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Eur Respir J. 2015 Mar;45(3):661-9. doi: 10.1183/09031936.00041714. Epub 2014 Dec 10.

Is parent-child bed-sharing a risk for wheezing and asthma in early childhood?

Author information

1
School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, Rotterdam, The Netherlands The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands luijk@fsw.eur.nl.
2
The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Pediatrics, Division of Respiratory Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
3
School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, Rotterdam, The Netherlands The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands.
4
Dept of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center, Rotterdam, The Netherlands Institute of Psychology, Erasmus University Rotterdam, Rotterdam, The Netherlands.
5
Dept of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center, Rotterdam, The Netherlands.
6
Dept of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.
7
The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Pediatrics, Erasmus University Medical Center, Rotterdam, The Netherlands.
8
Dept of Pediatrics, Erasmus University Medical Center, Rotterdam, The Netherlands.
9
School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, Rotterdam, The Netherlands Center for Child and Family Studies, Leiden University, Leiden, The Netherlands.
10
The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Pediatrics, Division of Respiratory Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Pediatrics, Division of Neonatology, Erasmus University Medical Center, Rotterdam, The Netherlands.
11
Dept of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands Dept of Psychiatry, Erasmus University Medical Center, Rotterdam, The Netherlands.

Abstract

Household crowding can place young children at risk for respiratory infections which subsequently provoke asthma symptoms. However, crowding might also protect against asthma, in accordance with the hygiene hypothesis. We tested if parent-infant bed-sharing, an important dimension of household crowding, increases or decreases the risk for asthma. In a population-based prospective cohort (N = 6160) we assessed bed-sharing at 2 and 24 months; wheezing between 1 and 6 years of age; and asthma at 6 years of age. Generalised estimating equation models were used to assess repeated measures of wheezing and asthma. We found no association between bed-sharing in early infancy and wheezing or diagnosis of asthma. By contrast, we found a positive association between bed-sharing in toddlerhood and both wheezing (OR 1.42, 95% CI 1.15-1.74) and asthma (OR 1.57, 95% CI 1.03-2.38). Wheezing was not associated with bed-sharing when using cross-lagged modelling. This study suggests that bed-sharing in toddlerhood is associated with an increased risk of asthma at later ages, and not vice versa. Further studies are needed to explore the underlying causal mechanisms.

PMID:
25504998
DOI:
10.1183/09031936.00041714
[Indexed for MEDLINE]
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