Table 4.

Multivariate logistic regression analysis

Risk factors	OR (95% CI)	P value
Caring for "Super Spreading Patient" (No = 0: yes = 1)	3.57(1.94~6.57)	<0.001
Avoiding face to face contact while caring for SARS patients
Never	1.00
Sometimes	0.67(0.36~1.24)	>0.05
Often	0.30(0.10~0.90)	<0.05
Every time	0.30(0.15~0.60)	<0.001
Number of pairs of gloves worn (Double = 0: single = 1)	4.13(1.99~8.55)	<0.001
Method of air ventilation in office and SARS ward
Artificial central ventilation	1.00
Natural ventilation	0.40(0.18~0.88)	<0.05
Natural ventilation and additional electronic exhaust fan	0.27(0.16~0.63)	<0.01
Performing tracheal intubations (No = 0: yes = 1)	2.76(1.16~6.53)	<0.05