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Volume 23, Number 2—February 2017

Dispatch

Incidence of Norovirus-Associated Diarrhea, Shanghai, China, 2012–2013

Jianxing Yu1, Chuchu Ye1, Shengjie Lai1, Weiping Zhu, Zike Zhang, Qibin Geng, Caoyi Xue, Weizhong Yang, Shuyu Wu, Aron J. Hall, Qiao SunComments to Author , and Zhongjie LiComments to Author 
Author affiliations: Division of Infectious Disease, Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing, China (J. Yu, S. Lai, Z. Zhang, Q. Geng, W. Yang, Z. Li); Ministry of Health Key Laboratory of Systems Biology of Pathogens and Dr. Christophe Mérieux Laboratory, CAMS-Fondation Mérieux, Institute of Pathogen Biology, Academy of Medical Sciences of China and Peking Union Medical College, Beijing (J. Yu); Research Base of Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Pudong New Area Center for Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Shanghai, China (C. Ye, W. Zhu, C. Xue, Q. Sun); State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China (Z. Zhang); State Key Laboratory of Virology, Wuhan University College of Life Sciences, Wuhan, China (Q. Geng); Centers for Disease Control and Prevention, Beijing, China (S. Wu); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (A.J. Hall)

Main Article

Table 2

Estimated outpatient and community incidence of norovirus-associated diarrhea, by surveillance year, age group of patients, and season, Pudong New Area, Shanghai, China, 2012–2013

Variable Outpatient incidence, 
no. cases/100 person-years (95% CI) Community incidence, 
no. cases/100 person-years (95% CI)
Surveillance year
2012 1.3 (1.2–1.4) 8.1 (7.2–9.0)
2013 1.6 (1.4–1.8) 9.8 (8.7–11.0)
2 y combined
1.5 (1.4–1.6)
8.9 (8.2–9.7)
Age group
0–11 mo 8.4 (5.8–11.6) 20.3 (13.8–27.9)
12–23 mo 6.8 (4.2–9.6) 14.7 (9.2–20.8)
24–59 mo 1.4 (1.0–2.0) 2.5 (1.7–3.5)
5–24 y 1.1 (0.8–1.3) 8.8 (7.0–10.8)
25–44 y 1.0 (0.9–1.1) 13.0 (11.6–14.7)
45–64 y 1.7 (1.5–1.9) 3.2 (2.8–3.6)
>65 y
2.6 (2.0–3.2)
7.8 (6.1–9.5)
Season
Spring, Mar–May 1.2 (1.0–1.4) 7.9 (6.7–9.0)
Summer, Jun–Aug 0.8 (0.7–1.0) 4.9 (3.9–6.0)
Autumn, Sep–Nov 2.3 (2.1–2.5) 13.4 (11.7–15.1)
Winter, Dec–Feb 1.7 (1.4–1.9) 10.5 (8.8–12.3)

Main Article

1These authors contributed equally to this article.

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