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Table 2 Age-specific incidences and median age of disease onset from 2009 to 2016

From: Epidemiological changes in measles infections in southern China between 2009 and 2016: a retrospective database analysis

Age group(s)2009
(n = 2246)
2010
(n = 640)
2011
(n = 308)
2012
(n = 1929)
2013
(n = 7032)
2014
(n = 6752)
2015
(n = 2190)
2016
(n = 1265)
Age-specific incidence(s)a (cases per 100,000)
 0–8 months49.2114.904.0162.68279.67254.9976.0337.83
 9–23 months31.0614.233.9031.3095.6079.7324.5114.29
 2–6 years7.181.290.897.1018.4715.625.121.73
 7–15 years1.390.340.170.632.252.441.210.35
 16–24 years1.970.690.420.602.492.540.840.48
 ≥25 years0.640.160.080.481.782.200.780.57
Total2.220.610.291.826.616.302.021.15
Median (IQR) age of
disease onset b
4 years (10 months – 20 years)2 years (10 months
– 21 years)
7 years (14 months
– 22 years)
18 months (8 months
– 8 years)
13 months (8 months
– 10 years)
17 months (8 months
– 23 years)
2 years (8 months
– 24 years)
2 years (8 months
– 27 years)
  1. a Age-specific incidence is expressed as the number of cases reported divided by the population size of the age group
  2. b Only ages < 2 years old were reported by month-age, ages ≥2 years old were reported by whole numbers
  3. IQR Interquartile range