Volume 16, Number 10—October 2010
Research
Risk Factors for Pandemic (H1N1) 2009 Virus Seroconversion among Hospital Staff, Singapore
Mark I.C. Chen
, Vernon J.M. Lee, Ian G. 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
, Vernon J.M. Lee, Ian G. 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 LeoTable 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.
