Patterns of service use:
In Western Australia, of the 19,348 clients who received treatment in 2018–19:
- 60% (11,571) received treatment in 2018–19 only
- 11% (2,097) received treatment in both 2017–18 and 2018–19
- 3.6% (693) received treatment in each year from 2016–17 to 2018–19
- 2.0% (379) received treatment in each year from 2015–16 to 2018–19
- 1.7% (337) received treatment in all years, from 2014–15 to 2018–19.
Over the period 2014–15 to 2018–19, 66,921 clients received treatment in Western Australia. Of those:
- 75% (50,046) received treatment in only a single year
- 17% (11,552) received treatment in any 2 of the 5 years
- 5.5% (3,711) received treatment in any 3 of the 5 years
- 1.9% (1,275) received treatment in any 4 of the 5 years
- 0.5% (337) received treatment in all 5 collection years.
Drugs of concern
In 2018–19, for clients in Western Australia receiving treatment episodes for their own alcohol or drug use:
- amphetamines were the most common principal drug of concern (34% of episodes) (Figure 14; Tables SE WA.10); in over half of treatment episodes where amphetamines were the principal drug of concern (59%) injecting was the most common method of use, followed by smokes (36%) (Figure 14b)
- within the amphetamines code group, methamphetamine was reported as a principal drug of concern in almost 9 in 10 (91%) treatment episodes; in over half of treatment episodes where methamphetamine was the principal drug of concern (55%), injecting was the most common method of use, followed by smokes (43%)
- alcohol accounted for the second highest proportion of episodes (33%), followed by cannabis (22%), and heroin (6%).
Clients can nominate up to 5 additional drugs of concern, these drugs are not necessarily the subject of any treatment within the episode (see Technical notes).
In 2018–19, when the client reported additional drugs of concern:
- cannabis was the most common additional drug (25% of episodes), followed by alcohol and nicotine (both 16%), and amphetamines (12%) (Table SE WA.11).
Over the period 2014–15 to 2018–19:
- alcohol was replaced by amphetamines as the most common principal drug of concern for clients in 2015–16 (30% and 35% of episodes respectively), with alcohol decreasing to 29% in 2016–17, and gradually rising to 33% in 2018–19 (Table SE WA.10)
- the trend for amphetamines as a principal drug of concern in Western Australia is higher than the national proportion, increasing from 25% in 2014–15 to 36% in 2016–17 then gradually falling to 34% in 2018–19; compared to national results, 20% in 2014–15 increasing to 27% in both 2017–18 and 2018–19 (Table SD.2)
- within the amphetamines code group, methamphetamine was reported as the principal drug of concern in just under two-thirds of episodes (64%) in 2014–15, rising to 76% in 2015–16, 85% in 2016–17, 88% in 2017–18 and 91% in 2018–19 (Figure 14a)
- cannabis was the third most common principal drug of concern for clients and remained consistently higher than the national proportion, ranging from 24% to 22% over this period in Western Australia.