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Volume 10, Number 5—May 2004

Research

Laboratory Diagnosis of SARS

Paul K.S. Chan*Comments to Author , Wing-Kin To†, King-Cheung Ng*, Rebecca K. Y. Lam*, Tak-Keung Ng†, Rickjason C. W. Chan*Comments to Author , Alan Wu*, Wai-Cho Yu†, Nelson Lee*, David S. C. Hui*, Sik-To Lai†, Ellis K. L. Hon*, Chi-Kong Li*, Joseph J. Y. Sung*, and John S. Tam*
Author affiliations: *The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR, China; †Princess Margaret Hospital, Kowloon, Hong Kong SAR, China

Main Article

Table 4

Positive rates for SARS-CoV for various patient groupsa

SARS-CoV result by RT-PCR/virus isolation
Patient characteristics (n)b
No. (%) of positive patientsc (n = 128)
No. (%) of negative patients (n = 214)
Sex


Female (210)
83 (39.5)
127 (60.5)
Male (132)
45 (34.1)
87 (65.9)
Age group (years)


≤16 (8)
4 (50.0)
4 (50.0)
17–64 (271)
96 (35.4)
175 (64.6)
≥65 (63)
28 (44.4)
35 (55.6)
No. of specimens tested


1–2 (116)
39 (33.6)
77 (66.4)
3–5 (111)
36 (32.4)
75 (67.6)
≥6 (115)
53 (46.1)
62 (53.9)
Time of first specimen collected (weeks after illness onset)


1 (251)
97 (38.6)
154 (61.6)
2 (57)
21 (36.8)
36 (63.2)
3 (11)
4 (36.4)
7 (63.6)
4 (23)
6 (26.1)
17 (73.9)
Disease outcome


Recovered, not requiring ventilation or intensive care (279)
91 (32.6)
188 (67.4)
Recovered after ventilation or intensive care (40)
22 (55.0)
18 (45.0)
Died (23) 15 (65.2) 8 (34.8)

aSARS-CoV, severe acute respiratory syndrome–associated coronavirus.
bOnly patients with their first specimens collected within 4 weeks of onset of illness are included
cPatients with one or more specimen(s) positive for SARS-CoV by RT-PCR and/or virus isolation.

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