Healthy Communities: Tobacco smoking rates across Australia, 2014–15 - Technical Note - Adults who are daily smokers, 2014–15

Healthy Communities: Tobacco smoking rates across Australia, 2014–15

Adults who are daily smokers, 2014–15

This technical note accompanies Healthy Communities: Tobacco smoking rates across Australia, 2014–15 (In Focus). It describes the indicator ‘percentage of adults who are daily smokers, 2014–15’.

Data source
Data source

Australian Bureau of Statistics National Health Survey 2014–15 (ABS NHS 2014–15).

Notes:

  • Data were collected between July 2014 and June 2015.
  • The ABS NHS 2014–15 excluded adults living in non-private dwellings, very remote areas and discrete Aboriginal and Torres Strait Islander communities.
  • For further information refer to the ABS National Health Survey: First Results, 2014–15.1

Indicator description and calculation
Type of measurement Percentage, reported at one decimal place.
Calculation 100 × (numerator ÷ denominator)
Numerator

Number of adults who smoke tobacco every day.

Notes:

  • Participants were included in the analysis if they were aged 18 years and over.
  • Participants in the ABS NHS 2014–15 were asked whether they currently smoked at least once per day.
  • A current daily smoker was defined as a person who smokes one or more cigarettes, roll-your-own cigarettes, cigars or pipes at least once a day. Chewing tobacco, electronic cigarettes (and similar) and the smoking of non-tobacco products were excluded.
  • The numerator was calculated as the sum of calibrated sample weights for adults who responded that they currently smoke tobacco daily and who were enumerated within the particular Primary Health Network (PHN) area.

Denominator

Total population of adults.

Note:
The denominator was calculated as the sum of calibrated sample weights for adults who were enumerated within the PHN area.
Disaggregation

PHN areas, including:

  • Metropolitan PHN areas
  • Regional PHN areas.

Refer to the ‘Geography’ page for more detail.
Confidence intervals As an indication of the accuracy of proportions, 95% confidence intervals were produced. These were calculated by the ABS using relative standard error (RSE) estimates of the proportion.
Area suppression rules

The ABS suppressed the RSE where the RSE of the estimate was greater than 50%. These estimates were considered unreliable for general use.

Additional suppression rules were developed and applied by the Australian Institute of Health and Welfare to ensure robust reporting of these data at PHN area.

Data for PHN areas were supressed if:

  • There was the likelihood of a non-representative sample. Where the survey sample count in the PHN area was small (less than 20% of the expected number of adults) and the RSE was 25% to 50%, the result for the PHN area was suppressed
  • There was rate instability. Where the survey sample count in a PHN area was marginal (20–40% of the expected number of adults), the 2014–15 rate was compared to the 2011–12 rate and the PHN area suppressed if extreme variation was observed. Extreme variation between 2011–12 and 2014–15 was defined as a percentage point change within the top decile, resulting in a 2014–15 estimate which was the highest or lowest rate across all PHN areas.

The ‘interpret with caution’ flag was applied to data if the RSE associated with the proportion was 25% to 50%. This indicates the proportion derived is subject to high sampling error and should be used with caution.

1. ABS (Australian Bureau of Statistics) 2015. National Health Survey: First results, 2014–15. ABS Cat. No. 4364.0.55.001. Canberra: ABS. Viewed 26 October 2016, http://www.abs.gov.au/ausstats/abs@.nsf/mf/4364.0.55.001External link, opens in a new window.