Susan Yuill

The impact of HPV vaccination beyond cancer prevention: effect on pregnancy outcomes

While the benefits of human papillomavirus (HPV) vaccination relating to cervical cancer prevention have been widely documented, recent published evidence is suggestive of an impact on adverse pregnancy outcomes (APOs) in vaccinated mothers and their infants, including a reduction in rates of preterm births and small for gestational age infants. In this review, we examine this evidence and the possible mechanisms by which HPV vaccination may prevent these APOs. Large-scale studies linking HPV vaccination status with birth registries are needed to confirm these results. Potential confounding factors to consider in future analyses include other risk factors for APOs, and historical changes in both the management of cervical precancerous lesions and prevention of APOs. If confirmed, these additional benefits of HPV vaccination in reducing APO rates will be of global significance, due to the substantial health, social and economic costs associated with APOs, strengthening the case for worldwide HPV immunization.

Cancer Incidence in Migrants in Australia: Patterns of Three Infection-Related Cancers

Abstract Background: Australia provides an ideal population-base for cancer migration studies because of its multicultural society and high-quality cancer registrations. Among migrant groups there is considerable variability in the incidence of infection-related cancers; thus, the patterns of three such cancers were examined among migrant groups relative to Australian-born residents. Methods: Using national incidence data for cancers of the stomach, liver, and cervix diagnosed during 2005 to 2014, incidence rates were compared for selected migrant groups with the Australian-born population using incidence rate ratios (IRR), from a negative binomial regression model. Results: Wide variations in incidence between countries/regions of birth were observed for all three cancers (P < 0.0001). The patterns were similar for cancers of the stomach and liver, in that migrants from countries/regions with higher incidence rates maintained an increased risk in Australia, with the highest being among South American migrants (IRR = 2.35) for stomach cancer and among Vietnamese migrants (5.44) for liver cancer. In contrast, incidence rates of cervical cancer were lower for many migrant groups, with women from Southern Asia (0.39) and North Africa (0.42) having the lowest rates. The rate of cervical cancer was higher in migrants from New Zealand, Philippines, and Polynesia. Conclusions: Several Australian migrant groups were found to experience a disproportionate burden of infection-related cancers; further studies of associated risk factors may inform the design of effective interventions to mediate these disparities. Impact: By identifying these migrant groups, it is hoped that these results will motivate and inform prevention or early detection activities for these migrant groups. See related commentary Dee and Gomez, p. 1251

Participation in the national cervical screening programme among women from New South Wales, Australia, by place of birth and time since immigration: A data linkage analysis using the 45 and up study

Objective Equitable elimination of cervical cancer in Australia within the next decade will require high National Cervical Screening Program (NCSP) participation by all subgroups of women. The aim of this study was to examine the participation of immigrants compared to Australian-born women. Methods Participation in the NCSP (≥1cytology test) over a 3-year (2010–2012) and 5-year (2008–2012) period, by place of birth and time since immigration was examined using individually linked data of 67,350 New South Wales (NSW) women aged ≥45 enrolled in the 45 and Up Study. Results Three-year cervical screening participation was 77.0% overall. Compared to Australian-born women (77.8%), 3-year participation was lower for women born in New Zealand (adjusted odds ratio 0.77, 95% confidence interval 0.69–0.87), Oceania (0.67, 0.51–0.89), Middle East/North Africa (0.76, 0.60–0.97), South-East Asia (0.72, 0.60–0.87), Chinese Asia (0.82, 0.69–0.97), Japan/South Korea (0.68, 0.50–0.94), and Southern/Central Asia (0.54, 0.43–0.67), but higher for women from Malta (2.85, 1.77–4.58) and South America (1.33, 1.01–1.75). Non-English-speaking-at-home women were less likely to be screened than English-speaking-at-home women (0.85, 0.78–0.93). Participation increased with years lived in Australia but remained lower in immigrant groups compared to Australian-born women, even after ≥20 years living in Australia. Similar results were observed for 5-year participation. Conclusions Women born in New Zealand, Oceania, and parts of Asia and the Middle East had lower NCSP participation, which persisted for ≥20 years post-immigration. The NCSP transition to primary HPV screening, and the introduction of the universal self-collection option in 2022, will offer new opportunities for increasing screening participation for these groups.

Participation in the National Cervical Screening Program Among Women Who Gave Birth in New South Wales, Australia by Place of Maternal Birth: A Data Linkage Analysis

ABSTRACT Objective High participation rates in the National Cervical Screening Program (NCSP) by all groups of women are required to ensure the equitable elimination of cervical cancer in Australia. In this study, we examine screening participation of overseas‐born women compared to Australian‐born women who gave birth. Design Population‐based retrospective cohort study using linked health datasets. Setting and Participants Women who gave birth in New South Wales between January 1, 2000 and June 30, 2017. Main Outcome Measures Participation in the NCSP (≥ 1 cytology test) in the 3‐ and 5‐year periods prior to delivery by place of maternal birth, adjusted for multiple socio‐demographic and health characteristics. Results Among the 1 332 669 mothers who gave birth over the study period, overall cervical screening participation in the 3‐ and 5‐year periods prior to delivery was 67.0% and 75.7%, respectively. Participation was lower for overseas‐born mothers compared to Australian‐born mothers for both the 3‐year (57.8% vs. 71.7%; adjusted odds ratio [aOR]: 0.51, 95% confidence interval [CI]: 0.50–0.51) and 5‐year (64.9% vs. 81.2%; aOR: 0.40, 95% CI: 0.40–0.40) participation periods. All groups of overseas‐born women had substantially lower screening participation compared to Australian‐born women, with the lowest relative 3‐year participation in mothers born in Southern/Central Asia (aOR: 0.30, 95% CI: 0.30–0.31), Oceania (aOR: 0.31, 95% CI: 0.30–0.32), North‐East Asia (aOR: 0.49, 95% CI: 0.48–0.50), and New Zealand (aOR: 0.49, 95% CI: 0.48–0.51). Conclusions Overseas‐born women had around half the cervical screening participation in the period prior to birth compared to Australian‐born women. It is likely that opportunities to screen these under‐screened groups during the antenatal period, typically a time of repeated health services contact, are missed.

Cervical Cancer Elimination in Australia and the Asia Pacific: Progress and Barriers

ABSTRACT Australia has been at the forefront of innovation and implementation of cervical cancer control and is predicted to eliminate cervical cancer by 2035, the first country to achieve elimination using active measures. This is a result of Australia being an early adopter of universal human papillomavirus (HPV) vaccination and early transition to a primary HPV‐based cervical screening program. However, to ensure timely and equitable elimination, disparities in coverage among underserved populations must be addressed, and recent declines in vaccination and screening uptake must be reversed. Improved routine data linkages are required to ensure gaps in participation in subpopulations can be identified. Primary health providers have an important role in checking vaccination and screening status and offering vaccination catch‐up or screening as appropriate. A universal option of self‐collection of an HPV sample for all screen‐eligible people has increased acceptability overall, but further innovative and flexible models of service delivery are required to ensure equitable access for all. Australia has also played an important role in cervical cancer control globally and was a co‐sponsor of the 2020 World Health Assembly resolution to accelerate the global elimination of cervical cancer as a public health problem. In the Indo‐Pacific region, regional frameworks have been developed to advance strategic actions to progress implementation of the global strategy. The Elimination Partnership in the Indo‐Pacific for Cervical Cancer (EPICC), a major initiative supported by the Australian Government and the Minderoo Foundation, provides tailored support to countries, considering local needs and priorities.