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Journal Article
Observational Study
Trends in the prevalence of hepatitis B infection among women giving birth in New South Wales.
Medical Journal of Australia 2017 April 18
OBJECTIVES: To evaluate the effect of targeted and catch-up hepatitis B virus (HBV) vaccination programs in New South Wales on HBV prevalence among women giving birth for the first time.
DESIGN: Observational study linking data from the NSW Perinatal Data Collection for women giving birth during 2000-2012 with HBV notifications in the NSW Notifiable Conditions Information Management System.
MAIN OUTCOME MEASURES: HBV prevalence in Indigenous Australian, non-Indigenous Australian-born, and overseas-born women giving birth.
RESULTS: Of 482 944 women who gave birth to their first child, 3383 (0.70%) were linked to an HBV notification. HBV prevalence was 1.95% (95% CI, 1.88-2.02%) among overseas-born women, 0.79% (95% CI, 0.63-0.95%) among Indigenous Australian women, and 0.11% (95% CI, 0.09-0.12%) among non-Indigenous Australian-born women. In Indigenous Australian women, prevalence was significantly lower for those who had been eligible for inclusion in the targeted at-risk newborn or universal school-based vaccination programs (maternal year of birth, 1992-1999: 0.15%) than for those who were not (born ≤ 1981: 1.31%; for trend, P < 0.001). There was no statistically significant downward trend among non-Indigenous Australian-born or overseas-born women. HBV prevalence was higher among Indigenous women residing in regional and remote areas than those in major cities (adjusted odds ratio [aOR], 2.23; 95% CI, 1.40-3.57), but lower for non-Indigenous (aOR, 0.39; 95% CI, 0.28-0.55) and overseas-born women (aOR, 0.61; 95% CI, 0.49-0.77).
CONCLUSION: Among women giving birth, there was a significant reduction in HBV prevalence in Indigenous women associated with the introduction of the HBV vaccination program in NSW, although prevalence remains higher than among non-Indigenous Australian-born women, and it also varies by region of residence. Continuing evaluation is needed to ensure that the prevalence of HBV infections continues to fall in Australia.
DESIGN: Observational study linking data from the NSW Perinatal Data Collection for women giving birth during 2000-2012 with HBV notifications in the NSW Notifiable Conditions Information Management System.
MAIN OUTCOME MEASURES: HBV prevalence in Indigenous Australian, non-Indigenous Australian-born, and overseas-born women giving birth.
RESULTS: Of 482 944 women who gave birth to their first child, 3383 (0.70%) were linked to an HBV notification. HBV prevalence was 1.95% (95% CI, 1.88-2.02%) among overseas-born women, 0.79% (95% CI, 0.63-0.95%) among Indigenous Australian women, and 0.11% (95% CI, 0.09-0.12%) among non-Indigenous Australian-born women. In Indigenous Australian women, prevalence was significantly lower for those who had been eligible for inclusion in the targeted at-risk newborn or universal school-based vaccination programs (maternal year of birth, 1992-1999: 0.15%) than for those who were not (born ≤ 1981: 1.31%; for trend, P < 0.001). There was no statistically significant downward trend among non-Indigenous Australian-born or overseas-born women. HBV prevalence was higher among Indigenous women residing in regional and remote areas than those in major cities (adjusted odds ratio [aOR], 2.23; 95% CI, 1.40-3.57), but lower for non-Indigenous (aOR, 0.39; 95% CI, 0.28-0.55) and overseas-born women (aOR, 0.61; 95% CI, 0.49-0.77).
CONCLUSION: Among women giving birth, there was a significant reduction in HBV prevalence in Indigenous women associated with the introduction of the HBV vaccination program in NSW, although prevalence remains higher than among non-Indigenous Australian-born women, and it also varies by region of residence. Continuing evaluation is needed to ensure that the prevalence of HBV infections continues to fall in Australia.
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