Table 1

Features of the teenagers and the mothers by the mothers' HBI statusesa

FeatureHBI mothers (n = 40)Non-HBI mothers (n = 53)P valueb
No.Prop (%)No.Prop (%)
Mothersc
    Education: junior middle school or above3177.53973.50.66
    Occupation: peasant2255.02852.80.50
    Annual family income ≥ 50,000 yuan2665.03260.40.65
    ALT ≥ 40 U/liter25.0611.30.46*
    anti-HBc positive3280.04177.40.76
    anti-HBs positive820.03056.6<0.01
Teenagersd
    Sex (male)2255.03158.50.74
    Vaginal delivery: yes3485.04075.50.26
    Full-term delivery: yes40100.05196.20.50*
    Only breastfeeding up to 6 months: yes3280.04381.10.89
    Normal infantile growth and development: yes3382.54279.20.69
    Passive smoking: yes2255.03464.20.33
    Dental treatment: yes1845.02343.40.88
    History of diseases: yes410.023.80.40*
    History of injury: yes3690.04992.50.72*
    Sharing of toothbrush: yes37.511.90.31*
    Transfusion history: yes25.000.00.18*
    History of surgical operation: yes410.011.90.16*
    Initial HBV vaccine response: yes3485.04686.80.81
    History of booster: yes3485.04177.40.36
    ALT ≥ 40 U/liter12.547.50.46
  • a HBI, hepatitis B virus infection; Prop, proportion; ALT, alanine aminotransferase; anti-HBs, antibody to hepatitis B virus surface antigen; anti-HBc, antibody to hepatitis B virus core antigen.

  • b *, Fisher's exact test.

  • c Age in years (mean ± standard deviation), 38.5 ± 2.4 (HBI mothers) or 39.9 ± 3.9 (non-HBI mothers) (P = 0.04).

  • d Age in years (mean ± standard deviation), 13.7 ± 0.1 (HBI mothers) or 13.7 ± 0.1 (non-HBI mothers) (P = 0.72); birth weight in kilograms (mean ± standard deviation), 3.26 ± 0.40 (HBI mothers) or 3.35 ± 0.37 (non-HBI mothers) (P = 0.26).