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Table 1 Age and sex distribution of residual sera collected from Guangzhou

From: Population seroprevalence of antibody to influenza A(H7N9) virus, Guangzhou, China

Characteristic

Phase 1 (December 2013 through April 2014) (n = 2660)

Phase 2 (October 2014 through December 2014) (n = 2680)

Age group, years

 0–14

185 (7.0 %)

140 (5.2 %)

 15–24

415 (15.6 %)

445 (16.6 %)

 25–54

1137 (42.7 %)

1166 (43.5 %)

 55–64

340 (12.8 %)

397 (14.8 %)

  ≥ 65

583 (21.9 %)

532 (19.9 %)

Sex

 Male

1336 (50.2 %)

1240 (46.3 %)

 Female

1324 (49.8 %)

1440 (53.7 %)