Conference Paper: Social mobility and adiposity in a recently transitioned population of Hong Kong: evidence from the FAMILY cohort

TitleSocial mobility and adiposity in a recently transitioned population of Hong Kong: evidence from the FAMILY cohort
Authors
Issue Date2014
PublisherIEA Congress of Epidemiology, The Conference program's website is located at https://wce.confex.com/wce/2014/webprogram/meeting.html
Citation
The 20th IEA Congress of Epidemiology, Anchorage, AK., 17-21 August 2014. How to Cite?
AbstractINTRODUCTION: While social mobility, particularly downward movement in social hierarchy, has been associated with adiposity in long-term industrialized populations, evidence from recently transitioned populations is inconsistent. In a recently developed population from Hong Kong we examined the association of social mobility, assessed using life course socio-economic position (SEP) trajectories, with general adiposity, proxied by body mass index (BMI) and central adiposity, proxied by waist circumference and waist-hip ratio (WHR). METHODS: In a cross-sectional study of 2,965 adults from 1,554 households, aged 20-80 years from the population-based FAMILY Cohort (Wave 2; 2012-13), we used multilevel linear regression models, adjusted for age, smoking status, use of alcohol, physical activity and family functioning, to assess the association of SEP trajectories with BMI, waist circumference and WHR using four combinations of low and high SEP in childhood (fathers’ occupation at age 10 years) and adulthood (highest attained education). Multilevel models account for the hierarchical structure of our data, where individuals are nested within households, allowing for household level variation in the outcomes. We assessed whether the associations varied by sex or age from the heterogeneity across strata and the significance of the relevant interaction term in an adjusted model including interactions of sex or age. RESULTS: Association of life course SEP with adiposity varied by sex (p-value <0.01). Compared to men with consistently low SEP, upwardly mobile men had higher BMI (0.82, 95% confidence interval (CI) 0.15 to 1.49) as did men with consistently high SEP, (0.83, 95% CI 0.20 to 1.45), who also had larger waist circumference (1.99 centimetre (cm), 95% CI 0.40 to 3.50). In women, upward social mobility was negatively associated with adiposity; women with consistently high SEP had the lowest WHR (-0.02, 95% CI -0.03 to -0.01) and waist circumference (-2.44 cm, 95% CI -3.87 to -1.00). CONCLUSIONS: This study shows that social mobility and social disadvantage have sex-specific associations with particularly central adiposity in the recently transitioned population of Hong Kong. Accumulation of disadvantage across the life course was associated with central adiposity in women but not men. Exposures during puberty could be a mechanism driving such sex-specific associations.
DescriptionConference Theme: Global Epidemiology in a Changing Environment: the Circumpolar Perspective
Tuesday Poster Session
Persistent Identifierhttp://hdl.handle.net/10722/206901

 

DC FieldValueLanguage
dc.contributor.authorKavikondala, S-
dc.contributor.authorNi, MY-
dc.contributor.authorLam, TH-
dc.contributor.authorSchooling, CM-
dc.contributor.authorLeung, GM-
dc.date.accessioned2014-12-03T02:16:25Z-
dc.date.available2014-12-03T02:16:25Z-
dc.date.issued2014-
dc.identifier.citationThe 20th IEA Congress of Epidemiology, Anchorage, AK., 17-21 August 2014.-
dc.identifier.urihttp://hdl.handle.net/10722/206901-
dc.descriptionConference Theme: Global Epidemiology in a Changing Environment: the Circumpolar Perspective-
dc.descriptionTuesday Poster Session-
dc.description.abstractINTRODUCTION: While social mobility, particularly downward movement in social hierarchy, has been associated with adiposity in long-term industrialized populations, evidence from recently transitioned populations is inconsistent. In a recently developed population from Hong Kong we examined the association of social mobility, assessed using life course socio-economic position (SEP) trajectories, with general adiposity, proxied by body mass index (BMI) and central adiposity, proxied by waist circumference and waist-hip ratio (WHR). METHODS: In a cross-sectional study of 2,965 adults from 1,554 households, aged 20-80 years from the population-based FAMILY Cohort (Wave 2; 2012-13), we used multilevel linear regression models, adjusted for age, smoking status, use of alcohol, physical activity and family functioning, to assess the association of SEP trajectories with BMI, waist circumference and WHR using four combinations of low and high SEP in childhood (fathers’ occupation at age 10 years) and adulthood (highest attained education). Multilevel models account for the hierarchical structure of our data, where individuals are nested within households, allowing for household level variation in the outcomes. We assessed whether the associations varied by sex or age from the heterogeneity across strata and the significance of the relevant interaction term in an adjusted model including interactions of sex or age. RESULTS: Association of life course SEP with adiposity varied by sex (p-value <0.01). Compared to men with consistently low SEP, upwardly mobile men had higher BMI (0.82, 95% confidence interval (CI) 0.15 to 1.49) as did men with consistently high SEP, (0.83, 95% CI 0.20 to 1.45), who also had larger waist circumference (1.99 centimetre (cm), 95% CI 0.40 to 3.50). In women, upward social mobility was negatively associated with adiposity; women with consistently high SEP had the lowest WHR (-0.02, 95% CI -0.03 to -0.01) and waist circumference (-2.44 cm, 95% CI -3.87 to -1.00). CONCLUSIONS: This study shows that social mobility and social disadvantage have sex-specific associations with particularly central adiposity in the recently transitioned population of Hong Kong. Accumulation of disadvantage across the life course was associated with central adiposity in women but not men. Exposures during puberty could be a mechanism driving such sex-specific associations.-
dc.languageeng-
dc.publisherIEA Congress of Epidemiology, The Conference program's website is located at https://wce.confex.com/wce/2014/webprogram/meeting.html-
dc.relation.ispartof20th IEA Congress of Epidemiology-
dc.titleSocial mobility and adiposity in a recently transitioned population of Hong Kong: evidence from the FAMILY cohorten_US
dc.typeConference_Paperen_US
dc.identifier.emailKavikondala, S: sushma@hku.hk-
dc.identifier.emailNi, MY: nimy@hku.hk-
dc.identifier.emailLam, TH: hrmrlth@hku.hk-
dc.identifier.emailSchooling, CM: cms1@hkucc.hku.hk-
dc.identifier.emailLeung, GM: gmleung@hku.hk-
dc.description.naturelink_to_OA_fulltext-
dc.publisher.placeUnited States-

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