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Monday, 08.09.2014
Longitudinal studies of respiratory disease
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The influence of heredity on the persistence and onset-age of asthma
E. M. S. Paaso, M. S. Jaakkola, A. K. Rantala, T. T. Hugg, J. J. K. Jaakkola (Oulu, Finland)
Source:
International Congress 2014 – Longitudinal studies of respiratory disease
Session:
Longitudinal studies of respiratory disease
Session type:
Poster Discussion
Number:
2990
Disease area:
Airway diseases, Paediatric lung diseases
Abstract
Background:
Parental asthma has been linked to personal asthma previously, but the effects of heredity on the persistence and onset-age of asthma until young adulthood need further studies.
Objectives:
We investigated the influence of heredity on transient vs. persistent and early-onset vs. late-onset asthma in the Espoo Cohort Study 20-year follow-up of 1623 people (63.2% of the baseline).
Methods:
Asthmatics (n = 220) were divided into
persistent asthma
according to symptoms and/or medication in the follow-ups after the initial diagnosis of asthma and
transient
if otherwise. Persistent asthma was divided into early- and late-onset asthma using the age of 13 years as cut-point. The determinants were
any heredity
(any parent or sibling);
maternal; paternal; both parents; siblings only; parents only
and
both siblings and parents
. Adjusted risk ratios (RR
a
) were calculated with Poisson regression and Q-statistics to calculate heterogeneity between RRs.
Results:
Heredity influenced all the subtypes but in various ways. Most hereditary determinants had a stronger impact on persistent asthma than transient, but
siblings only
had a similar impact on both (persistent: RR
a
= 2.16, 95% CI = 1.27-3.68; transient: RR
a
= 2.10, 95% CI = 1.15-3.86; heterogeneity
P =
0.95).
Maternal asthma
seemed to effect only early-onset asthma (RR
a
= 2.75, 95% CI = 1.62-4.69) while the impact of
paternal asthma
continued (early: RR
a
= 2.28, 95% CI = 1.15-4.53; late: RR
a
= 1.98, 95% CI = 0.76-5.15; heterogeneity
P
= 0.81).
Conclusions:
Heredity plays the most important role in persistent and early-onset asthma. The impact of paternal asthma continues to young adulthood while the influence of maternal asthma decreases with age.
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Citations should be made in the following way:
E. M. S. Paaso, M. S. Jaakkola, A. K. Rantala, T. T. Hugg, J. J. K. Jaakkola (Oulu, Finland). The influence of heredity on the persistence and onset-age of asthma. Eur Respir J 2014; 44: Suppl. 58, 2990
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