Volume 19, Number 6—June 2013
Dispatch
Endemic Norovirus Infections in Children, Ho Chi Minh City, Vietnam, 2009–2010
Phan Vu Tra My, Corinne Thompson, Hoang Le Phuc, Pham Thi Ngoc Tuyet, Ha Vinh, Nguyen Van Minh Hoang, Pham Van Minh, Nguyen Thanh Vinh, Cao Thu Thuy, Tran Thi Thu Nga, Nguyen Thi Thu Hau, James Campbell, Nguyen Tran Chinh, Tang Chi Thuong, Ha Manh Tuan, Jeremy Farrar, and Stephen Baker
Table 1
Baseline characteristics of NoV-positive and NoV-negative case-patients and control participants, Vietnam, 2009–2010*
| NoV positive, n = 241 | NoV negative, n = 1,126 | NoV positive, n = 15 | NoV negative, n = 592 | ||
|---|---|---|---|---|---|
| Male sex |
147 (61.0) |
724 (64.3) |
8 (53.3) |
314 (53.0) |
|
| Mean age, mo (range) |
13.3 (2–45) |
15.8 (1–59) |
15.8 (2.3–52) |
16.8 (0–60) |
|
| Age groups, mo | |||||
| <6 | 24 (10.0) | 165 (14.7) | 3 (20.0) | 98 (16.6) | |
| 7–12 | 102 (42.3) | 375 (33.3) | 4 (26.7) | 208 (35.1) | |
| 13–18 | 76 (31.5) | 245 (21.8) | 3 (20.0) | 113 (19.1) | |
| 19–24 | 25 (10.4) | 147 (13.1) | 3 (20.0) | 56 (9.5) | |
| 24–60 |
14 (5.8) |
194 (17.2) |
2 (13.4) |
117 (19.8) |
|
| Poor Z score† |
18 (7.5) |
73 (6.5) |
1 (6.7) |
75 (12.7) |
|
| Breastfed |
187 (77.6) |
790 (70.2) |
11 (73.3) |
452 (76.4) |
|
| Daily activity | |||||
| Day care/nursery school | 30 (12.5) | 194 (16.4) | 4 (26.7) | 89 (15.2) | |
| Home | 211 (87.6) | 938 (83.6) | 11 (73.3) | 498 (84.8) |
*Values are no. case (%) unless otherwise specified. Case-patients indicate patients who had diarrhea; controls indicate asymptomatic (diarrhea-free) children. Study dates span May 2009–December 2010. NoV, norovirus; WHO, World Health Organization.
†Weight-for-age Z score calculated based on WHO Child Growth Standards guidelines (www.who.int/childgrowth/standards/technical_report/en/); Z score below −2 was considered to indicate that a child was malnourished.
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Page updated: May 20, 2013
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