National Indigenous Reform Agreement: PI 04-Levels of risky alcohol consumption, 2014 QS
Identifying and definitional attributes
|Metadata item type:||Quality Statement|
|Synonymous names:||Data quality statement —Indicator 4 Levels of risky alcohol consumption|
|Indicators linked to this Quality statement:|
These surveys were collected, processed, and published by the Australian Bureau of Statistics (ABS). The ABS operates within a framework of the Census and Statistics Act 1905 and the Australian Bureau of Statistics Act 1975. These ensure the independence and impartiality from political influence of the ABS, and the confidentiality of respondents.
For more information on the institutional environment of the ABS, including the legislative obligations of the ABS, financing and governance arrangements, and mechanisms for scrutiny of ABS operations, please see ABS Institutional Environment (ABS website).
The AATSIHS is conducted approximately every six years over a 12-month period. Results from the 2012-13 NATSIHS component of the AATSIHS were released in November 2013. The previous NATSIHS was conducted in 2004-05.
The AHS is conducted every three years over a 12-month period. Results from the 2011-12 NHS component of the AHS were released in October 2012.
See Australian Aboriginal and Torres Strait Islander Health Survey: First Results (cat. no. 4727.0.55.001) for an overview of results from the NATSIHS component of the AATSIHS. See Australian Health Survey: First Results (cat. no. 4364.0.55.001) for an overview of results from the NHS component of the AHS. Other information from this survey may also be available on request.
Information to aid interpretation of the data is available from the Australian Aboriginal and Torres Strait Islander Health Survey: Users’ Guide and Australian Health Survey: Users’ Guide on the ABS website.
Many health-related issues are closely associated with age, therefore data for this indicator have been age-standardised to the 2001 total Australian population to account for differences in the age structures of the states and territories and Indigenous and non-Indigenous populations. Age-standardised rates should be used to assess the relative differences between groups, not to infer the rates that actually exist in the population.
The 2012-13 NATSIHS and NHS component of the AHS collected self-reported information on alcohol consumption from persons aged 15 years and over. Respondents were asked to report the number of drinks of each type they had consumed, the size of the drinks, and, where possible, the brand name(s) of the drink(s) consumed on each of the most recent three days in the last week on which they had consumed alcohol.
Intake of alcohol refers to the quantity of alcohol contained in any drinks consumed, not the quantity of the drinks.
To measure against the 2009 NHMRC guidelines, reported quantities of alcoholic drinks consumed were converted to millilitres (mls) of alcohol present in those drinks, using the formula:
An average daily amount of alcohol consumed was calculated (i.e. an average over the 7 days of the reference week), using the formula:
According to average daily alcohol intake over the 7 days of the reference week, consumption of more than 2 standard drinks per day on average equated to risky or high-risk consumption.
The AATSIHS was conducted in all states and territories, including very remote areas. Non-private dwellings such as hotels, motels, hospitals, nursing homes and short-stay caravan parks were excluded from the survey. The final response rate for the 2012-13 NATSIHS component was 80.2%. Results are weighted to account for non-response.
The AHS was conducted in all states and territories, excluding very remote areas. Non-private dwellings such as hotels, motels, hospitals, nursing homes and short-stay caravan parks were also not included in the survey. The exclusion of persons usually residing in very remote areas has only a minor effect on estimates for individual states and territories, except for the Northern Territory where such persons make up approximately 23% of the population. The response rate for the 2011-12 NHS component was 84.8%. Results are weighted to account for non-response.
As they are drawn from a sample survey, data for the indicator are subject to sampling error. Sampling error occurs because only a small proportion of the population is used to produce estimates that represent the whole population. Sampling error can be reliably estimated as it is calculated based on the scientific methods used to design surveys. Rates should be considered with reference to their Relative Standard Error (RSE). Estimates with RSEs between 25% and 50% should be used with caution. Estimates with RSEs greater than 50% are generally considered too unreliable for general use.
For the non-Indigenous population, data for Northern Territory for 2007-08 should be used with caution due to large RSEs resulting from the small sample size for NT in 2007-08.
The collection of accurate data on quantity of alcohol consumed is difficult, particularly where recall is concerned, given the nature and possible circumstances of consumption. The use of the one week reference period (with collection of data for the most recent three days in the last week on which the person drank) is considered to be short enough to minimise recall bias but long enough to obtain a reasonable indication of drinking behaviour. While the last week exact recall method may not always reflect the usual drinking behaviour of the respondent at the individual level, at the population level this is expected to largely average out.
The collection and coding of individual brands and container size ensures that no mental calculation is required of the respondent in reporting standard drinks, and is considered to eliminate potential for the underestimation bias which is known to occur when people convert drinks into standard drinks.
The AATSIHS and AHS collected a range of other health-related information that can be analysed in conjunction with alcohol risk level.
Aggregate levels of alcohol consumption for the total population implied by the AHS are somewhat less than the estimates of apparent consumption of alcohol based on the availability of alcoholic beverages in Australia from taxation and customs data; see Apparent Consumption of Alcohol, 2010-11 (cat. no. 4307.0.55.001). This suggests a tendency towards under-reporting of alcohol consumption in self-report surveys.
Other collections, such as the National Drug Strategy Household Survey (NDSHS), report against the same NHMRC guidelines. Results from the most recent NDSHS in 2010 show slightly lower estimates for long-term harm from alcohol than in the 2011-13 AHS. These differences may be due to the greater potential for non-response bias in the NDSHS and the differences in collection methodology.
Source and reference attributes
|Submitting organisation:||Australian Bureau of Statistics|
Numerator and denominator —
The numerator and denominator for the Aboriginal and Torres Strait Islander population use data from the ABS National Aboriginal and Torres Strait Islander Health Survey (NATSIHS) component of the 2012-13 Australian Aboriginal and Torres Strait Islander Health Survey (AATSIHS) from approximately 9,300 people, which is weighted to benchmarks for the Aboriginal and Torres Strait Islander estimated resident population at 30 June 2011.
For more information on the structure of the AATSIHS, see Structure of the Australian Aboriginal and Torres Strait Islander Health Survey. For information on scope and coverage, see the Australian Aboriginal and Torres Strait Islander Health Survey: Users’ Guide (cat. no. 4727.0.55.002).
For earlier reporting cycles, data are from the ABS 2004-05 National Aboriginal and Torres Strait Islander Health Survey.
The numerator and denominator for the non-Indigenous population use the ABS National Health Survey (NHS) component of the general population component of the Australian Health Survey (AHS), from approximately 20,400 people, which is weighted to benchmarks for the total AHS in-scope estimated resident population at 31 October 2011.
For earlier reporting cycles, data are from the ABS 2004-05 National Health Survey.
For more information on the structure of the AHS, see Structure of the Australian Health Survey. For information on scope and coverage, see the Australian Health Survey: Users’ Guide (cat. no. 4363.0.55.001).
|Related metadata references:|
Supersedes National Indigenous Reform Agreement: P05-Average daily alcohol consumption and associated risk levels; rates of alcohol consumption at long term risky to high risk levels, 2010 QS
Has been superseded by National Indigenous Reform Agreement: PI 04-Levels of risky alcohol consumption, 2015-16; Quality Statement
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