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A ‘test and treat’ prevention strategy in Australia requires innovative HIV testing models: a cohort study of repeat testing among ‘high-risk’ men who have sex with men
  1. Anna L Wilkinson1,2,
  2. Carol El-Hayek1,
  3. Tim Spelman1,
  4. Christopher K Fairley3,4,
  5. David Leslie5,
  6. Emma S McBryde1,6,
  7. Margaret Hellard1,2,7,
  8. Mark Stoové1,2
  1. 1Centre for Population Health, Burnet Institute, Melbourne, Victoria, Australia
  2. 2School of Public Health and Preventive Medicine, Monash University, Alfred Hospital, Melbourne, Victoria, Australia
  3. 3Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia
  4. 4Central Clinical School, Monash University, Alfred Hospital, Melbourne, Victoria, Australia
  5. 5Victorian Infectious Disease Reference Laboratory, Melbourne, Victoria, Australia
  6. 6Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
  7. 7Department of Infectious Disease, Alfred Health, Alfred Hospital, Melbourne, Victoria, Australia
  1. Correspondence to Anna L Wilkinson, Centre for Population Health, Burnet Institute, 85 Commercial Rd, Melbourne VIC 3004, Australia; awilkinson{at}burnet.edu.au

Abstract

Objectives HIV diagnoses among men who have sex with men (MSM) in several high-income countries, including Australia, have increased substantially over recent years. Australia, in line with global prevention strategies, has emphasised a ‘test and treat’ HIV prevention strategy which relies on timely detection of HIV through frequent testing by those at risk. We examined trends in repeat testing among MSM defined as ‘high-risk’ according to Australian testing guidelines.

Methods HIV test records from MSM attending high caseload clinics in Melbourne 2007–2013 and classified as high-risk were analysed. Binary outcomes of ‘test within 3 months’ and ‘test within 6 months’ were assigned to tests within individuals’ panel of records. Negative binomial regressions assessed trends in overall HIV testing and returning within 3 and 6 months. Annualised proportions of return tests (2007–2012) were compared using two-sample z tests.

Results Across 18 538 tests among 7117 high-risk MSM attending primary care clinics in Melbourne (2007–2013), the number of annual HIV tests increased (p<0.01). Between 2007 and 2012 annualised proportions of tests with a subsequent test within 3 and 6 months also increased (p<0.01); however, by 2012 only 36.4% and 15.1% of tests were followed by another test inside 6 and 3 months, respectively.

Conclusions Repeat testing among high-risk MSM in Australia remains unacceptably low, with recent modest increases in testing unlikely to deliver meaningful prevention impact. Removing known barriers to HIV testing is needed to maximise the potential benefit of test and treat-based HIV prevention.

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