Table 3.

Risk factors by multivariate logistic regression analysis.

	Odds ratio	95% CI (lower–upper)	P-value
Hemoglobin	1.004	0.993–1.016	0.481
Platelet count	1.002	1.001–1.003	0.004
CRP	0.990	0.980–1.000	0.054
Distance	1.031	1.001–1.062	0.044