Smoking reduction intervention in a large population-based study. The Inter99 study.
BACKGROUND
Smoking reduction has been introduced as an alternative to smokers unable or unwilling to quit but has never been implemented in a population-based intervention.


METHODS
Two thousand four hundred eight daily smokers in all motivational stages were included in a randomised population-based intervention study, in Copenhagen, Denmark. Smokers, unwilling or unable to quit, were encouraged to reduce their tobacco consumption. Furthermore, smokers in the high-intensity intervention were offered participation in smoking reduction groups.


RESULTS
Twenty-three percent of those who attended both baseline and 1 year visit reported reduction by at least 5 g and 8% reported a halving or more. Halving of tobacco consumption was achieved significantly more often than in the background population, OR = 2.6 (1.6-4.4), even when assuming that non-participants had not reduced, OR = 1.7 (1.0-2.8). Reduction of at least 5 g doubled the probability of increased motivation to quit and a halving increased it more than four times. The reductions were not validated. Less than 2% attended the smoking reduction groups.


CONCLUSIONS
The smoking reduction intervention was significant in self-reported reduction of tobacco consumption and subsequently increased motivation to quit. This may open new perspectives, with reduction as a first step towards cessation, a possible supplement to smoking cessation strategies.
Pisinger
Charlotta
C
Research Centre for Prevention and Health, Glostrup University Hospital, DK-2600 Glostrup, Denmark. chpi@glostruphosp.kbhamt.dk
Vestbo
Jørgen
J
Borch-Johnsen
Knut
K
Jørgensen
Torben
T
D000328:Adult; D001294:Attitude to Health; D003718:Denmark / Q000453:epidemiology; D006801:Humans; D008019:Life Style; D008875:Middle Aged; D009042:Motivation; D012907:Smoking / Q000453:epidemiology; D016540:Smoking Cessation / Q000523:psychology; D000074606:Smoking Prevention