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4714.0.55.005 - Revised 2002 and 2008 NATSISS alcohol data by risk level, Aboriginal and Torres Strait Islander peoples, 2013  
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 15/03/2013  First Issue
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DATA REVISIONS


RISK OF HARM FROM ALCOHOL CONSUMPTION IN THE LONG TERM (CHRONIC RISK)

In the 2002 and 2008 National Aboriginal and Torres Strait Islander Social Survey (NATSISS), respondents aged 15 years and over were asked to report the amount of alcohol consumed on a usual drinking day, as well as the frequency of consumption in the 12 months prior to interview. This information was used to determine their chronic (long-term) alcohol risk level, based on the 2001 National Health and Medical Research Council (NHMRC) Guidelines for minimising the risk of long term harm from the consumption of alcohol.

Error in published rates for people drinking at 'low risk' and 'risky' levels

The 2001 NHMRC Guidelines were incorrectly applied, such that males who reported four standard drinks (50mls of alcohol) and females who reported two standard drinks (25 mls of alcohol) were categorised as drinking at 'risky' rather than 'low risk' levels. Males reporting seven or more standard drinks and females reporting five or more standard drinks were correctly categorised as being at 'high risk' of harm.

Effects of data revisions on 2002 and 2008 NATSISS alcohol data by risk level

The proportion of Aboriginal and Torres Strait Islander people in the 'low risk' category for chronic harm has been revised from 46% to 50% for both 2002 and 2008 — a change of around four percentage points for both males and females in both survey years. At the same time, the rates of 'risky' and 'risky/high risk' drinking have been revised down by the same margin. The revised 2002 and 2008 data show that apart from people drinking at 'risky' levels, differences between male and female rates of alcohol consumption were statistically significant for all levels of risk (tables 1.1 and 1.2).


1.1 Alcohol consumption in the last 12 months by risk level and sex(a)(b), Aboriginal and Torres Strait Islander people aged 15 years and over—2002
Males
Females
Persons
Published
Revised
Difference
Published
Revised
Difference
Published
Revised
Difference

Low risk(c)
%
52.7
(d)56.2
+3.5
40.0
(d)43.9
+3.9
46.1
49.8
+3.7
Risky(e)
%
10.0
6.5
-3.5
9.2
5.3
-3.9
9.6
5.9
-3.7
High risk(f)
%
7.1
(d)7.1
..
4.2
(d)4.2
..
5.6
5.6
..
Chronic risky/high risk
%
17.1
(d)13.6
-3.5
13.4
(d)9.5
-3.9
15.1
11.5
-3.7
Has not consumed alcohol in the last 12 months(g)
%
29.5
(d)29.5
..
45.9
(d)45.9
..
38.0
38.0
..
Total(h)
%
100.0
100.0
..
100.0
100.0
..
100.0
100.0
..
Persons aged 15 years and over
no.
135 200
135 200
..
147 000
147 000
..
282 200
282 200
..

.. Not applicable
(a) Based on the amount of alcohol (mls) consumed on a usual drinking day, and the frequency of consumption in the last 12 months.
(b) Risk levels reflect the 2001 NHMRC Guidelines. One standard drink contains 12.5 mls of alcohol.
(c) For males, up to and including 4 standard drinks, and for females, up to and including 2 standard drinks.
(d) Difference between revised rate for males and revised rate for females is statistically significant.
(e) For males, 5 or 6 standard drinks, and for females, 3 or 4 standard drinks.
(f) For males, 7 or more standard drinks, and for females, 5 or more standard drinks.
(g) Includes people who have never consumed alcohol.
(h) Includes people for whom level of alcohol consumption was not stated.

Source: 2002 National Aboriginal and Torres Strait Islander Social Survey



1.2 Alcohol consumption in the last 12 months by risk level and sex(a)(b), Aboriginal and Torres Strait Islander people aged 15 years and over—2008
Males
Females
Persons
Published
Revised
Difference
Published
Revised
Difference
Published
Revised
Difference

Low risk(c)
%
51.1
(d)55.1
+4.0
41.9
(d)46.1
+4.2
46.3
50.4
+4.1
Risky(e)
%
11.3
7.3
-4.0
10.6
6.4
-4.2
10.9
6.8
-4.1
High risk(f)
%
9.0
(d)9.0
..
3.7
(d)3.7
..
6.3
6.3
..
Chronic risky/high risk
%
20.3
(d)16.4
-4.0
14.3
(d)10.1
-4.2
17.2
13.1
-4.1
Has not consumed alcohol in the last 12 months(g)
%
26.5
(d)26.5
..
43.0
(d)43.0
..
35.1
35.1
..
Total(h)
%
100.0
100.0
..
100.0
100.0
..
100.0
100.0
..
Persons aged 15 years and over
no.
156 100
156 100
..
171 000
171 000
..
327 100
327 100
..

.. Not applicable
(a) Based on the amount of alcohol (mls) consumed on a usual drinking day, and the frequency of consumption in the last 12 months.
(b) Risk levels reflect the 2001 NHMRC Guidelines. One standard drink contains 12.5 mls of alcohol.
(c) For males, up to and including 4 standard drinks, and for females, up to and including 2 standard drinks.
(d) Difference between revised rate for males and revised rate for females is statistically significant.
(e) For males, 5 or 6 standard drinks, and for females, 3 or 4 standard drinks.
(f) For males, 7 or more standard drinks, and for females, 5 or more standard drinks.
(g) Includes people who have never consumed alcohol.
(h) Includes people for whom level of alcohol consumption was not stated.

Source: 2008 National Aboriginal and Torres Strait Islander Social Survey


Change, over time, in the proportion of Aboriginal and Torres Strait Islander people at risk of long term harm

Between 2002 and 2008, the proportion of Aboriginal and Torres Strait Islander people who had abstained from drinking alcohol in the last 12 months decreased from 38% to 35%. There were no other statistically significant changes in rates over this period.

RISK OF HARM FROM ALCOHOL CONSUMPTION IN THE SHORT TERM (ACUTE RISK)

In the 2002 and 2008 National Aboriginal and Torres Strait Islander Social Survey (NATSISS), respondents aged 15 years and over were asked to report the largest amount of alcohol (mls) consumed on a single drinking day in the two weeks prior to interview. This information was used to determine their acute (short-term) risk of harm from alcohol consumption, based on the 2001 National Health and Medical Research Council (NHMRC) Guidelines.

Error in published rates for people drinking at 'low risk' and 'risky' levels

The 2001 NHMRC Guidelines for alcohol consumption were incorrectly applied, such that males who reported six standard drinks (75mls of alcohol) and females who reported four standard drinks (50 mls of alcohol) were categorised as drinking at 'risky' rather than 'low risk' levels. Males reporting eleven or more standard drinks and females reporting seven or more standard drinks were correctly categorised as being at 'high risk' of harm.

Effects of data revisions on 2002 NATSISS alcohol data by risk level

The proportion of Aboriginal and Torres Strait Islander people in the 'low risk' category for acute harm has been revised from 11% to 15% — a change of around four percentage points for males and two percentage points for females. At the same time, the rates of 'risky' and 'risky/high risk' drinking have also been revised down by the same margin. The revised 2002 data show that differences between male and female rates of alcohol consumption were statistically significant for all levels of risk (table 1.3).


1.3 Alcohol consumption in the last two weeks by risk level and sex(a)(b), Aboriginal and Torres Strait Islander people aged 15 years and over—2002
Males
Females
Persons
Published
Revised
Difference
Published
Revised
Difference
Published
Revised
Difference

Low risk(c)
%
12.0
(d)16.2
+4.3
10.7
(d)13.1
+2.4
11.3
14.6
+3.3
Risky(e)
%
16.2
(d)11.9
-4.3
7.8
(d)5.4
-2.4
11.8
8.5
-3.3
High risk(f)
%
28.3
(d)28.3
..
18.3
(d)18.3
..
23.1
23.1
..
Acute risky/high risk
%
44.5
(d)40.2
-4.3
26.1
(d)23.8
-2.4
34.9
31.7
-3.3
Has not consumed alcohol in the last two weeks(g)
%
43.1
(d)43.1
..
62.7
(d)62.7
..
53.3
53.3
..
Total(h)
%
100.0
100.0
..
100.0
100.0
..
100.0
100.0
..
Persons aged 15 years and over
no.
135 200
135 200
..
147 000
147 000
..
282 200
282 200
..

.. Not applicable
(a) Based on the largest amount of alcohol (mls) consumed on a single drinking day in the last two weeks.
(b) Risk levels reflect the 2001 NHMRC Guidelines. One standard drink contains 12.5 mls of alcohol.
(c) For males, up to and including 6 standard drinks, and for females, up to and including 4 standard drinks.
(d) Difference between revised rate for males and revised rate for females is statistically significant.
(e) For males, 7 to 10 standard drinks, and for females, 5 or 6 standard drinks.
(f) For males, 11 or more standard drinks, and for females, 7 or more standard drinks.
(g) Includes people who have never consumed alcohol.
(h) Includes people for whom level of alcohol consumption was not stated.

Source: 2002 National Aboriginal and Torres Strait Islander Social Survey

Effects of data revisions on 2008 NATSISS alcohol data by risk level

The overall proportion of Aboriginal and Torres Strait Islander people in the 'low risk' category for acute harm has been revised from 13% to 16% — a change of around five percentage points for males and one percentage point for females. At the same time, the rates of 'risky' and 'risky/high risk' drinking have also been revised down by the same margin. The revised 2008 data show that differences between male and female rates of alcohol consumption were statistically significant for all risk levels (table 1.4).

1.4 Alcohol consumption in the last two weeks by risk level and sex(a)(b), Aboriginal and Torres Strait Islander people aged 15 years and over—2008
Males
Females
Persons
Published
Revised
Difference
Published
Revised
Difference
Published
Revised
Difference

Low risk(c)
%
15.0
(d)20.1
+5.1
11.1
(d)12.4
+1.3
12.9
16.1
+3.2
Risky(e)
%
15.8
(d)10.7
-5.1
6.9
(d)5.6
-1.3
11.2
8.0
-3.2
High risk(f)
%
30.3
(d)30.3
..
21.3
(d)21.3
..
25.6
25.6
..
Acute risky/high risk
%
46.1
(d)40.9
-5.1
28.2
(d)26.9
-1.3
36.8
33.6
-3.2
Has not consumed alcohol in the last two weeks(g)
%
37.6
(d)37.6
..
60.3
(d)60.3
..
49.5
49.5
..
Total(h)
%
100.0
100.0
..
100.0
100.0
..
100.0
100.0
..
Persons aged 15 years and over
no.
156 100
156 100
..
171 000
171 000
..
327 100
327 100
..

.. Not applicable
(a) Based on the largest amount of alcohol (mls) consumed on a single drinking day in the last two weeks.
(b) Risk levels reflect the 2001 NHMRC Guidelines. One standard drink contains 12.5 mls of alcohol.
(c) For males, up to and including 6 standard drinks, and for females, up to and including 4 standard drinks.
(d) Difference between revised rate for males and revised rate for females is statistically significant.
(e) For males, 7 to 10 standard drinks, and for females, 5 or 6 standard drinks.
(f) For males, 11 or more standard drinks, and for females, 7 or more standard drinks.
(g) Includes people who have never consumed alcohol.
(h) Includes people for whom level of alcohol consumption was not stated.

Source: 2008 National Aboriginal and Torres Strait Islander Social Survey

Change, over time, in the proportion of Aboriginal and Torres Strait Islander people at risk of short-term harm

Between 2002 and 2008, the proportion of Aboriginal and Torres Strait Islander people who had abstained from drinking alcohol in the two weeks prior to interview decreased from 53% to 49%. While there were decreases for both males (from 43% to 38%) and females (from 63% to 60%), only the change for males was statistically significant. Over the same period, the proportion of males at low risk of harm in the short term increased from 16% to 20%.

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