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The long‐term effect of a population‐based life‐style intervention on smoking and alcohol consumption. The Inter99 Study—a randomized controlled trial
Author(s) -
Baumann Sophie,
Toft Ulla,
Aadahl Mette,
Jørgensen Torben,
Pisinger Charlotta
Publication year - 2015
Publication title -
addiction
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.424
H-Index - 193
eISSN - 1360-0443
pISSN - 0965-2140
DOI - 10.1111/add.13052
Subject(s) - abstinence , binge drinking , medicine , discontinuation , randomized controlled trial , population , confidence interval , demography , brief intervention , poison control , psychiatry , injury prevention , environmental health , sociology
Aims To examine whether improvements in smoking and alcohol consumption throughout the 5‐year course of a population‐based multi‐factorial life‐style intervention were sustained 5 years after its discontinuation. Design Population‐based randomized controlled trial. Setting Suburbs of Copenhagen, Denmark. Participants A total of 9415 people aged 30–60 years were randomized to an intervention group ( n = 6091) and an assessment‐only control group ( n = 3324). Intervention All participants in the intervention group received screening, risk assessment and individual life‐style counselling; participants at high risk of ischaemic heart disease—according to pre‐specified criteria—were also offered group‐based counselling. Measurements Self‐reported point abstinence from smoking as well as changes in the average alcohol consumption per week and binge drinking in the past week from baseline to 10‐year follow‐up were investigated using random‐effects modelling. Findings At 10‐year follow up, people in the intervention group reported a higher smoking abstinence rate [odds ratio (OR) = 1.84, 95% confidence interval (CI) = 1.02–3.33, P = 0.043] and a greater reduction in binge drinking (net change = –0.08 days with binge drinking in the last week, 95% CI = –0.16 to –0.01, P = 0.028) than in the control group. There were no detectable long‐term intervention effects on the average alcohol consumption per week. Conclusions A population‐based multi‐factorial life‐style intervention of 5 years’ duration in Denmark had sustained beneficial effects on smoking abstinence and binge drinking 5 years after its discontinuation.