Clinical significance of peri-appendiceal abscess and phlegmon in acute complicated appendicitis patients undergoing emergency appendectomy

Table 3 Cox regression analyses for postoperative length of hospital stay

Characteristic	Length of hospital stay (d)	Hazard radio (95%CI)	P value
Age (years)1			0.913
≤ 60	6.0 (4.0, 8.0)	1.000 (reference)
> 60	6.0 (4.0, 8.0)	0.997 (0.946-1.050)
Sex			0.327
Male	6.0 (4.0, 8.0)	1.000 (reference)
Female	6.0 (4.0, 8.0)	1.027 (0.974-1.083)
Temperature			0.745
≤ 37 °C	6.0 (4.0, 7.0)	1.000 (reference)
> 37 °C	6.0 (4.0, 8.0)	1.009 (0.954-1.068)
WBC count, × 109/L			0.981
≤ 9.5	6.0 (4.0, 7.0)	1.000 (reference)
> 9.5	6.0 (4.0, 8.0)	1.001 (0.945-1.060)
Granulocyte percentage			0.097
≤ 80%	5.0 (3.0, 7.5)	1.000 (reference)
> 80%	6.0 (4.0, 8.0)	1.081 (0.986-1.185)
Duration of symptoms			< 0.001
≤ 72 h	5.0 (4.0, 7.0)	1.000 (reference)
> 72 h	7.0 (5.0, 10.0)	1.208 (1.107-1.319)
Appendicolith			0.699
No	6.0 (4.0, 8.0)	1.000 (reference)
Yes	6.0 (4.0, 8.0)	1.010 (0.959-1.064)
Peri-appendiceal			< 0.001
Phlegmon	5.0 (4.0, 7.0)	1.000 (reference)
Abscess	6.0 (5.0, 8.0)	1.217 (1.095-1.352)

¹Split at median.