5 research outputs found
MIGRATION AND HOME OWNERSHIP
It is well known that home ownership has an impeding effect on migration. However, the strong increase in home ownership in the Netherlands since the Second World War has not led to a decrease in migration. In this paper three factors are identified which may counterbalance the expected negative effect of increasing home ownership on migration. First, the composition of the population of homeowners has changed towards younger, more mobile households. Second, home ownership has become more common, possibly leading to greater dynamics within the owner-occupied segment of the housing market. And third, macro factors such as economic growth may have led to more migration. Using the Housing Demand Surveys and logistic regression analysis, we investigated to what extent the effect of home ownership on migration changed in the Netherlands during the 1980s and 1990s. We find - contrary to what we expected - that during the research period the negative effect of home ownership on migration seems to have strengthened somewhat. Within the research period, however, this negative effect was compensated by a general rise in migration for both owning and renting households, possibly attributable to macro factors affecting migration, such as economic growth and changes in the housing market. Copyright (c) 2006 by the Royal Dutch Geographical Society KNAG.
Maternal Black Race and Persistent Wheezing Illness in Former Extremely Low Gestational Age Newborns: Secondary Analysis of a Randomized Trial.
ObjectiveTo evaluate the relationship between maternal self-reported race/ethnicity and persistent wheezing illness in former high-risk, extremely low gestational age newborns, and to quantify the contribution of socioeconomic, environmental, and biological factors on this relationship.Study designWe assessed persistent wheezing illness determined at 18-24 months corrected (for prematurity) age in survivors of a randomized trial. Parents/caregivers were surveyed for wheeze and inhaled asthma medication use quarterly to 12 months, and at 18 and 24 months. We used multivariable analysis to evaluate the relationship of maternal race to persistent wheezing illness, and identified mediators for this relationship via formal mediation analysis.ResultsOf 420 infants (25.2 ± 1.2 weeks of gestation and 714 ± 166 g at birth, 57% male, 34% maternal black race), 189 (45%) had persistent wheezing illness. After adjustment for gestational age, birth weight, and sex, infants of black mothers had increased odds of persistent wheeze compared with infants of nonblack mothers (OR = 2.9, 95% CI 1.9, 4.5). Only bronchopulmonary dysplasia, breast milk diet, and public insurance status were identified as mediators. In this model, the direct effect of race accounted for 69% of the relationship between maternal race and persistent wheeze, whereas breast milk diet, public insurance status, and bronchopulmonary dysplasia accounted for 8%, 12%, and 10%, respectively.ConclusionsAmong former high-risk extremely low gestational age newborns, infants of black mothers have increased odds of developing persistent wheeze. A substantial proportion of this effect is directly accounted for by race, which may reflect unmeasured environmental influences, and acquired and innate biological differences.Trial registrationClinicalTrials.gov: NCT01022580
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Host factors are associated with vaginal microbiome structure in pregnancy in the ECHO Cohort Consortium
Using pooled vaginal microbiota data from pregnancy cohorts (N = 683 participants) in the Environmental influences on Child Health Outcomes (ECHO) Program, we analyzed 16S rRNA gene amplicon sequences to identify clinical and demographic host factors that associate with vaginal microbiota structure in pregnancy both within and across diverse cohorts. Using PERMANOVA models, we assessed factors associated with vaginal community structure in pregnancy, examined whether host factors were conserved across populations, and tested the independent and combined effects of host factors on vaginal community state types (CSTs) using multinomial logistic regression models. Demographic and social factors explained a larger amount of variation in the vaginal microbiome in pregnancy than clinical factors. After adjustment, lower education, rather than self-identified race, remained a robust predictor of L. iners dominant (CST III) and diverse (CST IV) (OR = 8.44, 95% CI = 4.06–17.6 and OR = 4.18, 95% CI = 1.88–9.26, respectively). In random forest models, we identified specific taxonomic features of host factors, particularly urogenital pathogens associated with pregnancy complications (Aerococcus christensenii and Gardnerella spp.) among other facultative anaerobes and key markers of community instability (L. iners). Sociodemographic factors were robustly associated with vaginal microbiota structure in pregnancy and should be considered as sources of variation in human microbiome studies