Table 5.

Multivariate logistic regression analysis of mucosal perforation

Factor	β	Wald χ²	P value	OR (95% CI)
Complaint time
< 6 h	0.000			1.000
≥ 6 h, < 12 h	0.829	1.932	0.165	2.290 (0.712–7.367)
≥ 12 h, < 24 h	0.946	1.585	0.208	2.575 (0.591–11.226)
≥ 24 h, < 72 h	1.666	9.830	0.002	5.293 (1.868–14.999)
≥ 72 h	3.614	45.395	< 0.01	37.130 (12.975–106.258)
Foreign-body size
< 2 cm	0.000			1.000
2–3 cm	0.738	1.718	0.190	2.092 (0.694–6.307)
≥ 3 cm	1.786	9.909	0.002	5.967 (1.962–18.147)
Foreign-body ends
Free or one impacted end	0.000			1.000
Two or more impacted ends	1.434	13.530	< 0.01	4.197 (1.954–9.014)