Table 2

Summary of the interrupted time series analysis for appendicectomy and laparoscopic appendicectomy rate of the 5 pre-pandemic years compared with the rates after the first pandemic wave

Appendicectomy
AllSimpleComplex
OR (95% CI)P valueOR (95% CI)P valueOR (95% CI)P value
Under-5s
Month counter (A)0.99 (0.98 to 1.00)0.025*0.99 (0.97 to 1.00)0.06740.99 (0.98 to 1.01)0.312
COVID-19 flag (B)0.39 (0.19 to 0.80)0.0102*1.00 (0.19 to 5.18)0.99790.22 (0.08 to 0.59)0.0028*
A×B1.08 (0.95 to 1.23)0.22490.92 (0.70 to 1.19)0.51191.18 (0.98 to 1.43)0.0783
5–9s
Month counter (A)0.99 (0.99 to 0.99)<0.0001*1.00 (0.99 to 1.00)0.25940.99 (0.98 to 1.00)0.0229*
COVID-19 flag (B)0.33 (0.24 to 0.45)<0.0001*0.50 (0.29 to 0.85)0.0106*0.37 (0.18 to 0.75)0.006*
A×B1.10 (1.04 to 1.16)0.001*1.04 (0.95 to 1.14)0.39561.20 (1.04 to 1.39)0.0121*
10–24s
Month counter (A)0.99 (0.99 to 0.99)<0.0001*0.99 (0.98 to 0.99)<0.0001*0.99 (0.99 to 1.00)0.0013*
COVID-19 flag (B)0.31 (0.27 to 0.36)<0.0001*0.25 (0.20 to 0.31)<0.0001*0.68 (0.46 to 0.99)0.0437*
A×B1.05 (1.03 to 1.08)<0.0001*1.06 (1.02 to 1.10)0.001*1.02 (0.96 to 1.09)0.5334
Laparoscopic appendicectomy
Under-5sOR (95% CI)P valueOR (95% CI)P valueOR (95% CI)P value
Month counter (A)1.02 (1.02 to 1.03)<0.0001*1.03 (1.02 to 1.04)<0.0001*1.02 (1.02 to 1.03)<0.0001*
COVID-19 flag (B)2.53 (1.23 to 5.23)0.0118*3.96 (0.83 to 18.89)0.08472.16 (0.92 to 5.02)0.0753
A×B1.11 (0.97 to 1.28)0.12721.03 (0.77 to 1.36)0.85731.15 (0.98 to 1.36)0.0822
5–9s
Month counter (A)1.02 (1.02 to 1.02)<0.0001*1.02 (1.02 to 1.02)<0.0001*1.02 (1.02 to 1.02)<0.0001*
COVID-19 flag (B)3.97 (3.18 to 4.95)<0.0001*3.40 (2.50 to 4.62)<0.0001*4.76 (3.35 to 6.78)<0.0001*
A×B0.98 (0.94 to 1.02)0.25190.98 (0.93 to 1.03)0.48110.97 (0.91 to 1.03)0.3034
10–24s
Month counter (A)1.02 (1.02 to 1.02)<0.0001*1.02 (1.02 to 1.03)<0.0001*1.02 (1.02 to 1.02)<0.0001*
COVID-19 flag (B)2.83 (2.43 to 3.30)<0.0001*2.89 (2.35 to 3.54)<0.0001*3.23 (2.47 to 4.22)<0.0001*
A×B1.03 (1.01 to 1.06)0.0192*1.03 (0.99 to 1.07)0.10371.03 (0.98 to 1.08)0.1833
  • *, p<0.05.