Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses
OBJECTIVES Smoke-free areas have expanded and related campaigns have been implemented since 1995 in Korea. As a result, household secondhand smoke (SHS) exposure has decreased over the past 15 years. We assessed the cohort effect, the effect of a 2008 campaign on household SHS exposure, and the impa...
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Korean Society of Epidemiology
2023-12-01
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| Series: | Epidemiology and Health |
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| Online Access: | http://www.e-epih.org/upload/pdf/epih-46-e2024009.pdf |
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| author | Hana Kim Heewon Kang Sung-il Cho |
| author_facet | Hana Kim Heewon Kang Sung-il Cho |
| author_sort | Hana Kim |
| collection | DOAJ |
| description | OBJECTIVES Smoke-free areas have expanded and related campaigns have been implemented since 1995 in Korea. As a result, household secondhand smoke (SHS) exposure has decreased over the past 15 years. We assessed the cohort effect, the effect of a 2008 campaign on household SHS exposure, and the impact of a complete smoking ban in public places along with increased penalties, as implemented in December 2011. METHODS Nationally representative cross-sectional 15-wave survey data of Korean adolescents were used. The 810,516 participants were classified into 6 grade groups, 15 period groups, and 20 middle school admission cohorts. An age-period-cohort analysis, conducted with the intrinsic estimator method, was used to assess the cohort effect of household SHS exposure, and interrupted-time series analyses were conducted to evaluate the effects of the smoke-free policy and the campaign. RESULTS For cohorts who entered middle school from 2002 to 2008, the risk of household SHS exposure decreased among both boys and girls. Immediately after implementation of the smoke-free policy, the prevalence of household SHS exposure by period decreased significantly for boys (coefficient, -8.96; p<0.05) and non-significantly for girls (coefficient, -6.99; p=0.07). After the campaign, there was a significant decrease in household SHS exposure by cohort among boys, both immediately and post-intervention (coefficient, -4.84; p=0.03; coefficient, -1.22; p=0.02, respectively). CONCLUSIONS A school-admission-cohort effect was found on household SHS exposure among adolescents, which was associated with the smoke-free policy and the campaign. Anti-smoking interventions should be implemented consistently and simultaneously. |
| format | Article |
| id | doaj-art-e7b2e9ff142c4b2e99f9c6f1dc7d0df4 |
| institution | OA Journals |
| issn | 2092-7193 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Korean Society of Epidemiology |
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| series | Epidemiology and Health |
| spelling | doaj-art-e7b2e9ff142c4b2e99f9c6f1dc7d0df42025-08-20T02:13:26ZengKorean Society of EpidemiologyEpidemiology and Health2092-71932023-12-014610.4178/epih.e20240091472Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analysesHana Kim0Heewon Kang1Sung-il Cho2 Department of Public Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Korea Institute of Health and Environment, Seoul National University, Seoul, Korea Department of Public Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, KoreaOBJECTIVES Smoke-free areas have expanded and related campaigns have been implemented since 1995 in Korea. As a result, household secondhand smoke (SHS) exposure has decreased over the past 15 years. We assessed the cohort effect, the effect of a 2008 campaign on household SHS exposure, and the impact of a complete smoking ban in public places along with increased penalties, as implemented in December 2011. METHODS Nationally representative cross-sectional 15-wave survey data of Korean adolescents were used. The 810,516 participants were classified into 6 grade groups, 15 period groups, and 20 middle school admission cohorts. An age-period-cohort analysis, conducted with the intrinsic estimator method, was used to assess the cohort effect of household SHS exposure, and interrupted-time series analyses were conducted to evaluate the effects of the smoke-free policy and the campaign. RESULTS For cohorts who entered middle school from 2002 to 2008, the risk of household SHS exposure decreased among both boys and girls. Immediately after implementation of the smoke-free policy, the prevalence of household SHS exposure by period decreased significantly for boys (coefficient, -8.96; p<0.05) and non-significantly for girls (coefficient, -6.99; p=0.07). After the campaign, there was a significant decrease in household SHS exposure by cohort among boys, both immediately and post-intervention (coefficient, -4.84; p=0.03; coefficient, -1.22; p=0.02, respectively). CONCLUSIONS A school-admission-cohort effect was found on household SHS exposure among adolescents, which was associated with the smoke-free policy and the campaign. Anti-smoking interventions should be implemented consistently and simultaneously.http://www.e-epih.org/upload/pdf/epih-46-e2024009.pdfage-period-cohort analysisinterrupted time series analysissegmented regressionsecondhand smokingadolescents |
| spellingShingle | Hana Kim Heewon Kang Sung-il Cho Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses Epidemiology and Health age-period-cohort analysis interrupted time series analysis segmented regression secondhand smoking adolescents |
| title | Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses |
| title_full | Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses |
| title_fullStr | Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses |
| title_full_unstemmed | Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses |
| title_short | Decrease in household secondhand smoking among Korean adolescents associated with smoke-free policies: grade-period-cohort and interrupted time series analyses |
| title_sort | decrease in household secondhand smoking among korean adolescents associated with smoke free policies grade period cohort and interrupted time series analyses |
| topic | age-period-cohort analysis interrupted time series analysis segmented regression secondhand smoking adolescents |
| url | http://www.e-epih.org/upload/pdf/epih-46-e2024009.pdf |
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