Publications by authors named "Linda M O Keeffe"

Background: Sensory processing involves the nervous system receiving, modulating, and responding to sensory stimuli. Clinical samples have elevated rates of sensory processing difficulties, less is known about sensory processing at population-level. We aimed to investigate patterns of sensory processing in infancy and their association with perinatal factors.

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Background: Poverty is associated with poor outcomes, yet exposure to distinct poverty trajectories in early childhood is not well understood.

Objective: To understand the prevalence of different trajectories of household poverty and their association with mid-childhood and mother indicators of physical health and psychopathology in Ireland.

Methods: We used a nationally representative, prospective cohort (Growing Up in Ireland-Infant Cohort).

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Specific pregnancy complications, socioeconomic position and sex have all been independently associated with child mental health outcomes, but their combined effects remain unclear. We examined whether total number of complications experienced in the pregnancy associated with mental health at 5 and 9-years, and whether this varied by sex or adverse social circumstances. Pregnancy complications were self-reported at 9-months post-natally from a list of 16 complications.

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Background: Cardiovascular disease (CVD) is the leading cause of mortality and disability globally. We examined healthcare service utilization and costs attributable to CVD in Ireland in the period before the introduction of a major healthcare reform in 2016.

Methods: Secondary analysis of data from 8113 participants of the first wave of The Irish Longitudinal Study on Ageing.

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Purpose: The aim of this study is to examine the association between household energy poverty (EP) and trajectories of emotional and behavioural difficulties during childhood.

Methods: The Growing up in Ireland study is two nationally representative prospective cohorts of children. The Infant Cohort (n = 11,134) were recruited at age 9 months (9 m) and followed up at 3, 5, 7 and 9 years (y).

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Background: Socioeconomic inequalities in cardiovascular disease risk begin early in life and are more pronounced in females than males later in life. Causal atherogenic traits explaining this are not well understood. We explored sex-specific associations between childhood socioeconomic position (SEP) and molecular measures of systemic metabolism across early life.

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Article Synopsis
  • Mitochondrial DNA haplogroups (H, U, J, T, K, V, W, I, and X) were studied for their relationship with cardiometabolic risk factors in a cohort from birth to age 18, focusing on sex differences.
  • Data from 7,954 participants revealed that most haplogroups showed no significant association with cardiometabolic factors, except for slight variations observed in haplogroups V and X in females and haplogroup I in males during specific age points.
  • Overall, the findings suggest minimal evidence supporting a link between mitochondrial DNA haplogroups and cardiometabolic risk factors, indicating that other factors may play a more significant role in risk development.
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Article Synopsis
  • The study aimed to model the growth patterns of children from pregnancy through the first five years using complex statistical models called linear spline multilevel models.
  • Conducted in a maternity hospital in Dublin, it involved 720-759 mother-child pairs from the ROLO study, which originally focused on the effects of a low glycaemic index diet in preventing large birth weights.
  • The findings revealed that growth rates were highest during pregnancy and immediately after birth, with a gradual slowdown in growth as children matured, demonstrating the effectiveness of the chosen modeling approach for tracking growth over time.
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Background/objectives: Different genetic variants are associated with larger body size in childhood vs adulthood. Whether and when these variants predominantly influence adiposity are unknown. We examined how genetic variants influence total body fat and total lean mass trajectories.

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Background: The changes which typically occur in molecular causal risk factors and predictive biomarkers for cardiometabolic diseases across early life are not well characterised.

Methods: We quantified sex-specific trajectories of 148 metabolic trait concentrations including various lipoprotein subclasses from age 7 years to 25 years. Data were from 7065 to 7626 offspring (11 702 to14 797 repeated measures) of the Avon Longitudinal Study of Parents and Children birth cohort study.

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Article Synopsis
  • The study examines how the intake of dietary micronutrients like iron, folate, and vitamin B12 affects maternal hemoglobin levels and fetal growth during pregnancy.
  • It involved 759 mother-child pairs, using food diaries and blood samples to analyze nutrient intake and growth metrics at various stages of pregnancy.
  • Results showed that while dietary intakes of iron and folate were lacking, there was no clear link between these nutrients and fetal growth, but lower maternal hemoglobin at 28 weeks was associated with increased fetal and placental growth rates.
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Objective: To examine the association between maternal metabolic parameters in pregnancy and growth trajectories up to 5 years of age.

Methods: Data from mother-child pairs who participated in the ROLO study, a randomized trial examining the impact of a low glycaemic index diet on the recurrence of macrosomia, were analysed. Fetal and child growth trajectories were developed from longitudinal measurements from 20 weeks gestation up to 5 years of age.

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Background: The direct effects of general adiposity (body mass index (BMI)) and central adiposity (waist-to-hip-ratio (WHR)) on circulating lipoproteins, lipids, and metabolites are unknown.

Methods: We used new metabolic data from UK Biobank (=109,532, a five-fold higher N over previous studies). EDTA-plasma was used to quantify 249 traits with nuclear-magnetic-resonance spectroscopy including subclass-specific lipoprotein concentrations and lipid content, plus pre-glycemic and inflammatory metabolites.

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Background: Individual differences in children eating behaviours have been linked with childhood overweight and obesity. The determinants of childhood eating behaviours are influenced by a complex combination of hereditary and ecological factors. This study examines if key ecological predictors of childhood overweight; maternal socio-economic status (SES), children's screen time, and childcare arrangements, are associated with eating behaviours in children aged 5-years-old.

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Background: Sex differences in systolic blood pressure (SBP) emerge during adolescence but the role of puberty is not well understood. We examined sex-specific changes in SBP preceding and following puberty and examined the impact of puberty timing on SBP trajectories in females and males.

Methods: Trajectories of SBP before and after puberty and by timing of puberty in females and males in a contemporary birth cohort study were analyzed.

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Background Breastfeeding has been robustly linked to reduced maternal risk of breast cancer, ovarian cancer, and type 2 diabetes. We herein systematically reviewed the published evidence on the association of breastfeeding with maternal risk of cardiovascular disease (CVD) outcomes. Methods and Results Our systematic search of PubMed and Web of Science of articles published up to April 16, 2021, identified 8 relevant prospective studies involving 1 192 700 parous women (weighted mean age: 51.

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Background: Sex differences in cardiometabolic disease risk are commonly observed across the life course but are poorly understood and may be due to different associations of adiposity with cardiometabolic risk in females and males. We examined whether adiposity is differently associated with cardiometabolic trait levels in females and males at 3 different life stages.

Methods And Findings: Data were from 2 generations (offspring, Generation 1 [G1] born in 1991/1992 and their parents, Generation 0 [G0]) of a United Kingdom population-based birth cohort study, the Avon Longitudinal Study of Parents and Children (ALSPAC).

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Article Synopsis
  • This study investigates the long-term effects of maternal prenatal anxiety and depression on the cardiometabolic health of their children from birth to 18 years.
  • Using data from the Avon Longitudinal Study of Parents and Children, researchers analyzed 526-8606 mother-offspring pairs in Bristol, UK.
  • While some associations were found (like depression linked to higher blood pressure), overall results indicated no strong connections between maternal mental health and various cardiometabolic risk factors in offspring.
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Background: The potential benefits of gaining body muscle for cardiovascular disease (CVD) susceptibility, and how these compare with the potential harms of gaining body fat, are unknown. We compared associations of early life changes in body lean mass and handgrip strength versus body fat mass with atherogenic traits measured in young adulthood.

Methods And Findings: Data were from 3,227 offspring of the Avon Longitudinal Study of Parents and Children (39% male; recruited in 1991-1992).

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Article Synopsis
  • Inadequate sleep and poor eating habits increase the risk of childhood obesity, but the link between sleep and eating behaviors, and how this varies by sex, is not fully understood.
  • A study on 5-year-old children found that longer sleep duration is associated with lower BMI and body measurements, with girls showing stronger negative associations than boys.
  • Additionally, while some eating behaviors related to food enjoyment were positively associated with body measurements in girls, sleep duration influenced emotional eating and food fussiness differently in boys and girls.
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Background: Whether earlier onset of puberty is associated with higher cardiovascular risk in early adulthood is not well understood. Our objective was to examine the association between puberty timing and markers of cardiovascular structure and function at age 25 years.

Methods: We conducted a prospective birth cohort study using data from the Avon Longitudinal Study of Parents and Children (ALSPAC).

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Article Synopsis
  • Males have higher rates of coronary heart disease (CHD) compared to females, but the underlying metabolic factors influencing this difference are not well understood.
  • The study analyzed data from the Avon Longitudinal Study across different life stages, examining systemic metabolites in both genders from childhood to middle adulthood using advanced metabolic analysis techniques.
  • Findings revealed that males had lower VLDL lipids as children, but significantly higher levels as they aged, indicating increasing sex differences in metabolic traits linked to CHD risk, while other lipoprotein metrics generally showed lower levels in males across the board.
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Objective: Observational studies have demonstrated that type 2 diabetes is a stronger risk factor for coronary heart disease (CHD) in women compared with men. However, it is not clear whether this reflects a sex differential in the causal effect of diabetes on CHD risk or results from sex-specific residual confounding.

Research Design And Methods: Using 270 single nucleotide polymorphisms (SNPs) for type 2 diabetes identified in a type 2 diabetes genome-wide association study, we performed a sex-stratified Mendelian randomization (MR) study of type 2 diabetes and CHD using individual participant data in UK Biobank (251,420 women and 212,049 men).

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Study Question: Is earlier puberty more likely a result of adiposity gain in childhood than a cause of adiposity gain in adulthood?

Summary Answer: Pre-pubertal fat mass is associated with earlier puberty timing but puberty timing is not associated with post-pubertal fat mass change.

What Is Known Already: Age at puberty onset has decreased substantially in the last several decades. Whether reducing childhood adiposity prevents earlier puberty and if early puberty prevention itself also has additional independent benefits for prevention of adult adiposity is not well understood.

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Objectives: To examine the associations between preeclampsia and longitudinal child developmental and behavioural outcomes using data from a nationally representative study of children living in Ireland.

Methods: We used maternal-reported data from the Growing Up in Ireland longitudinal study of children. Data on preeclampsia and preeclampsia + small for gestational age (SGA) were collected when children were 9-months old.

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