Education Policy | Post Primary | Preschool | Primary | Tertiary | Search

 


Second-Hand Smoking Increases Risk Of Adult Death

Second-Hand Smoking Increases Risk Of Adult Death By 15 %

New Zealand researchers publish world’s largest study on second-hand smoking and mortality

Adults who have never smoked and who live with smokers have a 15 per cent higher risk of death than those living in a smoke-free household, says Dr Sarah Hill, lead author of a study conducted by the University of Otago’s Wellington School of Medicine and Health Sciences and to be published Monday by the prestigious British Medical Journal.

The research uses New Zealand Census-Mortality Study data for all adult census respondents who had never smoked and were aged 45-74 years at the time of either the 1981 or 1996 population censuses.

Smoking status data was available for all household members aged 15 and over, and death rates were monitored for three years after the two censuses.

Those who had never smoked but who were living in households with one or more current smokers were regarded as being exposed to secondhand smoke in the home. Those living in households with no current smokers were regarded as not exposed.

The findings were conclusive: adults who had never smoked and who lived with smokers had about a 15 per cent higher risk of death than those living in a smoke-free household, even after taking into account differences in age, ethnicity, marital status, and socioeconomic position.

“This result was consistent with previous studies in this area, but what makes it truly significant is that it is more precisely measured than ever before due to its being based on a large study,” Dr Hill says.

“The findings also add to the weight of evidence of harm caused by second-hand smoking, and emphasise the importance of hard-hitting television commercials that are being launched at Parliament on Wednesday,” says Dr Tony Blakely, co-author and principal investigator of the New Zealand Census-Mortality Study.

The television commercials urge parents to protect their children from second-hand smoke by either quitting or smoking outside. The commercials are funded by the Ministry of Health and developed by the Health Sponsorship Council and The Quit Group.


BACKGROUND AND OTHER QUESTIONS

What data did the researchers use to arrive at their conclusions? The study authors used information from the 1981 and 1996 New Zealand censuses, anonymously linking this with routinely collected death records from 1981-1984 and 1996-1999. This information forms part of the New Zealand Census-Mortality Study (NZCMS) that is conducted in collaboration with Statistics New Zealand. The NZCMS was funded by the Health Research Council of New Zealand, and is now funded by the Ministry of Health and the University of Otago. More information on the NZCMS can be found at: www.wnmeds.ac.nz/nzcms-info.html

So how many New Zealanders die each year from second-hand smoking? This study looked at mortality only among adult non-smokers aged 44 to 77 years. Second-hand smoking has adverse health effects on other age groups, including children. Other researchers have estimated the total number of deaths caused by second-hand smoking in New Zealand: this is thought to be around 347 per year. The NZCMS research findings published on Monday are consistent with this previous estimate.

What does this study add to what we already know? This is the largest study to examine the risk of mortality in second-hand smokers. Its findings are consistent with previous smaller studies, but because of its larger size the results have a higher degree of statistical accuracy. This adds considerable weight to the existing evidence of harm caused by exposure to second-hand smoke.

Where can I find the actual study? The study will be electronically published at www.bmj.com late on Monday 7 April. The actual hardcopy publication will appear in late April.

Hill, S., Blakely, T., Woodward, A., & Kawachi, I. British Medical Journal. Increased mortality amongst never-smokers living with smokers: evidence from two New Zealand cohorts 1981-84 and 1996-99.

Who else could speak knowledgeably about these results to the media? Professor Alistair Woodward University of Auckland Tel: 64 9 373-7599, extn: 86361 Mobile: 027 490-5954 Email: a.woodward@auckland .ac.nz (Professor Woodward is a co-author of the study, and has an extensive track record of tobacco-related research and policy-advice. He is also a past-member of the National Health Committee.)

Iain Potter, Director, Health Sponsorship Council Tel: 64 4 472-5777 Mobile: 027 446-4103 (Mr Potter is co-ordinating the second-hand smoke campaign that is being launched on Wednesday 7 April.)


What do the results actually look like?

Fig: Death rates per 100,000 for never-smoking adults by household second-hand smoking exposure, adjusted for age and ethnicity

The Figure shows that for both sexes, and in both 1981-84 and 1996-99, never smokers living in households with one or more smokers have higher death rates than never smokers living in smoke free households.

Put another way, the death rate among adult never smokers exposed to second-hand smoking compared to never smokers living in smoke-free homes was: 10 per cent for males in 1981-84 4 per cent for females in 1981-84 17 per cent for males in 1996-99 27 per cent for females in 1996-99

These results for 1981-84 were of borderline statistical significance in 1981-84, but were clearly statistically significant in 1996-99.

© Scoop Media

 
 
 
 
 
Culture Headlines | Health Headlines | Education Headlines

 

Electronica: Restoring The World’s First Recorded Computer Music

University of Canterbury Distinguished Professor Jack Copeland and UC alumni and composer Jason Long have restored the earliest known recording of computer-generated music, created more than 65 years ago using programming techniques devised by Alan Turing. More>>

ALSO:

Scoop Review Of Books: Almost Getting Away With Murder

The Black Widow by Lee-Anne Cartier: Lee-Anne Cartier is the sister of the Christchurch man found to have been murdered by his wife, Helen Milner, after an initial assumption by police that his death, in 2009, was suicide. More>>

Howard Davis: Triple Echo - The Malevich/Reinhardt/Hotere Nexus

Howard Davis: The current juxtaposition of works by Ralph Hotere and Ad Reinhardt at Te Papa perfectly exemplifies Jean Michel Massing's preoccupation with the transmigration of imagery in a remarkable triple echo effect... More>>

Scoop Review Of Books: Nō Tāu Manawa

Vaughan Rapatahana responds to Fale Aitu | Spirit House by Tusiata Avi: "fa’afetai Tusiata, fa’afetai, / you’ve swerved & served us a masterclass corpus / through graft / of tears & fears..." More>>

9 Golds - 21 Medals: NZ Team Celebrates As Rio 2016 Paralympic Games Close

The entire New Zealand Paralympic Team, led by kiwi sprinter and double gold medallist Liam Malone as flag bearer, are on the bus to the Maracanã Stadium in Rio de Janeiro for the Closing Ceremony of the Rio 2016 Paralympic Games. There, they will celebrate the fantastic successes of the past 10 days. More>>

ALSO:

New Zealand Improv Festival: The Festival Of Moments To Return To The Capital

The eighth incarnation of the New Zealand Improv Festival comes to BATS Theatre this 4-8 October , with a stellar line-up of spontaneous theatre and instant comedy performed and directed by top improvisors from around New Zealand and the world. More>>

ALSO:

Get More From Scoop

 
 

LATEST HEADLINES

 
 
 
 
Education
Search Scoop  
 
 
Powered by Vodafone
NZ independent news