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Volume 10, Number 2—February 2004
2004 SARS Edition

SARS Transmission

Risk Factors for SARS among Persons without Known Contact with SARS Patients, Beijing, China

Jiang Wu*, Fujie Xu†‡1, Weigong Zhou†‡1, Daniel R. Feikin†‡1, Chang-Ying Lin*, Xiong He*, Zonghan Zhu§, Wannian Liang§¶, Daniel P. Chin†, and Anne Schuchat†‡1Comments to Author 
Author affiliations: *Beijing Center for Disease Prevention and Control, Beijing, China; †World Health Organization–China Office, Beijing, China; ‡Centers for Disease Control and Prevention, Atlanta, Georgia, USA; §Beijing Municipal Health Bureau, Beijing, China; ¶Beijing Joint SARS Expert Group, Beijing, China; 1These authors served as temporary advisors to the World Health Organization–China Office SARS team

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Table 2

Factors significantly associated with acquisition of clinically diagnosed SARS in multivariate analysisa

Potential risk or protective factor for SARS Matched OR (95% CI)b p value
Healthcare related
Visited any fever clinicc 12.7 (3.1 to 52.0) <0.001
Having any chronic diseased 4.8 (1.7 to 13.2) 0.002
Visited any farmer’s market 0.4 (0.2 to 0.8) 0.01
Eating out
Never Reference
Once a week 1.6 (0.7 to 3.8) 0.3
More than once a week 3.1 (1.2 to 7.7) 0.02
Taking a taxi
Never Reference
Once a week 0.2 (0.1 to 0.8) 0.02
More than once a week 3.0 (0.9 to 10.3) 0.07
Had a pet 0.4 (0.2 to 0.9) 0.03
Wore a mask when going out
Never Reference
Sometimes 0.4 (0.2 to 0.9) 0.03
Always 0.3 (0.1 to 0.6) 0.002

aOR, odds ratio; CI, confidence interval; SARS, severe acute respiratory syndrome.
bFever clinics were established for triage of patients who might have SARS to separate them from other persons being evaluated in emergency rooms or outpatient clinics.

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