1.10 Prevalence of smoking in other high-risk sub-groups of the population

Last updated: July 2020

Suggested citation: Greenhalgh, EM, Bayly, M, Hanley-Jones, S. & Scollo, MS 1.10 Prevalence of smoking in other high-risk sub-groups of the population. In Greenhalgh, EM, Scollo, MM and Winstanley, MH [editors].  Tobacco in Australia: Facts and issues. Melbourne: Cancer Council Victoria; 2020. Available from  http://www.tobaccoinaustralia.org.au/chapter-1-prevalence/1-10-prevalence-of-smoking-in-other-high-risk-sub-

 

Discussion of general trends in smoking prevalence in Australia overlooks population sub-groups that have much higher smoking rates, or for whom smoking causes unique or disproportionate problems. Individuals with lower socio-economic status or lower educational attainment are more likely to smoke, as discussed in Section 1.7. Aboriginal and Torres Strait Islander peoples, discussed in the preceding section and in detail in Chapter 8, also show substantially higher smoking rates than the rest of the population, as do members of some other culturally and linguistically diverse communities (see Section 1.8). The following is a brief discussion about other population groups among whom smoking prevalence is either higher than overall Australian prevalence, or for whom smoking poses greater than usual health risks.

1.10.1 Smoking in pregnancy

Addressing smoking during pregnancy is of particular importance since tobacco use harms both the mother and the foetus.1

The Australian Institute of Health and Welfare reports data on births in Australia through the National Perinatal Data Collection. Since 1991, it has collected information concerning both the mother (including demographic profile and matters relating to the pregnancy and birth) and the baby (such as sex, birth-weight and other health indicators).2-6

The NPDC reported that in 2017, 9.9% of women who gave birth smoked during pregnancy, unchanged from 2016, but down from 13% in 2012 and 17.4% in 2005.5, Smoking during pregnancy has declined by 34.8% since 2007. In 2017, 22% of women who reported smoking during the first 20 weeks of pregnancy did not continue to smoke after 20 weeks. Further data from the 2016 National Drug Strategy Household survey showed that while 16% of women reported that they smoked before they knew they were pregnant, while 11% reported smoking after they were aware of their pregnancy.6  The Australian National Perinatal Data Collection also reported that women who smoked during pregnancy tended to have a later first antenatal visit, and one fewer antenatal care visit during their pregnancy, on average.

There are significant variations in the prevalence of smoking during pregnancy in certain sub-populations, reflecting smoking behaviour in these groups within the wider population. In 2017, notable differences in the proportions of women smoking during the first 20 weeks of pregnancy were observed for the following groups:

  • Women who lived in the most disadvantaged areas were about six times more likely to smoke during pregnancy than women living in least disadvantaged areas (17.8% compared to 2.9%)
  • Those living in very remote areas were almost five times more likely to smoke in pregnancy than women in major cities (33.7% compared to 7.2%), and twice as likely as those in remote areas (17.6%)
  • Women with Aboriginal or Torres Strait Islander backgrounds were almost four times more likely to smoke during pregnancy than non-Indigenous women (44.3% compared with 11.8%)
  • The likelihood of smoking during pregnancy decreased with maternal age. One-third (33.7%) of women and girls who became pregnant before the age of 20 smoked during the first half of pregnancy, compared to about 6% of those aged 35 years and older.6

Rates of smoking also substantially differ for teenage pregnancies compared to young women aged 20­–24 years. In 2015 one-third (32%) of teenage mothers smoked during the first 20 weeks and 25% smoked after 20 weeks of pregnancy, while 21% of mothers aged 20–24 years smoked during the first 20 weeks and 16% smoked after 20 weeks of pregnancy.7

Other research has shown that women without a partner, the less educated, those with lower socio-economic status8,9  and women with a psychiatric disorder10 are more likely to smoke during pregnancy. Data from the US shows similar patterns. In 2016, 7.2% of mothers smoked during pregnancy, with prevalence highest among those aged 20–24 years and declining with maternal aged. Large differences in smoking during pregnancy were observed by ethnicity, highest level of educational attainment, and by state. 11

Mirroring smoking prevalence across the general population, rates of smoking during pregnancy also vary by state and territory. Figure 1.10.1 shows rates of smoking during pregnancy by state and territory for 2010 to 2018. It can be seen that in all years, smoking during pregnancy was highest in the Northern Territory and lowest in the Australian Capital Territory. Rates of smoking were also high in Tasmania and Queensland relative to the national average over this nine-year period, the decline in smoking during pregnancy was greatest for Tasmania (6 percentage points), most of which occurred between 2010 and 2011. Large declines were also observed in South Australia (6.8 percentage points) and the Australian Capital Territory (5.6 percentage points). For most jurisdictions, the majority of the decline in smoking prevalence during pregnancy occurred between 2010 and 2013. An overall decline continued for most states and territories during 2018, with the exception of Tasmania, the Northern Territory and to a lesser extent New South Wales12 

 

 

Figure 1.10.1
Prevalence of smoking during any stage of pregnancy 2010 to 2018, by state and territory and Australia %

The health consequences of smoking and exposure to secondhand smoke during pregnancy are discussed in Chapters 3 and 4 respectively. For information on issues related to quitting smoking during pregnancy, refer to Section 7.11.

1.10.2 Smoking and mental illness

Mental health problems are common within the Australian population, with 17.5% of Australians reporting having a mental or behavioural condition in 2014–15.13 Individuals with mental health conditions have a substantially higher prevalence of smoking and those who smoke tend to smoke more heavily than the general population.14,15  Data from the 2019 National Drug Strategy Household Survey showed that Australian adults (18 years and over) who reported having been diagnosed or treated for mental illness in the past year were more than twice as likely to be a current smoker than those who had not been diagnosed or treated in the past year (24.2% vs. 12.9%). 16  These excessive smoking rates contribute to higher levels of tobacco-caused morbidity and mortality among people with mental illness.17 For a detailed overview of smoking and quitting among people with mental illness, see Section 7.12

1.10.3 Single parents

In Australia in 2016, 14% of all families were one-parent families, the vast majority (83%) of which were single female-headed families.18 

In 2019, 29.9% of people aged 14+ years from single-parent households with dependent children were current smokers, compared to 12.2% among households with two parents and dependent children19 —see  Section 1.7 . Single parenthood is associated with social and economic disadvantage,20  and is discussed further in Section 7.19.4  and Chapter 9 .

1.10.4 The homeless

Homelessness is defined as lacking adequate access to safe and secure housing. The 2011 Australian National Census showed that there were about 105,000 homeless people in Australia at that time. 21  

Individuals experiencing homelessness have a poorer health status than the general population, with those who are ‘street homeless’ (those usually dwelling on streets or in parks, in derelict buildings or other temporary shelters) being the worst affected.22 Melbourne-based research has shown a greatly elevated prevalence of smoking among homeless people (77%), with those who are street homeless reporting higher rates of 93%.22  For further discussion refer to Section 7.19.3 and Chapter 9.

1.10.5 The prison population

Traditionally, the prevalence of smoking in the prison population has been far higher than among the general population.23,24  While smoking has decreased substantially over time in the Australian general community, the same is not true for people in custody, whose smoking rates, in facilities which allow smoking, remain high.25 In 2018, two in three (66%–69%) prison entrants aged 18–44 were daily smokers, compared with just one in seven (14%–16%) people of the same age in the general community.25 Only 13% of prison entrants reported never having smoked, while 10% were ex-smokers.25 Within prison, tobacco use is commonly accepted as part of prison life and can often be used as currency in gambling or other trade.26

In 2018, 75% of all prison entrants reported being current smokers, 67% reported being daily smokers, and 85% reported having smoked at some stage in their life. The average age of taking up smoking was 14, although several prisoners reported that they began smoking as young as three.25 Upon entry, female prison entrants (86%) were more likely than male prison entrants (74%) to report they were current smokers. Entrants aged 18–24 were most likely to report being current smokers (80%), with those aged 45 and over the least likely at 62%.25

In 2011, the National Preventative Health Strategy27 identified the prison population as a priority area for future interventions (see Chapter 7 and Chapter 9). As of 2019, all Australian states and territories have introduced or announced intentions to introduce complete smoking bans in prisons, except Western Australia. In 2018, only about one-third (30%) of dischargees from prisons that had banned smoking said they were current smokers, compared with more than half (56%) of dischargees from prisons which allowed smoking.25 However, there was only a two percentage point difference between prison dischargees’ intentions to smoke upon release from prisons that has banned smoking and prisons which allowed smoking (42% and 44% respectively).25

The elevated smoking rates in the prison population reflects the overwhelmingly disadvantaged backgrounds of inmates. Indigenous people, those from low socioeconomic backgrounds, drug users, and the less educated are substantially over-represented in the prison system, as are those suffering mental illness.24-26 As noted elsewhere in this chapter, each of these factors predicts higher smoking rates. For an overview of smoking bans in Australian prisons, see Section 15.4.4.2.1, and for an overview of interventions tailored to prison populations, see Section 7.19.10

1.10.6 Other drug use

Tobacco use commonly co-exists with other drug use.  Data from the National Drug Strategy Household Survey describes the prevalence of drug use among adult smokers and non-smokers in 2016—see Table 1.10.1. Controlling for age and sex, current smokers were more than six times more likely to have used marijuana in the past 12 months than non-smokers, and almost four and a half times more likely to have used any illicit drug (including marijuana) in the year prior to the survey. In 2017, of the secondary school students who reported having used marijuana, amphetamines, hallucinogens or ecstasy, more than one-third said that they had used tobacco concurrently (39%, 36%, 38% and 42%, respectively).28  

Most individuals with substance use disorders smoke tobacco as well.25 International14 and Australian14, 29,30  research shows that in this population, smoking rates range from 68%14 to 90%29  (see also  Section 7.12). A 2015 international systematic review found that smoking rates among people in addiction treatment are more than double those of people with similar demographic characteristics.31  The relationship between tobacco and other drug use is complex, and may be subject to genetic and neurobiological determinants, as well as psychological and social influences.32,33  Cessation interventions tailored to the needs of people with substance use disorders are discussed in Section 7.12.5.4

Table 1.10.1
Past year use of other drugs among current smokers‡ and non-smokers*‡: by sex for Australians aged 18+ years, 2016

 

‡ Smoked daily, weekly or less than weekly
# Includes ex-smokers and never smokers (never smoked 100 cigarettes (manufactured and/or roll-your-own) or the equivalent amount of tobacco)

Source: Centre for Behavioural Research in Cancer analysis of 2016 National Drug Strategy Household Survey data.16

 


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References

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