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Volume 10, Number 6—June 2004
Research

Epidemiologic Clues to SARS Origin in China

Rui-Heng Xu*, Jian-Feng He*, Meirion R. Evans†‡Comments to Author , Guo-Wen Peng*, Hume E Field§, De-Wen Yu*, Chin-Kei Lee¶, Hui-Min Luo*, Wei-Sheng Lin*, Peng Lin*, Ling-Hui Li*, Wen-Jia Liang*, Jin-Yan Lin*, and Alan Schnur#1
Author affiliations: *Guangdong Province Center for Disease Control and Prevention, Guangzhou, China; †University of Wales College of Medicine, Cardiff, United Kingdom; ‡National Public Health Service for Wales, Cardiff, United Kingdom; §Animal Research Institute, Brisbane, Australia; ¶Australian National University, Canberra, Australia; #World Health Organization, Beijing, China

Main Article

Table 5

Case-case comparisons of community SARS patients, Guangdong, China, November 2002–April 2003, according to contact history and onset datea

Exposure (in previous 2 weeks) No contact history (n = 406)
 Contact history (n = 103 )
 OR (95% CI) Early onsetb (n = 19)c
 Late onsetb (n=387)c
 OR (95% CI)
Yes No Yes No Yes No Yes No
Visited hospital
 17
 70
 22
 13
 6.83 (2.89 to 6.73)
 0
 10
 45
 169
 0.00 (0.00 to 1.36)
Visited by a friend
 4
 71
 1
 17
 1.04 (0.04 to 8.93)
 0
 1
 4
 70
 0.00 (0.00 to 337)
Regular hand washing
 122
 15
 44
 3
 1.80 (0.53 to 8.10)
 4
 1
 118
 14
 0.48 (0.06 to 12.55)
Travel history
 45
 179
 13
 62
 0.83 (0.41 to 1.63)
 0
 10
 45
 169
 0.00 (0.00 to 1.36)
Animal contact
 37
 262
 13
 56
 1.64 (0.80 to 3.25)
 1
 3
 36
 259
 2.39 (0.09 to 23.02)
Visited produce market
 9
 79
 1
 19
 0.41 (0.02 to 2.75)
 0
 1
 9
 69
 0.00 (0.00 to 148)
Lives near produce market
 89
 169
 19
 43
 0.84 (0.45 to 1.52)
 5
 0
 84
 169
 Undef. (2.39 to Undef.)
Lives near poultry or livestock farm 6 252 3 59 2.13 (0.42 to 8.81) 0 19 6 247 0.00 (0.00 to 40.15)

aSARS, severe acute respiratory syndrome; CI, confidence interval; OR, odds ratio.
bDefined as November 1, 2002–January 31, 2003, for early onset; February 1, 2003–April 30, 2003, for late onset.
cCases with no contact history and for whom case investigation data are available.

Main Article

1Drs. Evans, Field, and Lee were consultants for the World Health Organization; they assisted in its Beijing office.

Page created: February 22, 2011
Page updated: February 22, 2011
Page reviewed: February 22, 2011
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