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Volume 16, Number 10—October 2010
Research

Risk Factors for Pandemic (H1N1) 2009 Virus Seroconversion among Hospital Staff, Singapore

Mark I.C. ChenComments to Author , Vernon J.M. Lee, Ian Barr, Cui Lin, Rachelle Goh, Caroline Lee, Baldev Singh, Jessie Tan, Wei-Yen Lim, Alex R. Cook, Brenda Ang, Angela Chow, Boon Huan Tan, Jimmy Loh, Robert Shaw, Kee Seng Chia, Raymond T.P. Lin, and Yee Sin Leo
Author affiliations: Author affiliations: Tan Tock Seng Hospital, Singapore (M.I.C. Chen, R. Goh, C. Lee, B. Singh, J. Tan, B. Ang, A. Chow, Y.S. Leo); Duke-National University of Singapore Graduate Medical School, Singapore (M.I.C. Chen); Ministry of Defence, Singapore (V.J.M. Lee); World Health Organization Collaborating Centre for Reference and Research on Influenza, Melbourne, Victoria, Australia (I. Barr, R. Shaw); National Public Health Laboratory, Singapore (C. Lin, R.T.P. Lin); National University of Singapore, Singapore (W.-Y. Lim, A.R. Cook, K.S. Chia); DSO National Laboratories, Singapore (B.H. Tan, J. Loh)

Main Article

Table 2

Univariate analysis of occupational risk factors for pandemic (H1N1) 2009 for 531 healthcare workers, Singapore, 2009*

Risk factor No. participants No. (%) seroconverted Crude OR (95% CI) p value
Occupational subgroup
Allied health 116 2 (2) Referent
Nurses 290 28 (10) 6.1 (1.4–26.0) 0.02
Ancilllary and support 69 2 (3) 1.7 (0.2–12.4) 0.60
Administration 35 2 (6) 3.5 (0.5–25.5) 0.22
Doctors
 21
 1 (5)
 2.9 (0.2–32.9)
 0.40
Direct patient contact
No 71 4 (6) Referent
Yes
 460
 31 (7)
 1.2 (0.4–3.5)
 0.73
Primary work area
Nonpatient care areas 83 6 (7) Referent
Inpatient wards 210 20 (10) 1.4 (0.5–3.5) 0.54
Other patient care settings†
 238
 9 (4)
 0.5 (0.2–1.5)
 0.21
Work in high exposure settings
Pandemic (H1N1) 2009 isolation wards 514 31 (6) Referent
No 514 31 (6) Referent
Yes 17 4 (24) 4.8 (1.5–15.6) <0.01
Emergency department 507 33 (7) Referent
No 507 33 (7) Referent
Yes 24 2 (8) 1.3 (0.3–5.8) 0.73
Medical ICU/HDU
No 514 33 (6) Referent
Yes
 17
 2 (12)
 1.9 (0.4–8.9)
 0.39
Contact with patient who had pandemic (H1N1) 2009
No 409 23 (6) Referent
Yes
 122
 12 (10)
 1.8 (0.9–3.8)
 0.10
Contact with sick colleague(s) who had pandemic (H1N1) 2009
No 484 28 (6) Referent
Yes 47 7 (15) 2.9 (1.2–6.9) 0.02

*OR, odds ratio; CI, confidence interval; ICU, intensive care unit, HDU, high-dependency unit.
†Includes allied health and medical staff from departments with both inpatient and outpatient coverage and staff from all other noninpatient departments involved in patient care.

Main Article

Page created: September 07, 2011
Page updated: September 07, 2011
Page reviewed: September 07, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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