Below is a summary of HCV prevalence estimates among IDUs in each state and territory according to NSP survey data (see figure HCV prevalence among Australian IDUs). ^{54} This data is consistent with sentinel and non-sentinel site data.

There appears to be an overall (slightly) increasing trend in HCV prevalence over time. We used regression analysis to determine the best-fitting straight line through the data. Mean and 95% confidence intervals for the trend in prevalence for each state/territory were calculated and are presented below (see figure mean and 95% confidence intervals).

## HCV prevalence among Australian IDUs in each state and territory (1999-2007)

### Text version of HCV prevalence among Australian IDUs in each state and territory (1999-2007)

Figures in this description are approximate as they have been read from the graph. ACT (%) | NSW (%) | NT (%) | QLD (%) | SA (%) | TAS (%) | VIC (%) | WA (%) | Indigenous (%) | Australia (%) | |
---|---|---|---|---|---|---|---|---|---|---|

1999 | 60 | 60 | 49 | 38 | 42 | 39 | 60 | 50 | - | 50 |

2000 | 58 | 68 | 42 | 39 | 48 | 54 | 62 | 41 | - | 54 |

2001 | 62 | 72 | 60 | 45 | 52 | 57 | 70 | 55 | - | 59 |

2002 | 79 | 70 | 62 | 49 | 43 | 45 | 58 | 44 | 60 | 57 |

2003 | 80 | 69 | 48 | 50 | 46 | 59 | 67 | 60 | 64 | 60 |

2004 | 70 | 70 | 56 | 52 | 48 | 48 | 70 | 60 | 69 | 62 |

2005 | 74 | 69 | 50 | 53 | 46 | 60 | 68 | 60 | 71 | 62 |

2006 | 72 | 70 | 30 | 55 | 43 | 58 | 71 | 58 | 70 | 63 |

2007 | 90 | 69 | 62 | 60 | 40 | 61 | 72 | 45 | 69 | 63 |

## Mean and 95% confidence intervals for the trend in prevalence of HCV among Australia IDUs for each state and territory (1999-2007)

Top of page

Top of page

### Text version of Mean and 95% confidence intervals for the trend in prevalence of HCV among Australia IDUs for each state and territory (1999-2007)

Figures in this description are approximate as they have been read from the graph.Mean and 95% confidence intervals for the trend in prevalence of HCV among Australia IDUs for each state and territory (1999-2007) consists of ten graphs:

**HCV prevalence among Australian IDUs**- The 95% confidence interval narrows from a range of 50-55 in 1999 to 56-59 in 2003 before widening to 61-66 in 2007.
- The mean increases gradually from 52 in 1999 to 64 in 2007.

**HCV prevalence among Australian IDUs in the Australian Capital Territory**- The 95% confidence interval narrows from a range of 49-70 in 1999 to 66-78 in 2003 before widening to 72-94 in 2007.
- The mean increases gradually from 60 in 1999 to 82 in 2007.

**HCV prevalence among Australian IDUs in New South Wales**- The 95% confidence interval narrows from a range of 60-71 in 1999 to 66-72 in 2003 before widening to 66-78 in 2007.
- The mean increases gradually from 66 in 1999 to 71 in 2007.

**HCV prevalence among Australian IDUs in the Northern Territory**- The 95% confidence interval narrows from a range of 35-69 in 1999 to 42-60 in 2003 before widening to 34-68 in 2007.
- The mean decreases gradually from 51 in 1999 to 50 in 2007.

**HCV prevalence among Australian IDUs in Queensland**- The 95% confidence interval narrows from a range of 38-41 in 1999 to 49-50 in 2003 before widening to 58-61 in 2007.
- The mean increases gradually from 39 in 1999 to 60 in 2007.

**HCV prevalence among Australian IDUs in South Australia**- The 95% confidence interval narrows from a range of 41-52 in 1999 to 42-48 in 2003 before widening to 38-49 in 2007.
- The mean decreases gradually from 48 in 1999 to 44 in 2007.

**HCV prevalence among Australian IDUs in Tasmania**- The 95% confidence interval narrows from a range of 38-54 in 1999 to 49-58 in 2003 before widening to 51-69 in 2007.
- The mean increases gradually from 46 in 1999 to 60 in 2007.

**HCV prevalence among Australian IDUs in Victoria**- The 95% confidence interval narrows from a range of 55-66 in 1999 to 64-69 in 2003 before widening to 66-78 in 2007.
- The mean increases gradually from 60 in 1999 to 71 in 2007.

**HCV prevalence among Australian IDUs in Western Australia**- The 95% confidence interval narrows from a range of 38-60 in 1999 to 46-58 in 2003 before widening to 44-65 in 2007.
- The mean increases gradually from 49 in 1999 to 54 in 2007.

**HCV prevalence among Australian IDUs in Indigenous Australians**- The 95% confidence interval narrows from a range of 54-61 in 1999 to 62-67 in 2003 before widening to 68-76 in 2007.
- The mean increases gradually from 58 in 1999 to 71 in 2007.