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Effects of body mass index on relationship status, social contact, and socioeconomic position: Mendelian Randomization and within-family study in UK Biobank

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Effects of body mass index on relationship status, social contact, and socioeconomic position : Mendelian Randomization and within-family study in UK Biobank. / Howe, Laura D; Kanayalal, Roshni; Harrison, Sean; Beaumont, Robin N; Davies, Alisha R; Frayling, Timothy; Davies, Neil M; Hughes, Amanda M M; Jones, Samuel E; Sassi, Franco; Wood, Andrew R; Tyrrell, Jessica.

In: International Journal of Epidemiology, 04.12.2019.

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Howe, Laura D ; Kanayalal, Roshni ; Harrison, Sean ; Beaumont, Robin N ; Davies, Alisha R ; Frayling, Timothy ; Davies, Neil M ; Hughes, Amanda M M ; Jones, Samuel E ; Sassi, Franco ; Wood, Andrew R ; Tyrrell, Jessica. / Effects of body mass index on relationship status, social contact, and socioeconomic position : Mendelian Randomization and within-family study in UK Biobank. In: International Journal of Epidemiology. 2019.

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@article{7d454779d2f34fc0942c34db3aa4d9fc,
title = "Effects of body mass index on relationship status, social contact, and socioeconomic position: Mendelian Randomization and within-family study in UK Biobank",
abstract = "BackgroundWe assessed whether body mass index (BMI) affects social andsocioeconomic outcomes.MethodsWe used Mendelian Randomization (MR), non-linear MR and non-genetic and MR within-sibling analyses, to estimate relationships of BMI with six socioeconomic and four social outcomes in 378,244 people of European ancestry in UK Biobank.ResultsIn MR of minimally-related individuals, higher BMI was related to higher deprivation, lower income, fewer years of education, lower odds of degree-level education and skilled employment. Non-linear MR suggested both low (bottom decile, <22kg/m2) and high BMI (top seven deciles, >24.6kg/m2) increase deprivation and reduce income. Non-genetic within-sibling analysis supported an effect of BMI on SEP; precision in within-sibling MR was too low to draw inference about effects of BMI on SEP. There was some evidence of pleiotropy, with MR Egger suggesting limited effects of BMI on deprivation, althoughprecision of these estimates is also low. Non-linear MR suggested that low BMI (bottom three deciles, <23.5kg/m2) reduces the odds of cohabiting with a partner or spouse in men, whereas high BMI (top two deciles, >30.7kg/m2) reduces the odds of cohabitation in women. Both non-genetic and MR within-sibling analysis supported this sex-specific effect of BMI on cohabitation. In men only, higher BMI was related to lower participation in leisure and socialactivities. There was little evidence that BMI affects visits from friends and family or having someone to confide in.ConclusionsBMI may affect social and socioeconomic outcomes, with both high and low BMI being detrimental for SEP, although larger within-family MR studies may help to test the robustness of MR results in unrelated individuals. Triangulation of evidence across MR and within-family analyses supports evidence of a sex-specific effect of BMI on cohabitation.",
keywords = "body mass index, obesity, socioeconomic, cohabitation, social contact, siblings, Mendelian randomisation",
author = "Howe, {Laura D} and Roshni Kanayalal and Sean Harrison and Beaumont, {Robin N} and Davies, {Alisha R} and Timothy Frayling and Davies, {Neil M} and Hughes, {Amanda M M} and Jones, {Samuel E} and Franco Sassi and Wood, {Andrew R} and Jessica Tyrrell",
year = "2019",
month = "12",
day = "4",
doi = "10.1093/ije/dyz240",
language = "English",
journal = "International Journal of Epidemiology",
issn = "0300-5771",
publisher = "Oxford University Press",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Effects of body mass index on relationship status, social contact, and socioeconomic position

T2 - Mendelian Randomization and within-family study in UK Biobank

AU - Howe, Laura D

AU - Kanayalal, Roshni

AU - Harrison, Sean

AU - Beaumont, Robin N

AU - Davies, Alisha R

AU - Frayling, Timothy

AU - Davies, Neil M

AU - Hughes, Amanda M M

AU - Jones, Samuel E

AU - Sassi, Franco

AU - Wood, Andrew R

AU - Tyrrell, Jessica

PY - 2019/12/4

Y1 - 2019/12/4

N2 - BackgroundWe assessed whether body mass index (BMI) affects social andsocioeconomic outcomes.MethodsWe used Mendelian Randomization (MR), non-linear MR and non-genetic and MR within-sibling analyses, to estimate relationships of BMI with six socioeconomic and four social outcomes in 378,244 people of European ancestry in UK Biobank.ResultsIn MR of minimally-related individuals, higher BMI was related to higher deprivation, lower income, fewer years of education, lower odds of degree-level education and skilled employment. Non-linear MR suggested both low (bottom decile, <22kg/m2) and high BMI (top seven deciles, >24.6kg/m2) increase deprivation and reduce income. Non-genetic within-sibling analysis supported an effect of BMI on SEP; precision in within-sibling MR was too low to draw inference about effects of BMI on SEP. There was some evidence of pleiotropy, with MR Egger suggesting limited effects of BMI on deprivation, althoughprecision of these estimates is also low. Non-linear MR suggested that low BMI (bottom three deciles, <23.5kg/m2) reduces the odds of cohabiting with a partner or spouse in men, whereas high BMI (top two deciles, >30.7kg/m2) reduces the odds of cohabitation in women. Both non-genetic and MR within-sibling analysis supported this sex-specific effect of BMI on cohabitation. In men only, higher BMI was related to lower participation in leisure and socialactivities. There was little evidence that BMI affects visits from friends and family or having someone to confide in.ConclusionsBMI may affect social and socioeconomic outcomes, with both high and low BMI being detrimental for SEP, although larger within-family MR studies may help to test the robustness of MR results in unrelated individuals. Triangulation of evidence across MR and within-family analyses supports evidence of a sex-specific effect of BMI on cohabitation.

AB - BackgroundWe assessed whether body mass index (BMI) affects social andsocioeconomic outcomes.MethodsWe used Mendelian Randomization (MR), non-linear MR and non-genetic and MR within-sibling analyses, to estimate relationships of BMI with six socioeconomic and four social outcomes in 378,244 people of European ancestry in UK Biobank.ResultsIn MR of minimally-related individuals, higher BMI was related to higher deprivation, lower income, fewer years of education, lower odds of degree-level education and skilled employment. Non-linear MR suggested both low (bottom decile, <22kg/m2) and high BMI (top seven deciles, >24.6kg/m2) increase deprivation and reduce income. Non-genetic within-sibling analysis supported an effect of BMI on SEP; precision in within-sibling MR was too low to draw inference about effects of BMI on SEP. There was some evidence of pleiotropy, with MR Egger suggesting limited effects of BMI on deprivation, althoughprecision of these estimates is also low. Non-linear MR suggested that low BMI (bottom three deciles, <23.5kg/m2) reduces the odds of cohabiting with a partner or spouse in men, whereas high BMI (top two deciles, >30.7kg/m2) reduces the odds of cohabitation in women. Both non-genetic and MR within-sibling analysis supported this sex-specific effect of BMI on cohabitation. In men only, higher BMI was related to lower participation in leisure and socialactivities. There was little evidence that BMI affects visits from friends and family or having someone to confide in.ConclusionsBMI may affect social and socioeconomic outcomes, with both high and low BMI being detrimental for SEP, although larger within-family MR studies may help to test the robustness of MR results in unrelated individuals. Triangulation of evidence across MR and within-family analyses supports evidence of a sex-specific effect of BMI on cohabitation.

KW - body mass index

KW - obesity

KW - socioeconomic

KW - cohabitation

KW - social contact

KW - siblings

KW - Mendelian randomisation

U2 - 10.1093/ije/dyz240

DO - 10.1093/ije/dyz240

M3 - Article

JO - International Journal of Epidemiology

JF - International Journal of Epidemiology

SN - 0300-5771

M1 - dyz240

ER -