0%)

102 (14.1%)

1.6192 (1.2390–2.1161)

< 0.001

CT

521 (62.5%)

518 (71.6%)

US

137 (16.4%)

102 (14.1%)

MRI

0 (0.0%)

1 (0.1%)

Operation performed

Appendicectomy

764 (91.7%)

653 (90.3%)

0.8012 (0.5652–1.1358)

0.005

Caecectomy

15 (1.8%)

35 (4.8%)

Laparoscopy

22 (2.6%)

11 (1.5%)

Laparotomy

16 (1.9%)

9 (1.2%)

Right Hemicolectomy

16 (1.9%)

15 (2.1%)

Laparoscopic converted to open

No

804 (96.5%)

700 (96.8%)

0.74

Yes

29 (3.5%)

23 (3.2%)

ASA Score

1

383 (46.0%)

267 (37.0%)

0.001

2

358 (43.0%)

349 (48.3%)

3

82 (9.9%)

96 (13.3%)

4

7 (0.8%)

10 (1.4%)

Time from triage to operation (hours), median IQR

12.3 (6.4, 18.3)

14.1 (7.5, 19.1)

0.017

Complicated appendicitis

No

659 (79.1%)

540 (74.7%)

1.2835 (1.0130–1.6262)

0.039

Yes

174 (20.9%)

183 (25.3%)

Normal appendix

No

749 (89.9%)

682 (94.3%)

0.5360 (0.3638–0.7898)

0.001

Yes

84 (10.1%)

41 (5.7%)

Admission WBC (× 10⁹/L), mean (SD)

12.7 (4.8)

12.6 (5.3)

0.67

Admission CRP (mg/L), mean (SD)

48.6 (70.1)

44.2 (64.9)

0.21

Reoperation

No

842 (98.9%)

715 (99.0%)

0.83

Yes

9 (1.1%)

7 (1.0%)

Drain

No

680 (81.6%)

552 (76.3%)

1.3768 (1.0773–1.7596)

0.01

Yes

153 (18.4%)

171 (23.7%)

Post operative complication

No

807 (96.9%)

690 (95.4%)

0.14

Yes

26 (3.1%)

33 (4.6%)

ICU Admission

No

818 (98.2%)

707 (97.8%)

0.85

Operation related

10 (1.2%)

10 (1.4%)

Other

5 (0.6%)

6 (0.8%)

Readmission within 30 days

No

796 (95.6%)

692 (95.7%)

0.58

Operation related

18 (2.2%)

19 (2.6%)

Other

19 (2.3%)

12 (1.7%)

Death

0

0