University of Newcastle Public Health studies effects second-hand smoke
A study of cigarette smoke exposure in multi-unit housing by HMRI Public Health researcher Associate Professor Billie Bonevski has been instrumental in achieving proposed NSW Strata by-law reforms banning smoking in common areas.
In a paper published in the international journal Preventive Medicine, Associate Professor Bonevski, from the University of Newcastle, drew extensive data from almost 161,000 participants in the NSW-wide “45 and Up” study.
Among this group, more than 12,000 people, including 8,000 non-smokers, were routinely exposed to smoke in their homes for eight hours or more per week—more than 7,000 were exposed for at least eight hours per day.
Multi-unit dwellers were 19 per cent more likely to be exposed than those living in houses, with women more likely to be exposed than men because they tend to spend more time at home.
Associate Professor Bonevski said the study resulted from an approach by the former ASH Australia health group seeking reliable data on second-hand smoke exposure.
“I was surprised by the number of people reporting exposure to second-hand smoke in their homes and workplaces because we tend to think of Australia as a mostly non-smoking society with a lot of existing restrictions on smoking in public places,” she said.
“It wasn’t surprising, however, that we found exposure was highest among those living in postcode areas classified as lower socio-economic status. In Australia the general population smoking rate is fifteen to eighteen per cent whereas among low-income earners, the unemployed and those with mental illness, for example, rates are fifty per cent and as high as ninety per cent.
“A lot of government-subsidized buildings are occupied by those from socially disadvantaged groups so the non-smoking residents are really at high risk of being exposed to toxic, carcinogenic nicotine drift.”
University of Newcastle Public Health School’s Associate Professor Bonevski said that previous international research had tracked how nicotine travels through buildings via elevator shafts, stairwells, air-conditioning systems and even under balcony doors.
Living in a smoky environment tended to increase take-up rates and make it harder for people to quit. Approximately 10,000 participants in the study had children residing with them in the unit.
“It’s the best feeling, as a researcher, to see the NSW Government respond,” Associate Professor Bonevski said. “The data is good, solid, conclusive evidence that second-hand smoking is a problem, and for those results to be taken up by policy makers is the reason we do what we do.”
The NSW Government is expected to introduce the by-laws in mid-2014.