Parental preconception BMI trajectories from childhood to adolescence and asthma in the future offspring - 05/07/22

Abstract |
Background |
Recent evidence suggests that parental exposures before conception can increase the risk of asthma in offspring.
Objective |
We investigated the association between parents' preconception body mass index (BMI) trajectories from childhood to adolescence and subsequent risk of asthma in their offspring.
Methods |
Using group-based trajectory modeling from the Tasmanian Longitudinal Health Study, we identified BMI trajectories for index participants (parents) when aged 4 years to 15 years. Multinomial regression models adjusted for potential confounders were utilized to estimate the association between these early-life parents' BMI trajectories and asthma phenotypes in their subsequent offspring.
Results |
The main analysis included 1822 parents and 4208 offspring. Four BMI trajectories from age 4 years to 15 years were identified as the best-fitting model: low (8.8%), normal (44.1%), above normal (40.2%), and high (7.0%). Associations were observed between father’s high BMI trajectory and risk of asthma in offspring before the age of 10 years (relative risk ratio [RRR] =1.70 [95% CI = 0.98-2.93]) and also asthma ever (RRR = 1.72 [95% CI = 1.00-2.97]), especially allergic asthma ever (RRR = 2.05 [95% CI = 1.12-3.72]). These associations were not mediated by offspring birth weight. No associations were observed for maternal BMI trajectories and offspring asthma phenotypes.
Conclusion |
This cohort study over 6 decades of life and across 2 generations suggests that the high BMI trajectory in fathers, well before conception, increased the risk of asthma in their offspring.
Le texte complet de cet article est disponible en PDF.Graphical abstract |
Key words : Body mass index, preconception, intergenerational, transgenerational, epigenetics, asthma
Abbreviations used : BMI, GBTM, RRR, TAHS
Plan
| Supported by the National Health and Medical Research Council (NHMRC) of Australia (grants 299901 and 1021275); the University of Melbourne, Australia; the Clifford Craig Foundation, Australia; the Victorian, Queensland, and Tasmanian Asthma Foundations, Australia; Royal Hobart Hospital, Australia; the Helen MacPherson Smith Trust, Australia; GlaxoSmithKline, Australia; and John L. Hopper. G.B., J.P., A.L., C.L., and S.C.D. are funded through the NHMRC of Australia. The sponsors of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report. The corresponding author had full access to all the data in the study and had final responsibility for the decision to submit for publication. |
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| Disclosure of potential conflict of interest: The authors declare that they have no relevant conflicts of interest related to the current work. |
Vol 150 - N° 1
P. 67 - juillet 2022 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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