Comparison of intergenerational instrumental variable analyses of body mass index and mortality in UK Biobank.
Comparison of intergenerational instrumental variable analyses of body mass index and mortality in UK Biobank.
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DOI:
10.1093/ije/dyac159
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发表时间:
2023-04-19
影响因子:
7.7
通讯作者:
中科院分区:
文献类型:
--
作者:
An increasing proportion of people have a body mass index (BMI) classified as overweight or obese and published studies disagree whether this will be beneficial or detrimental to health. We applied and evaluated two intergenerational instrumental variable methods to estimate the average causal effect of BMI on mortality in a cohort with many deaths: the parents of UK Biobank participants. In Cox regression models, parental BMI was instrumented by offspring BMI using an ‘offspring as instrument’ (OAI) estimation and by offspring BMI-related genetic variants in a ‘proxy-genotype Mendelian randomization’ (PGMR) estimation. Complete-case analyses were performed in parents of 233 361 UK Biobank participants with full phenotypic, genotypic and covariate data. The PGMR method suggested that higher BMI increased mortality with hazard ratios per kg/m2 of 1.02 (95% CI: 1.01, 1.04) for mothers and 1.04 (95% CI: 1.02, 1.05) for fathers. The OAI method gave considerably higher estimates, which varied according to the parent–offspring pairing between 1.08 (95% CI: 1.06, 1.10; mother–son) and 1.23 (95% CI: 1.16, 1.29; father–daughter). Both methods supported a causal role of higher BMI increasing mortality, although caution is required regarding the immediate causal interpretation of these exact values. Evidence of instrument invalidity from measured covariates was limited for the OAI method and minimal for the PGMR method. The methods are complementary for interrogating the average putative causal effects because the biases are expected to differ between them.
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影响因子:
64.8
作者:
Bycroft C;Freeman C;Petkova D;Band G;Elliott LT;Sharp K;Motyer A;Vukcevic D;Delaneau O;O'Connell J;Cortes A;Welsh S;Young A;Effingham M;McVean G;Leslie S;Allen N;Donnelly P;Marchini J
通讯作者:
Marchini J
影响因子:
5
作者:
Fry A;Littlejohns TJ;Sudlow C;Doherty N;Adamska L;Sprosen T;Collins R;Allen NE
通讯作者:
Allen NE
影响因子:
2.1
作者:
Bowden J;Davey Smith G;Haycock PC;Burgess S
通讯作者:
Burgess S
DOI:
10.1097/ede.0000000000000559
发表时间:
2017-01
期刊:
Epidemiology (Cambridge, Mass.)
影响因子:
--
作者:
Burgess S;Bowden J;Fall T;Ingelsson E;Thompson SG
通讯作者:
Thompson SG
DOI:
10.1136/bmj.i2716
发表时间:
2016-06-14
期刊:
BMJ (Clinical research ed.)
影响因子:
--
作者:
Aune D;Keum N;Giovannucci E;Fadnes LT;Boffetta P;Greenwood DC;Tonstad S;Vatten LJ;Riboli E;Norat T
通讯作者:
Norat T