Orla Doyle

Political interest, cognitive ability and personality: determinants of voter turnout in Britain

This paper uses longitudinal data from the National Cohort Development Study (NCDS) to investigate the determinants of voter turnout in the 1997 British General Election. It introduces measures of cognitive ability and personality into models of electoral participation and finds that firstly, their inclusion reduces the impact of education and secondly, that standard turnout models may be biased by the inclusion of the much used “interest in politics” measure. A bivariate probit model of turnout and interest then shows that individuals with high ability, an aggressive personality and a sense of civic duty are more likely to both turn out to vote and to have an interest in politics.

Factors associated with breastfeeding initiation: A comparison between France and French-speaking Canada

Background Breastfeeding is associated with multiple domains of health for both mothers and children. Nevertheless, breastfeeding initiation is low within certain developed countries. Furthermore, comparative studies of initiation rates using harmonised data across multiple regions is scarce. Objective The aim of the present study was to investigate and compare individual-level determinants of breastfeeding initiation using two French-speaking cohorts. Methods Participants included ~ 3,900 mothers enrolled in two cohort studies in Canada and France. Interviews, questionnaires, and medical records were utilised to collect information on maternal, family, and medical factors associated with breastfeeding initiation. Results Rates of breastfeeding initiation were similar across cohorts, slightly above 70%. Women in both Canada and France who had higher levels of maternal education, were born outside of their respective countries and who did not smoke during pregnancy were more likely to initiate breastfeeding with the cohort infant. Notably, cohort effects of maternal education at the university level were found, whereby having ‘some university’ was not statistically significant for mothers in France. Further, younger mothers in Canada, who delivered by caesarean section and who had previous children, had reduced odds of breastfeeding initiation. These results were not found for mothers in France. Conclusions and Implications for Practice While some similar determinants were observed, programming efforts to increase breastfeeding initiation should be tailored to the characteristics of specific geographical regions which may be heavily impacted by the social, cultural and political climate of the region, in addition to individual and family level factors.

Home based educational intervention to improve perinatal outcomes for a disadvantaged community: A randomised control trial

OBJECTIVES Pregnancy, labour, and delivery involve risk for mothers and infants. This study tested the effectiveness of a home-based programme to improve perinatal outcomes among socially disadvantaged women. The hypothesis was that the intervention group who received education and support during pregnancy would have better perinatal outcomes than the control group. STUDY DESIGN This is a randomised controlled trial. Pregnant women from a disadvantaged community in Dublin, Ireland were eligible for participation in Preparing for Life, a home visiting early intervention programme. 233 participants were recruited and assigned to an intervention (n=115) and control (n=118) group using an unconditional probability randomisation strategy. Maternity hospital records were available for 206 participants (nintervention=106; ncontrol=100). Consent to access records was not provided by 9 participants, records were missing for 17 participants and 1 record was excluded due to miscarriage. The intervention group were prescribed an average of ten prenatal home visits from a trained mentor. Mentors provided information on healthy prenatal behaviours and the birthing experience using tip sheets and social support. The control group received care as usual including the opportunity to attend standard antenatal classes. The outcomes included neonatal (Apgar scores, birth weight, gestational age and prematurity) and maternal (labour onset method and delivery method) outcomes. Statistical analyses were conducted using t -tests, tests of proportions, regression, logistic regression and permutation testing. RESULTS There were no differences on any of the neonatal outcomes or the majority of the maternal outcomes. Two secondary results were found such that there was an increase in the rate of spontaneous onset of labour in the intervention group compared to the control group (69.8% v 58.0%; OR 1.67, 95% CI=0.94, 2.97; p<0.05) and there was a reduction in caesarean section rates in the intervention group compared to the control group (15.1% v 25.0%; OR 0.53, 95% CI=0.27, 1.07; p<0.05). CONCLUSIONS This prenatal home visiting programme had no impact on neonatal outcomes, yet there was suggestive evidence that it prepared women for birth, and potentially led to increased spontaneous onset of labour and reduced caesarean section. Further studies are required to test these observation generating hypotheses. Trial registration ISRCTN04631728- http://www.controlled-trials.com/ISRCTN04631728/

Well-being in pregnancy: an examination of the effect of socioeconomic, dietary and lifestyle factors including impact of a low glycaemic index dietary intervention.

Background/Objective:Well-being has been linked to the quality of diet and lifestyle in adults; however, there is a paucity of data in pregnancy. The aim of this study was to examine the relationship between well-being and socioeconomic status, diet and lifestyle during pregnancy and to consider the effect of intervention with low glycaemic index (GI) diet on well-being.Subjects/Methods:This was a cohort analysis of 619 participants of the ROLO study (Randomised cOntrol trial of LOw GI diet versus no dietary intervention to prevent recurrence of fetal macrosomia). The following data were collected: educational attainment, dietary intakes (food frequency questionnaire), physical activity (self-reported) and well-being (WHO-5-Item Wellbeing Index—expressed as a percentage).Results:Well-being was positively associated with education and physical activity. Third-level education was associated with a 3.07-point higher well-being percentage score, and each day that an individual achieved >30 min walking per week was associated with a 1.10-point increase in percentage well-being score, Radj2 2.4% (F=7.260, P=0.001). The intervention low GI group had a significantly lower percentage well-being score than the usual diet group (56.3% vs 59.9%, P=0.015). No correlation was noted between well-being and GI status calculated from food diaries (P=0.469). Well-being was not associated with micronutrient intake.Conclusions:Well-being in pregnancy was independently and positively associated with education and physical activity and negatively associated with low GI dietary intervention. These findings have significance not only for women at risk of low mood but also for healthcare professionals when counselling women about the importance of healthy lifestyle in pregnancy.

Early intervention and child health: Evidence from a Dublin-based randomized controlled trial

This article investigates the impact of an early intervention program, which experimentally modifies the parenting and home environment of disadvantaged families, on child physical health in the first 3 years of life. We recruited and randomized 233 (115 intervention, 118 control) pregnant women from a socioeconomically disadvantaged community in Dublin, Ireland into an intervention or control group. The treatment includes regular home visits commencing antenatally and an additional parenting course commencing at 2 years. Maternal reports of child health are assessed at 6, 12, 18, 24, and 36 months. Treatment effects are estimated using permutation testing to account for small sample size, inverse probability weighting to account for differential attrition, and both the stepdown procedure and an indices approach to account for multiple hypothesis testing. Following adjustment for multiple testing and attrition, we observe a positive and statistically significant main treatment effect for wheezing/asthma. The intervention group are 15.5 percentage points (pp) less likely to require medical attention for wheezing/asthma compared to the control group. Subgroup analysis reveals more statistically significant adjusted treatment effects for boys than girls regarding fewer health problems (d=0.63), accidents (23.9pp), and chest infections (22.8-37.9pp). Our results suggest that a community-based home visiting program may have favorable impacts on early health conditions.

Breastfeeding, cognitive and noncognitive development in early childhood: A population study

Through the use of a quasi-experimental approach, this study captures the potential effects of breastfeeding on children’s cognitive and noncognitive development in early childhood. BACKGROUND AND OBJECTIVES: There is mixed evidence from correlational studies that breastfeeding impacts children’s development. Propensity score matching with large samples can be an effective tool to remove potential bias from observed confounders in correlational studies. The aim of this study was to investigate the impact of breastfeeding on children’s cognitive and noncognitive development at 3 and 5 years of age. METHODS: Participants included ∼8000 families from the Growing Up in Ireland longitudinal infant cohort, who were identified from the Child Benefit Register and randomly selected to participate. Parent and teacher reports and standardized assessments were used to collect information on children’s problem behaviors, expressive vocabulary, and cognitive abilities at age 3 and 5 years. Breastfeeding information was collected via maternal report. Propensity score matching was used to compare the average treatment effects on those who were breastfed. RESULTS: Before matching, breastfeeding was associated with better development on almost every outcome. After matching and adjustment for multiple testing, only 1 of the 13 outcomes remained statistically significant: children’s hyperactivity (difference score, –0.84; 95% confidence interval, –1.33 to –0.35) at age 3 years for children who were breastfed for at least 6 months. No statistically significant differences were observed postmatching on any outcome at age 5 years. CONCLUSIONS: Although 1 positive benefit of breastfeeding was found by using propensity score matching, the effect size was modest in practical terms. No support was found for statistically significant gains at age 5 years, suggesting that the earlier observed benefit from breastfeeding may not be maintained once children enter school.

The challenges of contamination in evaluations of childhood interventions

Contamination in social programmes occurs when the control group either actively or passively receive some or all of the intervention intended for the treatment group. While contamination is considered a potential threat to the internal validity of an evaluation, there is relatively little evidence on the magnitude and prevalence of contamination in social programmes and the extent to which it can bias the estimates of programme effectiveness. The aim of this article is to document the challenges of contamination in a number of childhood interventions currently being evaluated in Ireland using experimental and quasi-experimental methods. The article documents the experiences of addressing contamination at the professional staff level, the parent and child level and the dissemination level. It describes the methods employed to minimize contamination and the procedures used for measuring it. Finally, the consequences of contamination for both programme implementation and the research design are discussed.

Returns to basic skills in central and eastern Europe

This article uses semi-parametric econometric techniques to investigate the relationship between basic skills and earnings in three post-communist countries: the Czech Republic, Hungary and Slovenia, using the International Adult Literacy Survey dataset. It finds that including a measure of basic skills in a Mincer model reduces the returns to education. In addition, using a partially linear model, in which log earnings is linear in education but is an arbitrary function of basic skills, it finds that this relationship is not well described by the common assumption of linearity at the tails of the distribution.

Economics of childbirth

Increasing birth rates have raised questions for policy makers and hospital management about the economic costs of childbirth.

The distribution of wellbeing in Ireland

OBJECTIVES There is a substantial knowledge gap about the distribution of mental health in community populations. The European Social Survey is particularly useful as it contains information on over 40,000 individuals, including 2,286 Irish adults. The objective of this study is to conduct a large scale statistical analysis to examine the distribution and determinants of mental wellbeing in a large representative sample of the Irish population. METHOD Analysis of the European Social Survey using robust multiple linear and non-linear regression techniques. The data-set contains WHO-Five scores and subjective wellbeing for a sample of 2,286 Irish people interviewed in their homes in 2005. RESULTS Ireland has the second highest average WHO-Five score among the 22 countries in the European Social Survey. Multiple linear regression analysis across the distribution of WHO-Five reveals a wellbeing gradient largely related to education and social capital variables. A probit model examining the determinants of vulnerability to psychiatric morbidity reveals that a similar set of factors predict scores below the threshold point on the WHO-Five scale. CONCLUSIONS The results are consistent with marked differences in mental wellbeing across education levels and variables relating to social capital factors. Such indicators provide a useful index for policy-makers and researchers. However, much further work is needed to identify causal mechanisms generating observed differences in mental health across different socioeconomic groups.