Hepatitis B virus carrier prevalence in New Zealand: population estimates using the 1987 police and customs personnel survey.

AIM

To estimate the population hepatitis B surface antigen (HBsAg) carrier prevalence for adults in New Zealand.

METHOD

Data for 1987 from the New Zealand Police Department and New Zealand Customs Department hepatitis B sero-marker survey were further analysed. The sample size was 5510 staff who had completed a questionnaire, had blood sera taken and were not already immunised against hepatitis B.

RESULTS

Maori adults had a HBsAg carrier prevalence of 5.43% (95% confidence interval 3.07-8.81), Pacific adults 4.44% (1.65-9.42), and European adults 0.42% (0.26-0.65). Other ethnic minorities and people with two or more self-assigned ethnic identities had a carrier prevalence of 3.85% (1.06-9.56). There were non-significant differences in this study for carrier prevalence by sex, age and region.

CONCLUSIONS

Policy formation on screening programmes for hepatitis B carriers should assume a HBsAg carrier prevalence of about 5% for Maori, Pacific people and ethnic minorities, and about 0.5% for New Zealanders of European extraction.