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Volume 25, Number 6—June 2019
Research

Respiratory Syncytial Virus Seasonality, Beijing, China, 2007–2015

Jianxing Yu1, Chunyan Liu1, Yan Xiao1, Zichun Xiang, Hongli Zhou, Lan Chen, Kunling Shen, Zhengde Xie2, Lili Ren2, and Jianwei Wang2Comments to Author 
Author affiliations: National Health Commission Key Laboratory of Systems Biology of Pathogens, Beijing, China (J. Yu, Y. Xiao, Z. Xiang, H. Zhou, L. Chen, L. Ren, J. Wang); Institute of Pathogen Biology of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing (J. Yu, Y. Xiao, Z. Xiang, H. Zhou, L. Chen, L. Ren, J. Wang); Capital Medical University Beijing Children’s Hospital, Beijing (C. Liu, K. Shen, Z. Xie)

Main Article

Table 1

Demographic characteristics of hospitalized children with pneumonia, Beijing, China, July 1, 2007–June 30, 2015, by respiratory syncytial virus year*

Characteristics 2007–08 2008–09 2009–10 2010–11 2011–12 2012–13 2013–14 2014–15 p value
No. patients
718
693
522
650
495
438
427
282

Sex
M 455 (63) 418 (60) 363 (70) 387 (60) 309 (62) 260 (59) 251 (59) 161 (57) 0.003
F
263 (37)
275 (40)
159 (30)
263 (40)
186 (38)
178 (41)
176 (41)
121 (43)

Age, y, median (IQR)
0.7 (0.2–3.8)
0.9 (0.3–3.3)
0.8 (0.2–2.7)
2 (0.6–6.1)
1.4 (0.4–6.1)
2.2 (0.5–7.3)
5 (2.1–8.6)
3.8 (0.6–7.5)
<0.001
Age group, mo† <0.001
1–5 304 (42) 228 (33) 210 (40) 140 (22) 147 (30) 108 (25) 38 (9) 60 (21)
6–11 127 (18) 154 (22) 89 (17) 84 (13) 68 (14) 60 (14) 28 (7) 28 (10)
12–23 54 (8) 94 (14) 71 (14) 104 (16) 69 (14) 48 (11) 39 (9) 19 (7)
24–59 78 (11) 82 (12) 61 (12) 118 (18) 60 (12) 63 (14) 110 (26) 55 (20)
>60
155 (22)
135 (19)
91 (17)
204 (31)
151 (31)
159 (36)
212 (50)
120 (43)

Underlying medical condition 68 (9) 103 (15) 65 (12) 88 (14) 71 (14) 44 (10) 32 (7) 22 (8) <0.001
History of prematurity‡ 8 (1) 23 (3) 24 (5) 36 (6) 29 (6) 27 (6) 22 (5) 13 (5) <0.001
Congenital heart disease§ 49 (7) 76 (11) 38 (7) 47 (7) 38 (8) 13 (3) 10 (2) 7 (2) <0.001
Chronic lung diseases¶ 6 (1) 5 (1) 2 (0) 6 (1) 4 (1) 3 (1) 0 2 (1) 0.700
Anemia# 5 (1) 2 (0) 5 (1) 4 (1) 1 (0) 3 (1) 0 1 (0) 0.424
Malnutrition 5 (1) 2 (0) 2 (0) 3 (0) 0 1 (0) 0 0 0.337
Chromosomal anomalies** 2 (0) 1 (0) 0 0 0 0 0 0 0.441

*Values are no. (%) except where indicated. IQR, interquartile range.
†Some columns do not add up to 100% because of rounding.
‡Prematurity was defined as birth at gestational age <37 weeks.
§Congenital heart disease (defined as International Classification of Diseases, Ninth Revision, codes 745.xx, 746.xx, or 747.xx) was diagnosed at hospital admission.
¶For example, bronchopulmonary dysplasia.
#Moderate to severe anemia, defined as hemoglobin <90 g/L at hospital admission.
**For example, Down syndrome.

Main Article

1These authors contributed equally to this article.

2These senior authors contributed equally to this article.

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Page updated: May 20, 2019
Page reviewed: May 20, 2019
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