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Table 3 Incidence of meningococcal meningitis by culture (n = 10) and serogroup-specific PCR and sequencing (n = 43) among children aged < 5 years old in China, South Korea, and Vietnam by age group, 1999 through 2002 a

From: An expanded age range for meningococcal meningitis: molecular diagnostic evidence from population-based surveillance in Asia

Age (months)   China   Korea   Vietnam
N Incidence rate (95% CI) N Incidence rate (95% CI) N Incidence rate (95% CI)
< 6 5 14.6 (4.5-47.2) 7 27.2 (9.9-74.2) 11 15.5 (3.6-67.2)
7-11 1 3.4 (0.4-33.0) 0 0 9 29.1 (8.0-106.0)
12-23 0 0 2 4.5 (0.8-25.8) 5 13.7 (3.8-50.1)
24-59 0 0 7 4.8 (1.8-13.1) 6 2.4 (0.5-10.2)
overall 6 2.1 (0.7-6.2) 16 6.8 (3.5-13.5) 31 7.4 (3.6-15.3)
  1. aSurveillance periods: China, January 1, 2000--December 31, 2002; South Korea: September 1, 1999--December 31, 2001; Vietnam: March 4, 2000-March 3, 2002
  2. bIncidence rates are shown per 100,000 children; 95% confidence intervals are shown in parentheses.