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Table 2 Benchmark and multiplier data used in estimating people who inject drugs in Australia

From: Estimating the number of people who inject drugs in Australia

Area

Number of people aged 15–64 years in OST on a snapshot day, 2014

Number of 2014 ANSPS participants

Proportion (95% CI) of people in 2014 ANSPS reporting current OST

Multiplier (95% CI)

New South Wales

19,246

761

0.42 (0.39, 0.46)

2.38 (2.17, 2.56)

Victoria

14,175

436

0.51 (0.46, 0.56)

1.96 (1.79, 2.17)

Queensland

6362

490

0.30 (0.26, 0.34)

3.33 (2.94, 3.85)

Western Australia

3383

225

0.31 (0.25, 0.37)

3.23 (2.70, 4.00)

South Australia

3165

228

0.37 (0.31, 0.44)

2.70 (2.27, 3.23)

Tasmania

686

69

0.46 (0.34, 0.59)

2.17 (1.69, 2.94)

Australian Capital Territory

917

99

0.53 (0.42, 0.63)

1.89 (1.59, 2.38)

Northern Territory

154

70

0.23 (0.13, 0.34)a

5.07 (3.14, 9.47)a

  1. ANSPS Australian Needle and Syringe Programme Survey, OST opioid substitution therapy, CI confidence interval
  2. aProportion and multiplier based on five-year moving average due to low numbers in benchmark and multiplier data sources