Hazel M Inskip

University of Southampton, Southampton, England, United Kingdom

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Publications (185)1140.2 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The FTO gene harbors variation with the strongest effect on adiposity and obesity risk. Previous data support a role for FTO variation in influencing food intake. We conducted a combined analysis of 16,094 boys and girls aged 1-18 years from 14 studies to examine: 1) the association between the FTO rs9939609 variant (or a proxy) and total energy and macronutrient intake; and 2) the interaction between the FTO variant and dietary intake on BMI. We found that the BMI-increasing allele (minor allele) of FTO variant was associated with increased total energy intake (effect per allele=14.3[5.9, 22.7] kcal/day, P=6.5×10(-4)) but not with protein, carbohydrate or fat intake. We also found that protein intake modified the association between the FTO variant and BMI (interactive effect per allele=0.08[0.03, 0.12]SDs, P for interaction=7.2×10(-4)): the association between FTO genotype and BMI was much stronger in individuals with high protein intake (effect per allele=0.10[0.07, 0.13]SDs, P=8.2×10(-10)) than in those with low intake (effect per allele=0.04[0.01, 0.07]SDs, P=0.02). Our results suggest that the FTO variant that confers a predisposition to higher BMI is associated with higher total energy intake and that lower dietary protein intake attenuates the association between FTO genotype and adiposity in children and adolescents. © 2015 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered.
    Diabetes 02/2015; DOI:10.2337/db14-1629
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    ABSTRACT: Rationale: Higher pulse wave velocity (PWV) reflects increased arterial stiffness and is an established cardiovascular risk marker associated with lower long-chain n-3 polyunsaturated fatty acid intake in adults. Experimentally, maternal fatty acid intake in pregnancy has lasting effects on offspring arterial stiffness. Objective: To examine the association between maternal consumption of oily fish, a source of long-chain n-3 polyunsaturated fatty acids, in pregnancy and child's aortic stiffness age 9 years. Methods and Results: In a mother-offspring study (Southampton Women's Survey) the child's descending aorta PWV was measured at age 9 years using velocity-encoded phase contrast magnetic resonance imaging and related to maternal oily fish consumption assessed prospectively during pregnancy. Higher oily fish consumption in late pregnancy was associated with lower childhood aortic PWV (sex-adjusted β=-0.084 m/s /portion/week, [95% CI -0.137 to -0.031], p=0.002, n=226). Mother's educational attainment was independently associated with child's PWV. PWV was not associated with the child's current oily fish consumption. Conclusions: Level of maternal oily fish consumption in pregnancy may influence child's large artery development, with potential long-term consequences for later cardiovascular risk.
    Circulation Research 02/2015; DOI:10.1161/CIRCRESAHA.116.305158
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    ABSTRACT: Studies in childhood suggest that both body composition and early postnatal growth are associated with bone mineral density (BMD). However, little is known of the relationships between longitudinal changes in fat (FM) and lean mass (LM), and bone development in pre-pubertal children. We therefore investigated these associations in a population-based mother-offspring cohort, the Southampton Women's Survey. Total FM and LM were assessed at birth and 6-7 years of age by Dual-Energy X-ray Absorptiometry (DXA). At 6-7y, total cross-sectional area (CSA) and trabecular volumetric BMD (vBMD) at the 4% site (metaphysis) of the tibia was assessed using peripheral quantitative computed tomography [pQCT (Stratec XCT-2000)]. Total CSA, cortical CSA, cortical vBMD and strength-strain index (SSI) were measured at the 38% site (diaphysis). FM, LM and bone parameters were adjusted for age and sex and standardised to create within-cohort z-scores. Change in LM (ΔLM) or FM (ΔFM) was represented by change in z-score from birth to 7y and conditioned on the birth measurement. Linear regression was used to explore the associations between ΔLM or ΔFM and standardised pQCT outcomes, before and after mutual adjustment and for linear growth. The β-coefficient represents SD change in outcome per unit SD change in predictor. DXA at birth, in addition to both DXA and pQCT scans at 6-7y, were available for 200 children (48.5% male). ΔLM adjusted for ΔFM was positively associated with tibial total CSA at both the 4% (β=0.57SD/SD, p<0.001) and 38% sites (β=0.53SD/SD, p<0.001), cortical CSA (β=0.48SD/SD, p<0.001) and trabecular vBMD (β=0.30SD/SD, p<0.001), but not with cortical vBMD. These relationships persisted after adjustment for linear growth. In contrast, ΔFM adjusted for ΔLM was only associated with 38% total and cortical CSA, which became non-significant after adjustment for linear growth. In this study, gain in childhood LM was positively associated with bone size and trabecular vBMD at 6-7 years of age. In contrast, no relationships between change in FM and bone were observed, suggesting that muscle growth, rather than accrual of fat mass, may be a more important determinant of childhood bone development. Copyright © 2015. Published by Elsevier Inc.
    Bone 02/2015; 75. DOI:10.1016/j.bone.2015.02.015
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    ABSTRACT: Early life may be a "critical period" when appetite and regulation of energy balance are programmed, with lifelong consequences for obesity risk. Insight into the potential impact of modifying early-life risk factors on later obesity can be gained by evaluating their combined effects. The objective was to examine the relation between the number of early-life risk factors and obesity outcomes among children in a prospective birth cohort (Southampton Women's Survey). Five risk factors were defined: maternal obesity [prepregnant body mass index (BMI; in kg/m(2)) >30], excess gestational weight gain (Institute of Medicine, 2009), smoking during pregnancy, low maternal vitamin D status (<64 nmol/L), and short duration of breastfeeding (none or <1 mo). Obesity outcomes examined when the children were aged 4 and 6 y were BMI, dual-energy X-ray absorptiometry-assessed fat mass, overweight, or obesity (International Obesity Task Force). Data were available for 991 mother-child pairs, with children born between 1998 and 2003. Of the children, 148 (15%) had no early-life risk factors, 330 (33%) had 1, 296 (30%) had 2, 160 (16%) had 3, and 57 (6%) had 4 or 5. At both 4 and 6 y, there were positive graded associations between number of early-life risk factors and each obesity outcome (all P < 0.001). After taking account of confounders, the relative risk of being overweight or obese for children who had 4 or 5 risk factors was 3.99 (95% CI: 1.83, 8.67) at 4 y and 4.65 (95% CI: 2.29, 9.43) at 6 y compared with children who had none (both P < 0.001). Having a greater number of early-life risk factors was associated with large differences in adiposity and risk of overweight and obesity in later childhood. These findings suggest that early intervention to change these modifiable risk factors could make a significant contribution to the prevention of childhood obesity.
    American Journal of Clinical Nutrition 02/2015; 101(2):368-75. DOI:10.3945/ajcn.114.094268
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    ABSTRACT: Evidence on the effect of maternal complications in pregnancy on wheezing in offspring is still insufficient. A pooled analysis was performed on individual participant data from fourteen European birth cohorts to assess the relationship between several maternal pregnancy complications and wheezing symptoms in the offspring. Exposures of interest included hypertension and preeclampsia, diabetes, as well as pre-pregnancy overweight (body mass index between 25 and 29.9) and obesity (body mass index ≥30) compared with normal weight (body mass index between 18.5 and 24.9). Outcomes included both ever and recurrent wheezing from birth up to 12-24 months of age. Cohort-specific crude and adjusted risk ratios (RR) were calculated using log-binomial regression models and then pooled using a random effects model. The study included 85 509 subjects. Cohort-specific prevalence of ever wheezing varied from 20.0% to 47.3%, and of recurrent wheezing from 3.0% to 14.3%. Adjusted pooled RR for ever and recurrent wheezing were: 1.02 (95% CI: 0.98-1.06) and 1.20 (95% CI: 0.98-1.47) for hypertensive disorders; 1.09 (95% CI: 1.01-1.18) and 1.23 (95% CI: 1.07-1.43) for preeclampsia; 1.04 (95% CI: 0.97-1.13) and 1.24 (95% CI: 0.86-1.79) for diabetes; 1.08 (95% CI: 1.05-1.11) and 1.19 (95% CI: 1.12-1.26) for overweight; 1.12 (95% CI: 1.08-1.17) and 1.16 (95% CI: 0.97-1.39) for obesity. No heterogeneity was found in RR estimates among the cohorts, except for diabetes and recurrent wheezing (P = 0.027). Preeclampsia, maternal pre-pregnancy overweight and obesity are associated with an increase risk of wheezing in the offspring. © The Author 2015; all rights reserved. Published by Oxford University Press on behalf of the International Epidemiological Association.
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    ABSTRACT: Epidemiological studies have shown that weaker grip strength in later life is associated with disability, morbidity, and mortality. Grip strength is a key component of the sarcopenia and frailty phenotypes and yet it is unclear how individual measurements should be interpreted. Our objective was to produce cross-sectional centile values for grip strength across the life course. A secondary objective was to examine the impact of different aspects of measurement protocol. We combined 60,803 observations from 49,964 participants (26,687 female) of 12 general population studies in Great Britain. We produced centile curves for ages 4 to 90 and investigated the prevalence of weak grip, defined as strength at least 2.5 SDs below the gender-specific peak mean. We carried out a series of sensitivity analyses to assess the impact of dynamometer type and measurement position (seated or standing). Our results suggested three overall periods: an increase to peak in early adult life, maintenance through to midlife, and decline from midlife onwards. Males were on average stronger than females from adolescence onwards: males' peak median grip was 51 kg between ages 29 and 39, compared to 31 kg in females between ages 26 and 42. Weak grip strength, defined as strength at least 2.5 SDs below the gender-specific peak mean, increased sharply with age, reaching a prevalence of 23% in males and 27% in females by age 80. Sensitivity analyses suggested our findings were robust to differences in dynamometer type and measurement position. This is the first study to provide normative data for grip strength across the life course. These centile values have the potential to inform the clinical assessment of grip strength which is recognised as an important part of the identification of people with sarcopenia and frailty.
    PLoS ONE 12/2014; 9(12):e113637. DOI:10.1371/journal.pone.0113637
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    ABSTRACT: To test the hypothesis that maternal psychological profiles relate to children's quality of diet. Cross-sectional study. Mothers provided information on their health-related psychological factors and aspects of their child's mealtime environment. Children's diet quality was assessed using an FFQ from which weekly intakes of foods and a diet Z-score were calculated. A high score described children with a better quality diet. Cluster analysis was performed to assess grouping of mothers based on psychological factors. Mealtime characteristics, describing how often children ate while sitting at a table or in front of the television, their frequency of takeaway food consumption, maternal covert control and food security, and children's quality of diet were examined, according to mothers' cluster membership. Mother-child pairs (n 324) in the Southampton Initiative for Health. Children were aged 2-5 years. Hampshire, UK. Two main clusters were identified. Mothers in cluster 1 had significantly higher scores for all psychological factors than mothers in cluster 2 (all P<0·001). Clusters were termed 'more resilient' and 'less resilient', respectively. Children of mothers in the less resilient cluster ate meals sitting at a table less often (P=0·03) and watched more television (P=0·01). These children had significantly poorer-quality diets (β=-0·61, 95 % CI -0·82, -0·40, P≤0·001). This association was attenuated, but remained significant after controlling for confounding factors that included maternal education and home/mealtime characteristics (P=0·006). The study suggests that mothers should be offered psychological support as part of interventions to improve children's quality of diet.
    Public Health Nutrition 11/2014; DOI:10.1017/S136898001400250X
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    ABSTRACT: Patterns of body size and body composition associated with genetic obesity susceptibility inform the mechanisms that increase obesity risk.
    JAMA Pediatrics 10/2014; 168(12). DOI:10.1001/jamapediatrics.2014.1619
  • Placenta 09/2014; 35(9):A48. DOI:10.1016/j.placenta.2014.06.156
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    ABSTRACT: To assess whether changes in measures of fat distribution and body size during early life are associated with blood pressure at 36 months of age.
    BMJ Open 07/2014; 4(7):e005412. DOI:10.1136/bmjopen-2014-005412
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    ABSTRACT: The UK government's response to the obesity epidemic calls for action in communities to improve people's health behaviour. This study evaluated the effects of a community intervention on dietary quality and levels of physical activity of women from disadvantaged backgrounds.
    BMJ Open 07/2014; 4(7):e005290. DOI:10.1136/bmjopen-2014-005290
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    ABSTRACT: Maternal hyperglycemia in pregnancy is associated with greater adiposity in offspring. The glycemic index (GI) and glycemic load (GL) describe the glycemic response to carbohydrate ingestion. However, the influence of maternal dietary GI and GL in pregnancy on childhood adiposity is unknown.OBJECTIVE: We examined relations of maternal dietary GI and GL in early and late pregnancy with offspring body composition.DESIGN: A total of 906 mother-child pairs from the prospective cohort the Southampton Women's Survey were included. Children underwent dual-energy X-ray absorptiometry measurements of body composition at birth and 4 and 6 y of age. Log-transformed fat mass and lean mass were standardized with a mean (±SD) of 0 ± 1. Maternal dietary GI and GL were assessed at 11 and 34 wk of gestation by using an administered food-frequency questionnaire.RESULTS: After controlling for potential confounders, both maternal dietary GI and GL in early pregnancy were positively associated with fat mass at 4 and 6 y of age [fat mass SDs per 10-unit GI increase: β = 0.43 (95% CI: 0.06, 0.80), P = 0.02 at 4 y of age; β = 0.40 (95% CI: 0.10, 0.70), P = 0.01 at 6 y of age; fat mass SDs per 50-unit GL increase: β = 0.43 (95% CI: 0.19, 0.67), P < 0.001 at 4 y of age, β = 0.27 (95% CI: 0.07, 0.47), P = 0.007 at 6 y of age]. In contrast, there were no associations between maternal dietary GI or GL in late pregnancy and offspring fat mass at these ages. Maternal dietary GI and GL were not associated with fat mass at birth or offspring lean mass at any of the ages studied.CONCLUSION: Higher maternal dietary GI and GL in early pregnancy are associated with greater adiposity in childhood.
    American Journal of Clinical Nutrition 06/2014; 100(2). DOI:10.3945/ajcn.114.084905
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    ABSTRACT: The consumer nutrition environment has been conceptualised as in-store environmental factors that influence food shopping habits. More healthful in-store environments could be characterised as those which promote healthful food choices such as selling good quality healthy foods or placing them in prominent locations to prompt purchasing. Research measuring the full-range of in-store environmental factors concurrently is limited.Purpose: To develop a summary score of 'healthfulness' composed of nine in-store factors that influence food shopping behaviour, and to assess this score by store type and neighbourhood deprivation.
    International Journal of Behavioral Nutrition and Physical Activity 05/2014; 11(1):69. DOI:10.1186/1479-5868-11-69
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    ABSTRACT: Chronic cardiorespiratory disease is associated with low birthweight suggesting the importance of the developmental environment. Prenatal factors affecting fetal growth are believed important, but the underlying mechanisms are unknown. The influence of developmental programming on bronchial hyperreactivity is investigated in an animal model and evidence for comparable associations is sought in humans. Pregnant Wistar rats were fed either control or protein-restricted diets throughout pregnancy. Bronchoconstrictor responses were recorded from offspring bronchial segments. Morphometric analysis of paraffin-embedded lung sections was conducted. In a human mother-child cohort ultrasound measurements of fetal growth were related to bronchial hyperreactivity, measured at age six years using methacholine. Protein-restricted rats' offspring demonstrated greater bronchoconstriction than controls. Airway structure was not altered. Children with lesser abdominal circumference growth during 11-19 weeks' gestation had greater bronchial hyperreactivity than those with more rapid abdominal growth. Imbalanced maternal nutrition during pregnancy results in offspring bronchial hyperreactivity. Prenatal environmental influences might play a comparable role in humans.
    Scientific Reports 04/2014; 4:4705. DOI:10.1038/srep04705
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    ABSTRACT: To determine adherence to nutritional guidelines by pregnant women in New Zealand and maternal characteristics associated with adherence. A cohort of the pregnant women enrolled into New Zealand's new birth cohort study, Growing Up in New Zealand. Women residing within a North Island region of New Zealand, where one-third of the national population lives. Pregnant women (n 5664) were interviewed during 2009-2010. An FFQ was administered during the face-to-face interview. The recommended daily number of servings of vegetables and fruit (≥6) were met by 25 % of the women; of breads and cereals (≥6) by 26 %; of milk and milk products (≥3) by 58 %; and of lean meat, meat alternatives and eggs (≥2) by 21 %. One in four women did not meet the recommendations for any food group. Only 3 % met all four food group recommendations. Although adherence to recommendation for the vegetables/fruit group did not vary by ethnicity (P=0·38), it did vary for the breads/cereals, milk/milk products and meat/eggs groups (all P<0·001). Adherence to recommendations for the vegetables/fruit group was higher among older women (P=0·001); for the breads/cereals group was higher for women with previous children (P<0·001) and from lower-income households (P<0·001); and for the meat/eggs group was higher for women with previous children (P=0·003) and from lower-income households (P=0·004). Most pregnant women in New Zealand do not adhere to nutritional guidelines in pregnancy, with only 3 % meeting the recommendations for all four food groups. Adherence varies more so with ethnicity than with other sociodemographic characteristics.
    Public Health Nutrition 04/2014; 17(9):1-11. DOI:10.1017/S1368980014000482
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    ABSTRACT: A total of 148 health and social care practitioners were trained in skills to support behaviour change: creating opportunities to discuss health behaviours, using open discovery questions, listening, reflecting and goal-setting. At three time points post-training, use of the skills was evaluated and compared with use of skills by untrained practitioners. Trained practitioners demonstrated significantly greater use of these client-centred skills to support behaviour change compared to their untrained peers up to 1 year post-training. Because it uses existing services to deliver support for behaviour change, this training intervention has the potential to improve public health at relatively low cost.
    Journal of Health Psychology 04/2014; DOI:10.1177/1359105314523304
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    ABSTRACT: To investigate the association between objectively measured maternal and preschool-aged children's physical activity, determine how this association differs by demographic and temporal factors, and identify factors associated with maternal activity levels. In the UK Southampton Women's Survey, physical activity levels of 554 4-year-olds and their mothers were measured concurrently by using accelerometry for ≤7 days. Two-level mixed-effects linear regression was used to model the association between maternal and children's minutes spent sedentary, in light (LPA) and moderate-to-vigorous physical activity (MVPA). Linear regression was used to investigate correlates of maternal activity. Mother-child daily activity levels were positively associated at all activity intensities (sedentary, LPA, and MVPA; all P < .001). The association for sedentary time was stronger for normal-weight children (versus those who were overweight/obese), and those attending preschool part-time (versus full-time). The mother-child association for LPA differed by maternal education and was stronger at the weekend (versus weekdays). The opposite was true for MVPA. Sedentary time and MVPA were most strongly associated in mornings, with LPA most strongly associated in the evenings. Maternal BMI, age leaving school, number and age of children at home, and working hours were independently associated with maternal daily sedentary time and LPA. Physical activity levels in mothers and their 4-year-old children are directly associated, with associations at different activity intensities influenced by temporal and demographic factors. Influences on maternal physical activity levels also differ by activity intensity. Providing targeted interventions for mothers of young children may increase both groups' activity.
    PEDIATRICS 03/2014; 133(4). DOI:10.1542/peds.2013-3153
  • Jill Pell, Janet Valentine, Hazel Inskip
    The Lancet 03/2014; 383(9922):1015-6. DOI:10.1016/S0140-6736(14)60412-8
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    ABSTRACT: 10.1183/09031936.00131613
    European Respiratory Journal 03/2014; 43(3-3):919-921. DOI:10.1183/09031936.00131613
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    ABSTRACT: Maternal vitamin D deficiency has been associated with reduced offspring bone mineral accrual. Retinoid-X Receptor-alpha (RXRA) is an essential cofactor in the action of 1,25(OH)2 -vitamin D, and RXRA methylation in umbilical cord DNA has been associated with later offspring adiposity. We tested the hypothesis that RXRA methylation in umbilical cord DNA collected at birth is associated with offspring skeletal development, assessed by dual-energy X-ray absorptiometry, in a population-based mother-offspring cohort (Southampton Women's Survey). Relationships between maternal plasma 25(OH)-vitamin D concentrations and cord RXRA methylation were also investigated. In 230 children aged 4 years, higher % methylation at 4 out of 6 RXRA CpG sites measured was correlated with lower offspring BMC corrected for body size (β = - 2.1 to -3.4g/SD, p = 0.002 to 0.047). In a second independent cohort (n = 64), similar negative associations at two of these CpG sites, but positive associations at the two remaining sites, were observed; however none of the relationships in this replication cohort achieved statistical significance. Maternal free 25(OH)-vitamin D index was negatively associated with methylation at one of these RXRA CpG sites (β = - 3.3 SD/unit, p = 0.03). Thus, perinatal epigenetic marking at the RXRA promoter region in umbilical cord was inversely associated with offspring size-corrected bone mineral content in childhood. The potential mechanistic and functional significance of this finding remains a subject for further investigation.
    Journal of bone and mineral research: the official journal of the American Society for Bone and Mineral Research 03/2014; 29(3). DOI:10.1002/jbmr.2056

Publication Stats

4k Citations
1,140.20 Total Impact Points

Institutions

  • 2000–2015
    • University of Southampton
      • • Faculty of Medicine
      • • MRC Lifecourse Epidemiology Unit
      Southampton, England, United Kingdom
  • 2013
    • University of Bristol
      Bristol, England, United Kingdom
  • 2010
    • The Bracton Centre, Oxleas NHS Trust
      Дартфорде, England, United Kingdom
  • 2005
    • University of Bergen
      Bergen, Hordaland, Norway
  • 1998
    • Poole Hospital NHS Foundation Trust
      Poole, England, United Kingdom