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Table 2 Age-specific prevalence of HBsAg (+) among pregnant women born in Taiwan and other Southeast Asia countries

From: Hepatitis B virus infection among pregnant women in Taiwan: Comparison between women born in Taiwan and other southeast countries

  Taiwan Southeast Asia Southeast Asia vs. Taiwan
  HBsAg(+)/Total (%) HBsAg(+)/Total (%) OR (95% CI) P-value
Total 1597/10327 (15.5 %) 126/1418 (8.9 %) 0.53 (0.44–0.65) <0.001
Age (year)     
20 173/1354 (12.8 %) 37/332 (11.1 %) 0.86 (0.59–1.25) 0.420
>20–25 579/3705 (15.6 %) 60/760 (7.9 %) 0.46 (0.35–0.61) <0.001
>25–30 530/3372 (15.7 %) 22/245 (9.0 %) 0.53 (0.34–0.83) 0.005
>30 315/1896 (16.6 %) 7/81 (8.6 %) 0.48 (0.22–1.04) 0.063
Date of birth     
   Before July 1984 1570/10021 (15.7 %) 107/1273 (8.4 %) 0.49 (0.40–0.61) <0.001
before 1970 285/1909 (14.9 %) 3/48 (6.3 %) 0.38 (0.12–1.23) 0.11
1970- before 1978 900/5335 (16.9 %) 34/310 (11.0 %) 0.61 (0.42–0.87) 0.007
1978- before July 1984 385/2777 (13.9 %) 70/915 (7.7 %) 0.52 (0.39–0.67) <0.001
   July, 1984 and after 27/306 (8.8 %) 19/145 (13.1 %) 1.56 (0.84–2.91) 0.163
July, 1984 – June, 1986 24/210 (11.4 %) 17/138 (12.3 %) 1.09 (0.56–2.11) 0.80
July, 1986 and after 3/96 (3.1 %) 2/7 (28.6 %) 12.4 (1.67–91.87) 0.04a
  1. a : P-value of Fisher's exact test