Table 3. Logistic regression analysis results.

Objict variable	Dependent variale	Odds ratio	SD	95%confidence interval		P
				Upper	Lower
BOP rate	Age	1.01	0.00	1.01	1.02	1.1×10−8
	Sex	1.92	0.47	0.77	4.79	nsa)
	PCR	1.01	0.41	0.45	2.23	nsa)

^a)ns: not significant.