The development of the gut microbiome and temperament during infancy and early childhood: A systematic review.

Temperament in early childhood is a good predictor of later personality, behavior, and risk of psychopathology. Variation in temperament can be explained by environmental and biological factors. One biological mechanism of interest is the gut microbiome (GM), which has been associated with mental and physical health. This review synthesized existing literature evaluating the relationship between GM composition and diversity, and temperament in early life. Web of Science, PsycInfo, PubMed, and Scopus were searched, and data were extracted according to PRISMA guidelines. In total, 1562 studies were identified, of which six remained following application of exclusion/inclusion criteria. The findings suggest that there is an association between higher alpha diversity and temperament: greater Surgency/Extraversion and High-Intensity Pleasure in males, and lower Effortful Control in females. Unique community structures (beta diversity) were found for Surgency/Extraversion in males and Fear in females. An emerging pattern of positive temperament traits being associated with GM communities biased toward short-chain fatty acid production from a metabolism based on dietary fiber and complex carbohydrates was observed and is worthy of further investigation. To gain deeper understanding of the relationship, future research should investigate further the functional aspects of the microbiome and the influence of diet.

Caregiver Influences on Eating Behaviors in Young Children: A Scientific Statement From the American Heart Association.

A substantial body of research suggests that efforts to prevent pediatric obesity may benefit from targeting not just what a child eats, but how they eat. Specifically, child obesity prevention should include a component that addresses reasons why children have differing abilities to start and stop eating in response to internal cues of hunger and satiety, a construct known as eating self-regulation. This review summarizes current knowledge regarding how caregivers can be an important influence on children's eating self-regulation during early childhood. First, we discuss the evidence supporting an association between caregiver feeding and child eating self-regulation. Second, we discuss what implications the current evidence has for actions caregivers may be able to take to support children's eating self-regulation. Finally, we consider the broader social, economic, and cultural context around the feeding environment relationship and how this intersects with the implementation of any actions. As far as we are aware, this is the first American Heart Association (AHA) scientific statement to focus on a psychobehavioral approach to reducing obesity risk in young children. It is anticipated that the timely information provided in this review can be used not only by caregivers within the immediate and extended family but also by a broad range of community-based care providers.

Using pictorial nudges of fruit and vegetables on tableware to increase children's fruit and vegetable consumption.

Children's fruit and vegetable consumption is lower than recommended. Increasing consumption is important for children's health. Nudges influence children's eating behaviour, but less is known about the influence of a pictorial nudge on tableware on children's fruit and vegetable consumption. Two studies examined this. Study 1 examined whether a pictorial fruit nudge (a grape image) on a plate influenced children's fruit (grape) consumption relative to a control condition (no image). In a between-subjects design, children (n = 63, Mean age = 8.9 years, SD = 1.41, 38 females, 25 males, 73% had a healthy-weight) were randomly assigned to one of two conditions (fruit nudge vs. control). Study 2 examined the influence of a large portion pictorial nudge (a large portion carrot image) vs. a small portion pictorial nudge (a small portion carrot image) vs. control (no nudge) on children's vegetable (carrot) consumption. In a between-subjects design, children (n = 59, Mean age = 8.57 years, SD = 2.13, 31 females, 28 males, 85% had a healthy-weight) were randomly assigned to a condition. In Study 1 children consumed significantly more fruit in the pictorial nudge condition than the control condition. In Study 2 children ate significantly more vegetables in the large portion pictorial nudge condition than the other two conditions. The small portion pictorial nudge did not affect children's vegetable consumption relative to control. The results indicate that pictorial nudges on tableware influence children's fruit and vegetable consumption, and the portion size of this type of nudge may be key to whether it influences children's eating behaviour.

Observing Maternal Restriction of Food with 3⁻5-Year-Old Children: Relationships with Temperament and Later Body Mass Index (BMI).

Overt parental restriction of food has previously been associated with child weight; however, most research has relied on self-reported feeding behaviour, or observations which give little opportunity to observe restriction of food. Using a novel lab-based observational technique to increase the opportunity to observe maternal feeding restriction, we explored the relationships between maternal restriction, child responses to restriction and child temperament with child body mass index (BMI) Z-scores over time. Sixty-two mother child dyads were recruited to the study when their children were aged 3⁻5 years and were followed up 2 years later (N = 39 dyads). Families were observed during a feeding interaction in the laboratory where cookies were offered with the main meal to increase the opportunity for maternal restriction of food. Feeding observations were coded and child temperament and BMI were measured. Controlling for current child BMI Z-scores, greater maternal verbal and physical restriction of food at 3⁻5 years was related to higher child BMI Z-scores at 5⁻7 years. More emotional children were less likely to experience restriction and less likely to accept attempts to restrict their food intake. Further research should consider children’s reactions to parental feeding behaviours in greater depth and explore how feeding practices interact with child temperament in the prediction of changes in child weight.

The relation between eating disorder symptoms and impairment.

Although a number of studies have looked at what factors might mediate the relationship between symptoms and quality of life (QoL) in a number of psychiatric disorders, little research has addressed this issue in eating disorders. In the current study, female undergraduates (N = 339) completed questionnaires assessing eating disorder symptoms, social support, coping, QoL, and psychosocial impairment. Perceived family support and levels of substance misuse as a way of coping were identified as mediators of the symptom-impairment relationship and, in addition, maladaptive coping also mediated the relationship with QoL. These results highlight the role of coping and social support in impairment resulting from eating disorder symptoms.

Perception of control during episodes of eating: relationships with quality of life and eating psychopathology.

OBJECTIVE: Experience of loss of control (LOC) during eating is an important indicator of pathology, although this concept has not received a great deal of research attention. The present study explores how quality of life (QoL) is related to LOC during eating. METHOD: Three hundred and thirty-nine female university students completed measures of eating pathology, general psychiatric symptomatology, and QoL. They were subsequently categorized according to the degree of LOC experienced during eating into one of five groups: no binge eating (NBE); objective overeating (OOE); objective binge eating (OBE); subjective binge eating (SBE); and a mixed OBE/SBE group (Mixed). RESULTS: Individuals who experienced LOC during eating reported significantly poorer QoL and more psychiatric symptoms. DISCUSSION: In a nonclinical female sample, LOC during eating appeared to be a more important marker of pathology and poorer self-reported QoL than the amount of food eaten.

Eating disorders and quality of life: a review of the literature.

Following recent scientific interest in the quality of life (QoL) of individuals with eating disorders (EDs), this paper aims to provide a summary of the relevant evidence. A literature review on QoL in EDs (EDQoL) was carried out and relevant articles are described in six main sections. Following an introduction to the area and a summary of the methods used in the review, assessment of QoL in EDs is discussed. The third section represents the body of the review and appraises EDQoL in more detail, discussing what idiosyncratic features of EDs might be important in affecting QoL. The review concludes with suggestions for further research in this evolving area and summarizes the main findings. An evidence base is constructed supporting the idea that those with EDs have impaired QoL compared to other psychiatric and physical health conditions. However, what determines impairments in QoL is yet to be delineated although ideas for such variables, such as the presence of bingeing and purging, are suggested. Development of ED-specific measures has aided greatly in the pursuit of clarity, although equivocal conclusions in this complex area necessitate further research.

Maternal and paternal controlling feeding practices: reliability and relationships with BMI.

OBJECTIVE: This study aimed to examine the interrelationships between mothers' and fathers' reports on the child-feeding questionnaire (CFQ), the BMI of parents and their children, and observations of parents' controlling feeding practices at mealtimes. METHODS AND PROCEDURES: Twenty-three mothers and twenty-three fathers of children aged between 18 and 67 months reported on their child-feeding practices, on their child's height and weight, and were observed during a normal family mealtime at home. RESULTS: No associations were found between mothers' reported and observed feeding practices. Fathers' reported pressure to eat and restriction were associated with more controlling observed mealtime feeding practices. Mothers and fathers did not significantly differ in their reported or observed child-feeding practices. Children's BMI was not related to maternal or paternal reported or observed feeding practices. More mealtime pressure was observed in parents with a higher BMI. DISCUSSION: Fathers' self-reports of their mealtime practices are reliable. Mothers' feeding practices may differ when fathers are present and further work should examine mothers at mealtimes with and without fathers. Although children's BMI was not related to parents' use of reported or observed control, parents with a higher BMI were more controlling, highlighting the importance of considering parents' own weight in future studies.

Is maternal psychopathology related to obesigenic feeding practices at 1 year?

OBJECTIVE: To investigate the relationship between maternal psychopathological symptomatology during pregnancy and at 6 and 12 months postnatally and maternal use of controlling and restrictive feeding practices at 1 year. RESEARCH METHODS AND PROCEDURES: Eighty-seven women completed a measure of psychological distress during pregnancy and at 6 and 12 months postpartum, and at 12 months postnatally these women reported their usage of controlling and restrictive feeding practices and were observed feeding their infants. RESULTS: General psychological distress, particularly anxious psychopathology, during pregnancy and at 6 and 12 months postnatally was significantly associated with maternal use of restrictive feeding practices at 1 year, even when controlling for length of breast-feeding and the infants' weights at 1 year. Contrary to expectations, depression and eating psychopathology as measured by the SCOFF eating disorder measure during pregnancy or at 6 or 12 months postnatally were not associated with the use of controlling or restrictive feeding practices at 1 year. DISCUSSION: These findings indicate that anxious maternal psychopathology may partially explain the development of maternal use of restriction when feeding.