The prevalence of food insecurity amongst refugees and asylum seekers during, and prior to, their early resettlement period in Australia: A cross-sectional analysis of the 'Building a New Life in Australia' data

With over 100 million humanitarian migrants globally, there is increasing pressure on high-income countries to offer resettlement opportunities. Humanitarian migrants face many challenges during pre-settlement and resettlement. One challenge is food insecurity (FI). The Building a New Life in Australia (BNLA) longitudinal cohort study gathered data from migrating units, that is, a group of humanitarian migrants included on the same visa application (n = 1599). Data were gathered in five annual waves (2013-2018). Data included food security status in four pre-settlement situations and during resettlement. The results of this secondary analysis of BNLA Wave One indicate that FI was highest in refugee camps (71%), followed by bridging visas (30%), community detention (17%), immigration detention (11%), and during early resettlement (9%). During early resettlement, respondents who were male, those from Afghanistan or Iran, and those living in a single person household reported the highest prevalence of FI. An association was found between having spent time on a bridging visa and FI during early resettlement (p < 0.01). This study's results are an important step in understanding the scale of FI and which sub-groups are most vulnerable, so the resources and policies of high-income countries can better meet food security needs during resettlement.

The Association Between Adverse Childhood Experiences and Preterm Delivery: A Latent Class Approach

Background: Racial and socioeconomic status (SES) disparities in preterm delivery (PTD) have existed in the United States for decades. Disproportionate maternal exposures to adverse childhood experiences (ACEs) may increase the risk for adverse birth outcomes. Moreover, racial and SES disparities exist in the prevalence of ACEs, underscoring the need for research that examines whether ACEs contribute to racial and SES disparities in PTD. Methods: We examined the relationship between ACEs and PTD in a longitudinal sample of N = 3,884 women from the National Longitudinal Study of Adolescent to Adult Health (1994-2018). We applied latent class analysis to (1) identify subgroups of women characterized by patterns of ACE occurrence; (2) estimate the association between latent class membership (LCM) and PTD, and (3) examine whether race and SES influence LCM or the association between LCM and PTD. Results: Two latent classes were identified, with women in the high ACEs class characterized by a higher probability of emotional abuse, physical abuse, sexual abuse, and foster care placement compared with the low ACEs class, but neither class was associated with PTD. Race and SES did not predict LCM. Conclusions: Our findings suggest that ACEs may not impact PTD risk in previously hypothesized ways. Future research should assess the impact of ACEs on the probability of having live birth pregnancies as well as the role of potential protective factors in mitigating the impact of ACEs on PTD.

Food and nutrition information requirements of Australian primary school parents

OBJECTIVE

To explore what Australian primary school parents want to learn about food and nutrition to improve their children's eating behaviours, as well as the associations between parents' personal and demographic characteristics and their views regarding their food and nutrition knowledge needs.

DESIGN

An online nationwide cross-sectional survey was conducted in 2021 using a mixed-methods approach. Logistic regression analysis was utilised to examine the relationship between parents' demographics, personal values and their views. Content analysis was performed using Leximancer.

SETTING

Australia.

PARTICIPANTS

Seven hundred and eighty-seven parents.

RESULTS

Fifty-one per cent wanted to learn more about food and nutrition to improve their children's healthy eating habits, and 77% of those preferred schools to provide that information. Online/printed newsletters and YouTube were the most preferred methods for receiving food and nutrition related information. Higher universalism-concern value (concern for the welfare of those in the larger society and world) scores were positively associated parents' preference for schools to provide food and nutrition-related information. Parents with non-English-speaking backgrounds and younger parents were more likely to want to learn about food and nutrition. Parents wanted to learn more about encouraging healthy eating, ideas for the lunchbox, food labels and age-specific portion sizes and recommendations.

CONCLUSIONS

Findings can inform public health educators and assist them in designing future food and nutrition education programmes and resources targeting primary school parents.

Australian adults cooked more and tried new recipes during COVID-19 restrictions and lockdowns

The lockdowns and restrictions due to COVID-19 caused changes in both food accessibility and availability for people around the globe resulting in changes in food habits and behaviours. To enable a better public health response to the next pandemic, lessons must be learnt from this most recent emergency. This study aimed to examine self-reported changes in food habits and behaviours, of Australian adults during COVID-19 restrictions in 2020. A cross-sectional, convenience, Australia-wide survey, with open-ended and closed-ended questions was conducted online. Respondents were asked to report their demographic characteristics, positive food habit development, worst food-related experiences, changes in food habits and behaviours and cooking and food preparation practices during the COVID-19 restriction period. Adult Australian residents, recruited through social media advertising of the survey. Respondents (n = 764) were mostly female (86%), over 55 years of age (57%, mean age (SD) 53.4 (18.1) years), and half (51%) were not in paid employment. Nearly two-thirds (63%) developed positive food habits, including trying new recipes (54%), eating less take-away (53%) and cooking from scratch (46%) during the COVID-19 restrictions. Furthermore, respondents reported including family members in food preparation and eating together as a family. Negative experiences included being unable to buy certain foods (due to lack of stock and store limits), cooking at home, and being unable to access some food outlets. Australians experienced both positive and negative food experiences during the COVID-19 pandemic and associated lockdown periods, with most experiencing positive changes such as cooking at home from scratch and trying new recipes and relying on less take-away. Females and those who experienced a change in employment status were more likely to develop positive new food habits.

Parental support for free school lunches in Australian primary schools: associated factors and perceived barriers

OBJECTIVE

(1) To explore the feasibility of such programmes in Australia, this study examined parents' views on free school lunch provision. (2) To examine the associations between parents' demographic and personal characteristics and their support for free universal school lunches.

DESIGN

An online cross-sectional survey of parents.

SETTING

Australia, April 2021.

PARTICIPANTS

Seven hundred and eighty-seven parents took the survey. They had a mean age of 40. The respondents were predominantly female (95 %) and had a university degree (72 %).

RESULTS

Fifty-three percentage of the respondents agreed that all students should have access to healthy and well-balanced, free school lunches. Parents were concerned about healthiness, catering, allergies and cost of school-provided school lunches. Ethnic background, universalism values and education levels were significantly associated with support for free school lunch provision. Non-native English-speaking parents were almost three times more likely to support free universal lunches in primary schools than their native English-speaking counterparts. Parents with higher universalism-concern values were more likely to endorse free lunches in primary school. However, the level of education was negatively associated with parents' support for free school lunches.

CONCLUSIONS

The survey results highlight the complexity of parental views on free school lunch provision. Parents' concerns regarding lunches should be considered in developing school lunch programmes that meet the needs and preferences of diverse communities. These findings can be used to guide future primary school lunch provision initiatives.

Food literacy and diet quality in young vegans, lacto-ovo vegetarians, pescatarians, flexitarians and omnivores

OBJECTIVE

To investigate whether food literacy competencies and diet quality vary between 16-to-24-year-olds vegans, lacto-ovo vegetarians, pescatarians, flexitarians and omnivores and to assess whether food literacy is associated with diet quality.

DESIGN

Cross-sectional study. Food literacy (general nutrition knowledge, critical nutrition literacy and food skills) and diet quality were measured using an electronic questionnaire.

SETTING

Southern Norway, September 2021 - March 2022.

PARTICIPANTS

Healthy 16-24-year-olds (n 165).

RESULTS

Overall, the mean general nutrition knowledge score was moderate (48·0 out of 67·0); the lowest mean score was found in omnivores and the highest in flexitarians (45·6 v. 51·5) (P = 0·034). The mean score of critical nutrition literacy was also moderate (3·7 out of 5·0); vegans showed higher scores compared to other dietary practices (P = 0·018). No difference was observed in food skills between the different dietary practices. The overall median diet quality score was 46·0 out of 80·0, lowest in omnivores and highest in vegans (42·0 v. 56·0) (P =< 0·001). In multivariate regression analyses, general nutrition knowledge, food skills and vegan dietary practice were significantly associated with higher diet quality.

CONCLUSIONS

We found moderate levels of food literacy across all dietary practices. The food literacy competencies, general nutrition knowledge and food skills were associated with higher diet quality in our sample. Omnivores showed both the lowest general nutrition knowledge level and lowest diet quality scores. In contrast, both flexitarians and vegans scored highest on general nutrition knowledge and diet quality scores, despite being one of the less restrictive and one of the strictest plant-based dietary practices, respectively.

Associations of a current Australian model of dietetic care for women diagnosed with gestational diabetes and maternal and neonatal health outcomes

BACKGROUND

Gestational diabetes mellitus (GDM) is a significant public health burden in Australia. Subsequent strain on healthcare systems is widespread and current models of care may not be adequate to provide optimal healthcare delivery. This study aimed to assess a current model of dietetic care with maternal and neonatal outcomes.

METHODS

Hospital medical record data from The Women's Hospital, Melbourne, for women with GDM (n = 1,185) (July 2105-May 2017) was retrospectively analysed. Adjusted linear and logistic regression were used to analyse associations between the number of dietitian consultations and maternal and neonatal health outcomes.

RESULTS

Half of all women (50%) received two consultations with a dietitian. 19% of women received three or more consultations and of these women, almost twice as many were managed by medical nutrition therapy (MNT) and pharmacotherapy (66%) compared with MNT alone (34%). Higher odds of any maternal complication among women receiving 3 + consultations compared to those receiving zero (OR = 2.33 [95% CI: 1.23, 4.41], p = 0.009), one (OR = 1.80 [95% CI: 1.09, 2.98], p = 0.02), or two (OR = 1.65 [95% CI: 1.04, 2.60], p = 0.03) consultations were observed. Lower odds of infant admission to the Neonatal Intensive Care Unit (NICU) were observed among women receiving one (OR = 0.38 [95% CI: 0.18, 0.78], p = 0.008), two (OR = 0.37 [95% CI: 15 0.19, 0.71], p = 0.003), or three + consultations (OR = 0.43 [95% CI: 0.21, 0.88], p = 0.02), compared to no consultations.

CONCLUSION

The optimal schedule of dietitian consultations for women with GDM in Australia remains largely unclear. Alternate delivery of education for women with GDM such as telehealth and utilisation of digital platforms may assist relieving pressures on the healthcare system and ensure optimal care for women during pregnancy.

A novel indicator of selection in utero

Background and objectives

Selection in utero predicts that population stressors raise the standard for how quickly fetuses must grow to avoid spontaneous abortion. Tests of this prediction must use indirect indicators of fetal loss in birth cohorts because vital statistics systems typically register fetal deaths at the 20th week of gestation or later, well after most have occurred. We argue that tests of selection in utero would make greater progress if researchers adopted an indicator of selection against slow-growing fetuses that followed from theory, allowed sex-specific tests and used readily available data. We propose such an indicator and assess its validity as a dependent variable by comparing its values among monthly birth cohorts before, and during, the first 10 months of the COVID-19 pandemic in Sweden.

Methodology

We apply Box-Jenkins methods to 50 pre-pandemic birth cohorts (i.e., December 2016 through January 2020) and use the resulting transfer functions to predict counterfactual values in our suggested indicator for selection for ten subsequent birth cohorts beginning in February 2020. We then plot all 60 residual values as well as their 95% detection interval. If birth cohorts in gestation at the onset of the pandemic lost more slow-growing fetuses than expected from history, more than one of the last 10 (i.e. pandemic-exposed) residuals would fall below the detection interval.

Results

Four of the last 10 residuals of our indicator for males and for females fell below the 95% detection interval.

Conclusions and implications

Consistent with selection in utero, Swedish birth cohorts in gestation at the outset of the COVID-19 pandemic included fewer than expected infants who grew slowly in utero.

Selection in utero against male twins in the United States early in the COVID-19 pandemic

OBJECTIVES

We aim to contribute to the literature reporting tests of selection in utero. The theory of reproductive suppression predicts that natural selection would conserve mechanisms, referred to collectively as selection in utero, that spontaneously abort fetuses unlikely to thrive as infants in the prevailing environment. Tests of this prediction include reports that women give birth to fewer than expected male twins, historically among the frailest of infants, during stressful times. The onset of the COVID-19 pandemic in the United States in Spring 2020 demonstrably stressed the population. We test the hypothesis that conception cohorts in gestation at the onset of the pandemic in the United States yielded fewer than expected live male twin births.

METHODS

We retrieved deidentified data on the universe of live births in the United States from the National Center for Health Statistics birth certificate records. We applied Box-Jenkins time-series methods to the twin secondary sex ratio computed for 77 monthly conception cohorts spanning August 2013 to December 2019 to detect outlying cohorts in gestation at the onset of the pandemic.

RESULTS

The twin secondary sex ratio fell below expected values in three conception cohorts (i.e., July, September, and October 2019, all p < .05) exposed in utero to the onset of the pandemic.

CONCLUSIONS

Our results add to prior findings consistent with selection in utero. The role of selection in utero in shaping the characteristics of live births cohorts, especially during the COVID-19 pandemic, warrants further scrutiny.

Postpartum Medicaid Eligibility Expansions and Postpartum Health Measures

Maternal mortality and morbidity in the United States are high compared with those in similar countries, and racial/ethnic disparities exist, with many of these events occurring in the later postpartum period. Proposed federal and recently enacted state policy interventions extend pregnancy Medicaid from covering 60 days to a full year postpartum. This study estimates the association between maintaining Medicaid eligibility in the later postpartum period (relative to only having pregnancy Medicaid eligibility) with postpartum checkup attendance and depressive symptoms using regression analysis, overall and stratified by race/ethnicity. People with postpartum Medicaid eligibility were 1.0%-1.4% more likely to attend a postpartum checkup relative to those with only pregnancy Medicaid eligibility overall, primarily driven by a 3.8%-4.0% higher likelihood among Hispanic postpartum people. Conversely, postpartum Medicaid is associated with a 2.2%-2.3% lower likelihood of postpartum checkup attendance for Black postpartum people. Postpartum eligibility is also associated with a 9.7%-11.6% lower likelihood of self-reported depressive symptoms compared with only pregnancy Medicaid eligibility for White postpartum people only. Postpartum Medicaid eligibility is associated with some improvements in maternal health care utilization and mental health, but differences by race and ethnicity imply that inequitable systems and structures that cannot be overcome by insurance alone may also play an important role in postpartum health.

Associations of dietetic care and pregnancy outcomes in women with gestational diabetes

Background

Gestational diabetes mellitus (GDM) is a significant, global public health problem. Subsequent strain on healthcare systems is widespread and multidisciplinary care may be inadequate. We assessed current nutrition management of GDM in a large, metropolitan maternity hospital in Melbourne, Australia and associations between the model of dietetic care and maternal and neonatal health outcomes.

Methods

Hospital medical record data from The Women’s Hospital, Melbourne for women with GDM (n = 1,185) (July 2105-May 2017) was retrospectively analysed. Adjusted linear and logistic regression were used to assess associations between the number of dietitian consultations and maternal and neonatal health outcomes.

Results

Half of all women received two consultations with a dietitian. Nineteen percent of women received three or more consultations and of these women, almost twice as many were managed by medical nutrition therapy (MNT) and pharmacotherapy (66%) compared with MNT alone (34%). Odds of maternal complications increased with number of consultations (p = 0.008). Lower odds of infant admission to the Neonatal Intensive Care Unit were observed among women receiving one (OR = 0.38 [95% CI: 0.18, 0.78], p = 0.008), two (OR = 0.37 [95% CI: 15 0.19, 0.71], p = 0.003), or three+ dietitian consultations (OR = 0.43 [95% CI: 0.21, 0.88], p = 0.020), compared to no consultations.

Conclusions

The optimal schedule of dietitian consultations for women with GDM in Australia is unclear. Alternative delivery of nutrition education for women with GDM such as telehealth and utilisation of technology may assist in relieving public health and healthcare system pressures and ensure optimal pregnancy outcomes.

Key messages

• Delivering medical nutrition therapy through individual consultations does not deliver a linear benefit to women with GDM and their offspring.

• Alternative delivery modes are needed to optimise outcomes for healthcare services and their patients.

How young adults in Australia classify foods as healthy and unhealthy

Young Australian adults exhibit poor food behaviour however, there is limited research as to why young adults choose to eat healthy or unhealthy foods. This study aimed to explore how young adults' (18-30 years) in Australia classify foods as healthy and unhealthy. Through a social-constructivist approach, 38 young adults (76% females and 21% males; mean age = 24.1 years) were interviewed Australia-wide. Data were thematically analysed. Participants were classified into three groups based on their living arrangements namely, parental, shared and independent households. Four themes emerged, food preparation; food groups; nutrient composition and perceived impact. Food classification criteria based on nutrients were the most frequently used criterion to classify foods as unhealthy. A strong emphasis was placed on avoiding less healthy nutrients and there were limited discussions about beneficial nutrients. Participants belonging to the different household groups defined 'moderation' in several ways to justify their consumption of unhealthy foods. Reading food labels was a key criterion for evaluating healthiness amongst the participants of the parental and independent household groups, not among the shared household group. Findings reveal how living arrangements influenced young adults' perceptions of healthiness. Future public health policy could incorporate the language of young adults identified in this study in the transfer of nutritional knowledge to young adults.

Strategies used by schools to tackle food insecurity and hunger: a qualitative enquiry in 15 Victorian schools

OBJECTIVE

Food insecurity is a threat to children's development and in Australia 13.5% of households experience food insecurity. Universal school food programs, however, are not provided nationally. Teachers and not-for-profit organisations have instead mobilised to tackle hunger. The strategies used and their effects on students have limited empirical evidence. The aim of this study is to gain perspectives on the causes and consequences of children's food insecurity in schools and describe food security strategies adopted.

METHOD

One hundred schools in Victoria, which participate in a not-for-profit lunch program provided by Eat Up were invited to take part in the study. Fifteen staff (including school principals and welfare officers) from 15 schools were recruited for semi-structured interviews.  Results: There was evidence that children experience adverse quantity, quality, social and psychological impacts of food insecurity whilst in school settings. Participants described employing multiple strategies including free meals (e.g. lunch, breakfast) and food (e.g. parcels) for food insecure students and their families. Conclusions and implications for public health: In our sample, multiple strategies were being employed by schools to reduce food insecurity, but there remains unmet need for additional wide-scale initiatives to address this critical issue and its causes and consequences.

The Impact of the COVID-19 Pandemic on Young Australian Adults' Food Practices

Background

Young Australian adults exhibit poor food behaviors. These include increased consumption of Energy-Dense, Nutrient-Poor (EDNP) foods, sugar-sweetened beverages, and low consumption of fruit and vegetables. However, little is known about how the coronavirus disease 2019 (COVID-19) pandemic affected young Australian adults' pre-existing adverse food behaviors.

Objectives

The present study aimed to understand the impact of the COVID-19 pandemic on food practices by exploring views of young adults living in Australia.

Methods

Through qualitative descriptive methods, data gathered through individual interviews were thematically analyzed. Participants included 38 young adults aged 18-30 y with a mean age of 24.1 y (76% female).

Results

Five themes emerged: 1) disruption of routines, 2) increased flexibility, 3) changes in food practices, 4) heightened psychological distress, and 5) impact on future behaviors. Disruption of routines and increased flexibility associated with working/learning from home resulted in both positive and negative changes in food practices. Negative changes included increased consumption of EDNP foods, increased consumption of foods prepared outside of home, decreased purchases and consumption of fresh foods, meal skipping, and a lack of meal planning. Positive changes included an increase in home cooking; consistent weekly eating patterns; decreased consumption of EDNP foods; smaller, more frequent meals; and decreased consumption of foods prepared outside of home.

Conclusions

Young Australian adults reported more negative and fewer positive changes in food practices. The observed negative changes in food practices are likely to have accentuated young Australian adults' previously known poor food behaviors. This study adds to the international literature by reporting ways that young adults implemented positive changes during the pandemic and future directions of their food practices.

Twinning during the pandemic: Evidence of selection in utero

Background and objectives

The suspicion that a population stressor as profound as the COVID-19 pandemic would increase preterm birth among cohorts in gestation at its outset has not been supported by data collected in 2020. An evolutionary perspective on this circumstance suggests that natural selection in utero, induced by the onset of the pandemic, caused pregnancies that would otherwise have produced a preterm birth to end early in gestation as spontaneous abortions. We test this possibility using the odds of a live-born twin among male births in Norway as an indicator of the depth of selection in birth cohorts.

Methodology

We apply Box–Jenkins methods to 50 pre-pandemic months to estimate counterfactuals for the nine birth cohorts in gestation in March 2020 when the first deaths attributable to SARS-CoV-2 infection occurred in Norway. We use Alwan and Roberts outlier detection methods to discover any sequence of outlying values in the odds of a live-born twin among male births in exposed birth cohorts.

Results

We find a downward level shift of 27% in the monthly odds of a twin among male births beginning in May and persisting through the remainder of 2020.

Conclusions and implications

Consistent with evolutionary theory and selection in utero, birth cohorts exposed in utero to the onset of the COVID-19 pandemic yielded fewer male twins than expected.

Lay Summary

Our finding of fewer than expected male twin births during the onset of the COVID-19 pandemic provides more evidence that evolution continues to affect the characteristics and health of contemporary populations.

Enough time for lunch? The duration and governance of lunch eating times in Australian primary schools: A mixed-methods study

Developing healthy eating behaviours is important to assist children in maintaining good health and decrease the risk of chronic health conditions. Recent nutrition promotion efforts in Australian primary schools have mainly focused on canteen guideline compliance and obesity prevention interventions. The aim of this study was to investigate the primary school food environment, specifically, allocated lunch eating duration and the governance of children's lunch breaks. Parents (n = 402) and teachers (n = 123) were asked via an online survey, about school allocated lunch eating duration and its adequacy. Respondents were asked about the supervision, monitoring and feedback of children's lunches, as well as how they felt about these practices. Parents (n = 308) and teachers (n = 102) also responded to the open-ended question "What could be done to improve the school food environment at your school?". Ten minutes was the allocated lunch eating duration reported by most parents and teachers and 58% of those parents and 30% of those teachers rated this as inadequate. Increasing the allocated lunch eating duration was frequently cited as a way to improve the school food environment. A similar proportion of parents and teachers agreed with teachers monitoring food intake, not providing feedback on food brought to school, and that parents should decide what children eat. More parents (44%) than teachers (23%) believed that teachers should eat their own lunch with the children. These findings provide an insight into the primary school lunch environment and the views of two key stakeholder groups. School food policies should consider these findings in future revisions, particularly with regards to eating times.

Essential food and nutrition knowledge and skills for primary school children: Australian parents' opinions

Purpose

This paper examines the views of Australian primary school parents regarding the food and nutrition education (FNE) curriculum. Associations with personal values (Universalism and Hedonism) and demographic measures were also explored.

Design/methodology/approach

An online survey was conducted among 787 parents in March 2021. Parents rated the importance of 17 FNE topics. They were also asked about their support for six curriculum improvements and to state their own improvement suggestions.

Findings

Parents viewed the “Effect of food on health” and “Food hygiene” as the most important topics. Three FNE components were derived: (1) food safety and preparation, (2) health and nutrition information, (3) food origins and environmental sustainability. The “Food safety and preparation” component score was associated with both universalism-nature and hedonism values but negatively associated with parental education. The “Health and nutrition information” component score was associated with universalism-nature value and main language spoken at home. Lastly, the “Food origins and environmental sustainability” component score was associated with universalism-nature value. The two personal values, universalism-nature and hedonism, were more strongly associated with parents' views of curriculum topics than parental demographic characteristics. Parents had several criticisms of current FNE, including school food environments not resonating with FNE taught in the classroom and that FNE might increase the risk of eating disorders. They also suggested that the FNE curriculum should support both parents and teachers by providing relevant resources and training.

Originality/value

Australian parents' views of the importance of FNE topics and how to improve FNE in primary schools have been under-examined.

Parents' and teachers' views of the promotion of healthy eating in Australian primary schools

BACKGROUND

Primary schools have long been identified as appropriate settings for improving the healthy eating behaviours of children and helping them develop food skills. This qualitative study explored the views of Australian primary school parents and teachers about schools' strengths and weaknesses in promoting healthy eating and equipping children with food skills.

METHODS

Nineteen parents and 17 teachers from Victoria participated in semi-structured interviews. Audio recordings were transcribed and underwent thematic analysis using Nvivo.

RESULTS

This study demonstrated that parents and teachers believed that several facilitators helped promote children's healthy eating. These included food and nutrition education (FNE) programs, the community-based nature of schools, and teacher role modelling and the authority schools possess over children. Time scarcity, lack of teacher expertise, lack of leadership and funding were reported as barriers. School food environments such as canteens, lunch orders, fundraising events and school fairs were identified as both weaknesses and strengths by parents and teachers, which indicated inconsistent implementation of school nutrition policies across schools.

CONCLUSIONS

Australian primary schools demonstrate some useful efforts to promote healthy eating among children. However, there are numerous facilitators and barriers which impact on the promotion of healthy eating. These factors need to be addressed in order to develop healthy eating habits further among elementary students. These results provide directions for policymakers and school managers, as they point to the areas that need to be improved to assist the design of schools that better promote healthy eating among children.

Teachers' self-efficacy beliefs in teaching food and nutrition subjects in Australian secondary schools

Purpose

Teachers play important roles in school food and nutrition education. This study aims to explore Australian teachers' self-efficacy beliefs (i.e. belief in their own capabilities to perform specific teaching tasks) in teaching secondary school food and nutrition-related subjects.

Design/methodology/approach

Teachers' overall self-efficacy beliefs in teaching these subjects (overall-SEB) and self-efficacy beliefs in teaching different food and nutrition-related topics (topics-SEB) were explored using a survey among 183 teachers in 2017. Principal components analysis derived three overall-SEB components: “Motivation and accommodation of individual differences”, “Classroom management” and “Communication and clarification” and three topics-SEB components: “Food system”, “Food and nutrition information” and “Food preparation”.

Findings

Overall, higher percentages of teachers were confident or very confident in the majority of items that loaded on “Classroom management” and “Communication and clarification” compared to “Motivation and accommodation of individual differences”. Moreover, higher percentages of teachers were confident or very confident about items that loaded on “Food and nutrition information” and “Food preparation” compared” to “Food system”. The overall-SEB and topics-SEB were higher among more experienced teachers. There were moderate positive correlations between overall-SEB and topics-SEB components.

Originality/value

The exploration of broader aspects of self-efficacy beliefs related to teaching secondary school food and nutrition-related subjects makes this study unique. The findings highlight that these teachers had high self-efficacy beliefs in teaching food and nutrition education, but there are gaps in tailoring the teaching process to meet the diverse needs of students and teaching broader food-related topics.

A systematic review and meta-analysis of 24-h urinary output of children and adolescents: impact on the assessment of iodine status using urinary biomarkers

PURPOSE

Urinary iodine concentration (UIC (μg/ml) from spot urine samples collected from school-aged children is used to determine the iodine status of populations. Some studies further extrapolate UIC to represent daily iodine intake, based on the assumption that children pass approximately 1 L urine over 24-h, but this has never been assessed in population studies. Therefore, the present review aimed to collate and produce an estimate of the average 24-h urine volume of children and adolescents (> 1 year and < 19 years) from published studies.

METHODS

EBSCOHOST and EMBASE databases were searched to identify studies which reported the mean 24-h urinary volume of healthy children (> 1 year and < 19 years). The overall mean (95% CI) estimate of 24-h urine volume was determined using a random effects model, broken down by age group.

RESULTS

Of the 44 studies identified, a meta-analysis of 27 studies, with at least one criterion for assessing the completeness of urine collections, indicated that the mean urine volume of 2-19 year olds was 773 (654, 893) (95% CI) mL/24-h. When broken down by age group, mean (95% CI) 24-h urine volume was 531 mL/day (454, 607) for 2-5 year olds, 771 mL/day (734, 808) for 6-12 year olds, and 1067 mL/day (855, 1279) for 13-19 year olds.

CONCLUSIONS

These results demonstrate that the average urine volume of children aged 2-12 years is less than 1 L, therefore, misclassification of iodine intakes may occur when urine volumes fall below or above 1 L. Future studies utilizing spot urine samples to assess iodine status should consider this when extrapolating UIC to represent iodine intakes of a population.

A qualitative investigation of school age children, their parents and school staff on their participation in the Digital Education to LImit Salt in the Home (DELISH) program

This study explored the views of participants who completed a 5-week, online, interactive, family-based, salt reduction education program (Digital Education to LImit Salt in the Home). A secondary aim was to explore the views of school staff on the delivery of food and nutrition education in schools. Children aged 7-10 years, their parents and principals/teachers from participating schools located in Victoria, Australia, completed a semi-structured evaluation interview. Audio-recordings of interviews were transcribed verbatim and analysed using NVivo. Twenty-eight interviews (13 children; 11 parents; 4 school staff) were included. Thematic analysis revealed that the program was well received by all groups. Children reported that the interactivity of the education sessions helped them to learn. Parents thought the program was interesting and important, and reported learning skills to reduce salt in the family diet. School staff supported the delivery of nutrition education in schools but indicated difficulties in sourcing well-packed nutrition resources aligned with the curriculum. It appears that there is support from parents and teachers in the delivery of innovative, engaging, nutrition education in schools, however such programs need to be of high quality, aligned with the school curriculum and readily available for incorporation within the school's teaching program.

Impact of nutritional status/risk and post-operative nutritional management on clinical outcomes in patients undergoing gastrointestinal surgery: a prospective observational study

BACKGROUND

Malnutrition is prevalent in patients undergoing gastrointestinal (GI) surgery and has been linked to adverse outcomes. The present study aimed to determine the association between early post-operative nutritional status/risk, post-operative nutritional management and clinical outcomes.

METHODS

A prospective observational study was conducted in GI surgical patients with a minimum 3-day post-operative length of stay (LOS). Data on patient demographics, nutritional status/risk, post-operative nutritional management and clinical outcomes were collected. Four markers of nutritional status and risk were assessed: preoperative weight loss, nutrition risk, malnutrition status and hand grip strength. Clinical outcomes included: post-operative LOS, complication and readmissions rates. Multivariate linear and logistic regression were used to test for associations with clinical outcomes.

RESULTS

One hundred and fifteen patients (55% female) with mean (SD) age of 60.8 (16.2) years were included. Median (IQR) post-operative LOS was 8.0 days (4.5-11.5), 37% of participants developed at least one complication post-operatively and 24% were readmitted within 30-days of discharge. Mean number of nil-by mouth (NBM) days post-operatively was 0.7 (1.2) and the average time to commence feeding was 3.3 (2.2) days after surgery. Poor nutritional status/risk between days 3-5 post-operatively assessed through all four markers was associated with longer post-operative LOS (all P < 0.05). No association was found between number of NBM days, time to feeding and clinical outcomes.

CONCLUSION

Poor early post-operative nutritional status/risk is associated with longer post-operative LOS in patients undergoing GI surgery, which may facilitate simple identification of patients at high priority for nutritional intervention. The present study highlights the heterogeneity in post-operative nutritional management practices.

Food and nutrition education opportunities within Australian primary schools

Schools are regarded as a key setting for obesity prevention, providing an opportunity to reach a large number of children, frequently and over a prolonged period, through formal and informal opportunities to learn about health behaviours. However, the low value placed on health versus academic achievement is a barrier to effective implementation of food and nutrition (F&N) education. This study used a qualitative exploratory approach to explore the views of teachers and key health and education sector stakeholders regarding opportunities for F&N education within the Australian primary school setting. To the best of our knowledge, this is the first study to explore this topic from the perspectives of state-level coordination and development through to local-level implementation and support within the Australian primary school context. Only 2.6% of the Victorian Curriculum related to F&N education, taught through two (of seven) learning outcomes: Health and Physical Education, and Technologies. While stakeholders considered child health a priority, and schools an ideal setting for F&N education, barriers included a lack of strategic policy alignment, limited leadership and coordination, a ‘crowded curriculum’ and poor availability of shelf-ready resources with explicit curriculum links. A cross-curriculum approach was considered essential for F&N education to become embedded as a core component of the curriculum.

Associations between dietary patterns and blood pressure in a sample of Australian adults

BACKGROUND

Investigating effects of whole diets on blood pressure (BP) can contribute to development of diet-based recommendations for health. Our aim was to assess the relationship between dietary patterns and BP in a sample of free-living Australian adults.

METHODS

Usual dietary patterns of participants recruited to dietary intervention studies were assessed using factor analysis (two 24-h recalls). The mean of seven days of daily, seated BP measurements were used.

RESULTS

Complete data from 251 participants (112 males; mean age 55.1(9.1) (SD) years; body mass index (BMI) 29.5(3.9) kg/m²) was included. Three dietary patterns were identified. Only Dietary Pattern 2 was positively associated with home systolic BP (β = 1.88, 95% CI 0.16, 3.60) after adjusting for age, sex, BMI, anti-hypertensive medication, smoking, education, physical activity and energy intake. This dietary pattern was characterised by high consumption of low-fibre bread, pasta, noodles and rice, meat dishes, poultry dishes and egg dishes, mixed cereal dishes, salted nuts and low consumption of milk and yoghurt (low-fat), vegetable juice, vegetables and high-fibre bread. Dietary Pattern 2 was also positively associated with intakes of energy (P = 0.002) and sodium (P = 0.005) and inversely associated with potassium intake (P = 0.002). After adjustment for energy, only the inverse association with potassium remained (P <  0.001).

CONCLUSIONS

In this sample of Australian adults, Dietary Pattern 2 was associated with higher BP and thus chronic disease risk, supporting the evidence that diets high in energy and sodium, and low in potassium from vegetables and dairy, are detrimental to cardiovascular health.

Longitudinal measures of neighborhood poverty and income inequality are associated with adverse birth outcomes in Texas

BACKGROUND

Inequity in adverse birth outcomes between black and white women in the U.S. is persistent, despite decades of research and prevention efforts. Neighborhood environments are plausibly related to pre-pregnancy health and other risk factors for adverse birth outcomes and may help explain black/white inequities. Despite the fact that neighborhoods change over time, most prior work has relied upon cross-sectional measures of neighborhood economic contexts.

METHODS

We used birth certificates for non-Hispanic black and white women in Texas (2009-2011, N = 470,896) to examine whether longitudinal measures of neighborhood economic context (poverty and income inequality, based on census tract data from 1990 to 2010) were associated with preterm birth, low birthweight and small-for-gestational-age (SGA) with hierarchical generalized linear models. We also tested whether (1) the longitudinal measures explained black/white inequities or (2) moderated the effect of race on the birth outcomes. Finally, we compared the models with longitudinal measures to models with cross-sectional measures of neighborhood economic context.

RESULTS

Longitudinal measures of neighborhood economic context were associated with all three birth outcomes, but did not explain racial inequities. Except for income inequality and SGA, there was no evidence of moderation by race. Substituting cross-sectional measures of economic context for longitudinal ones resulted in similar findings.

CONCLUSION

Policies that either address structural neighborhood-level economic disadvantage or mitigate the effects of such disadvantage are warranted to improve the health of mothers and prevent adverse birth outcomes.

Associations of dietetic management with maternal and neonatal health outcomes in women diagnosed with gestational diabetes: a retrospective cohort study

BACKGROUND

In 2010, the recommended diagnostic thresholds for gestational diabetes mellitus (GDM) were amended, which has increased GDM diagnoses, as well as pressure on the services involved in GDM management, specifically impacting dietetic workloads. The present study examined the associations between dietetic intervention in women with GDM and maternal and neonatal health outcomes.

METHODS

The present study involved 1233 adult women with GDM who delivered at The Royal Women's Hospital (RWH), Melbourne, Australia, between July 2015 and May 2017. Retrospective data assessing GDM-care (therapy type, diagnosis time and model of care, maternal and neonatal health outcomes, and outpatient dietetic consultations) were retrieved from patient medical records. Unadjusted and adjusted linear and logistic regression were used to assess associations of GDM care dietetic intervention and GDM care and dietetic intervention with maternal and neonatal health outcomes.

RESULTS

Women receiving dietetic intervention had a decreased likelihood of infant admission to the neonatal intensive care unit or special care nursery than women who not receiving dietetic intervention [adjusted odds ratio (OR) = 0.41, 95% confidence interval (CI) = 0.22-0.75; P = 0.004). Women requiring pharmacotherapy were more likely to experience maternal complications (adjusted OR = 3.13, 95% CI = 2.23-4.41; P < 0.001) and had a greater number of dietetic consultations (β-coefficient = 0.28, 95% CI = 0.17-0.39; P < 0.001) compared to women managed through diet.

CONCLUSIONS

Dietetic intervention plays a key role in optimising maternal and neonatal health outcomes for women with GDM. Exploring further the impact of dietetic intervention in women diagnosed with GDM is key with respect to understanding the optimal delivery of care for these women. The type and number of consultations included in a dietetic intervention should be investigated further.

Comparison of salt-related knowledge, attitudes and behaviours between parents and caregivers of children under 18 years of age and other adults who do not care for children under 18 years of age in Victoria, Australia

Background/Aims

Salt intake among Australian adults exceeds recommendations, increasing the risk of cardiovascular disease. Knowledge, attitudes and behaviours (KABs) are modifiable factors that may influence salt consumption. It is not known whether salt-related KABs among parents and caregivers of children under 18 years of age differ from other adults who do not care for children under 18 years of age. Therefore, we aimed to determine whether salt-related KABs differed between parents and caregivers and other adults. This information can be used to inform messages included in salt reduction consumer awareness campaigns.

Methods

Adults, aged 18–65 years, were recruited from four shopping centres, Facebook and a consumer research panel in the state of Victoria, Australia. Participants indicated if they were a parent or a caregiver of a child/children <18 years (‘parents/caregivers’) or not (‘other adults’). Regression models, adjusted for covariates, assessed differences in KABs between the two groups. Construct scores for KABs were developed, with high scores for knowledge indicative of high salt-related knowledge, for attitude indicative of lower importance of using salt to enhance the taste of food, and for behaviours indicative of higher frequency of engaging in behaviours to reduce salt in the diet.

Results

A total of 840 parents/caregivers and 1558 other adults completed the survey. Just over half of the parents/caregivers and other adults were female, with a mean (SD) age of 41.1 (10.3) years and 44.3 (15.3) years, respectively. Mean construct scores for salt-related KABs were similar between the two groups. Parents/caregivers were less likely to be aware of the relationship between salt and sodium (OR=0.73, p=0.002) and more likely to report difficulty in interpreting sodium information displayed on food labels (OR=1.36, p=0.004). Parents/caregivers were more likely to be concerned about a range of food-related issues, including the amount of saturated fat, sugar and salt in food. Parents/caregivers were more likely to report that they were trying to reduce their salt intake (OR=1.27, p=0.012) and more likely to report adding salt at the table (OR=1.28, p=0.008).

Conclusions

There were some differences in salt-related KABs between parents/caregivers and other adults. These findings provide insight into particular messages that could be focused on in consumer awareness campaigns that seek to improve parents’/caregivers’ KABs related to salt intake. Specifically, messages targeted at parents/caregivers should include practical guidance to reduce table salt and resources to assist in interpreting sodium information on food labels and the relationship of sodium to salt.

The Digital Education to Limit Salt in the Home Program Improved Salt-Related Knowledge, Attitudes, and Behaviors in Parents

Background

Currently, Australian children and adults are eating too much salt, increasing their risk of cardiovascular-related conditions. Web-based programs provide an avenue to engage the parents of primary schoolchildren in salt-specific messages, which may positively impact their own salt-related knowledge, attitudes, and behaviors (KABs).

Objective

This pilot study aimed to determine whether parents’ salt-related KABs improved following participation in the Digital Education to LImit Salt in the Home (DELISH) Web-based education program.

Methods

The DELISH program was a 5-week, home-delivered, Web-based intervention, with a pre- and posttest design, targeting schoolchildren aged 7 to 10 years and their parents. Parents received weekly Web-based educational newsletters and text messages and completed online pre- and postprogram surveys assessing salt-related KABs. Upon completion of the program, all parents were also invited to complete an online evaluation survey. Changes in KABs outcomes were assessed using McNemar tests and paired t tests.

Results

Of the 80 parents that commenced the program, 73 parents (mean age 41.0, SD 7.0 years; 86% (63/73) females) completed both pre- and postsurveys. Overall, mean score for salt-related knowledge improved (+3.6 [standard error (SE) 0.41] points), and mean behavior score also improved (+4.5 [SE 0.61] points), indicating a higher frequency of engaging in behaviors to reduce salt in the diet, and mean attitude score decreased (−0.7 [SE 0.19] points), representing lower importance of using salt to enhance the taste of food (all P<.001). Following participation, the proportion of parents aware of the daily salt intake recommendation increased from 40% (29/73) to 74% (54/73) (P<.001), and awareness of bread as the main source of salt increased from 58% (42/73) to 95% (69/73) (P<.001). The proportion of parents who agreed that salt should be used in cooking to enhance the flavor of food decreased from 30% (22/73) to 11% (8/73) (P=.002) and the proportion who agreed that sodium information displayed on food labels was difficult to understand decreased from 52% (38/73) to 32% (23/73) (P=.009). There was a reduction in the proportion of parents who reported adding salt during cooking (55% [40/73] vs 41% [30/73]; P=.03) and at the table (32% [23/73] vs 18% [13/73]; P=.002). Of the 16 parents who completed the evaluation survey, 75% (12/16) enjoyed the program, and all parents found the newsletters to be useful. Almost all parents (15/16, 94%) agreed that the DELISH program would be useful to other parents.

Conclusions

The improvement in salt-related KABs in the DELISH program indicates the potential for online technology, to disseminate simple salt reduction education messages to families with primary school–aged children. Future work should seek to improve the quality of data collected by including a larger sample size and a control group to integrate the program within the school setting to enable wider dissemination.

Salt consumption by Australian adults: a systematic review and meta-analysis

OBJECTIVE

Salt reduction is a public health priority because it is a leading contributor to the global burden of disease. As in Australia there is uncertainty about the current level of salt intake, we sought to estimate current levels.

STUDY DESIGN

Random effects meta-analysis of data from 31 published studies and one unpublished dataset that reported salt or sodium consumption by Australian adults on the basis of 24-hour urine collections or dietary questionnaires.

DATA SOURCES

MEDLINE (via Ovid) and EMBASE (to August 2016).

DATA SYNTHESIS

Thirty-one published studies and one unpublished dataset (1989-2015; 16 836 individuals) were identified. The mean weighted salt consumption estimated from 24-hour urine collections was 8.70 g/day (95% CI, 8.39-9.02 g/day); after adjusting for non-urinary salt excretion, the best estimate of salt intake in Australia is 9.6 g/day. The mean weighted intake was 10.1 g/day (95% CI, 9.68-10.5 g/day) for men and 7.34 g/day (95% CI, 6.98-7.70 g/day) for women. Mean weighted consumption was 6.49 g/day (95% CI, 5.94-7.03 g/day) when measured with diet diaries, 6.76 g/day (95% CI, 5.48-8.05 g/day) when assessed with food frequency questionnaires, and 6.73 g/day (95% CI, 6.34-7.11) when assessed by dietary recall. Salt intake had not decreased between 1989 and 2015 (R² = -0.02; P = 0.36).

CONCLUSION

Salt intake in Australian adults exceeds the WHO-recommended maximum of 5 g/day and does not appear to be declining. Measuring salt intake with methods based on self-reporting can substantially underestimate consumption. The data highlight the need for ongoing action to reduce salt consumption in Australia and robust monitoring of population salt intake.

Maternal serum uric acid levels in pregnancy and fetal growth

Objective: Studies of maternal serum uric acid (UA) in pregnancy focus primarily on high levels of UA, however, both low and high UA levels can be markers of oxidative stress, a biological state potentially linked to fetal growth. We therefore aimed to test whether low and high maternal serum UA levels during pregnancy are associated with atypical fetal growth (unusually small or large) measured as birthweight (BW) for gestational age.Methods: The Pregnancy Outcomes and Community Health Study enrolled 3019 pregnant women between their 16th-27th week of pregnancy from 52 clinics in five Michigan communities (1998-2004). Maternal UA levels were measured in blood collected at enrollment among a subcohort of 1291 participants. Infant BW and gestational age were used to calculate gestational age-specific BW Z-score. Infants were grouped as small (SGA = BW < 10th percentile), appropriate (AGA = BW 10th-90th percentile), or large (LGA) = BW > 90th percentile) for their gestational age. Analyses considered multiple potential confounders. Linear spline or multiple linear regression models were applied to evaluate the relationship between maternal UA levels and BW Z-score overall and within SGA, AGA, and LGA groups. Model robustness was tested through bootstrap, sensitivity analysis, and cross-validation techniques.Results: The relation between maternal UA levels and BW Z-score varied by infant group. Among SGA infants, the relation was nonlinear (J-shape): both extremes of UA had lower BW Z-score with a breakpoint of 0.267 mmol/L UA (adjusted regression coefficient β = 2.32, p = .01 for lower UA; adjusted β = -37.38, p < .01 for higher UA). Among AGA infants, there was no significant association, and among LGA infants, the relation was linear (adjusted β = 2.86, p = .03).Conclusions: Future research on maternal UA levels in pregnancy may benefit from considering both very low and high levels, and identifying in utero conditions associated with the two extremes.

Digital Education to Limit Salt in the Home (DELISH) Program Improves Knowledge, Self-Efficacy, and Behaviors Among Children

OBJECTIVE

To determine the efficacy of a Web-based salt reduction program on children's salt-related knowledge, attitudes, and behaviors (KABs), self-efficacy, and intake of dietary salt.

DESIGN

Pretest and posttest. An online survey determined KABs and self-efficacy and a 24-hour urine collection revealed salt intake.

SETTING

Victoria, Australia.

PARTICIPANTS

Child-parent dyads (n = 102) recruited from 5 government schools.

INTERVENTION

A 5-week behavior-based education program delivered via weekly online interactive education sessions.

MAIN OUTCOME MEASURES

Change in KABs, self-efficacy, and daily salt intake.

ANALYSIS

Changes in outcomes were assessed using McNemar test, paired t test, and Cohen's δ (CD).

RESULTS

A total of 83 children participated (mean age, 9.2 years [SD, 0.8 years]; 59% girls); 35% to 76% of children viewed weekly education session. Children with complete survey data (n = 75) had improved scores for salt-related knowledge (+3.6 ± 0.4 points; P < .001; CD: 1.16), behaviors (+1.3 ± 0.1 points; P < .001; CD: 1.08), and self-efficacy (+0.9 ± 0.2 points; P < .001; CD: 0.64), but not attitude. Children with valid urine collections (n = 51) showed no change in salt intake.

CONCLUSIONS AND IMPLICATIONS

Participation resulted in improvement of salt related knowledge, self-efficacy and behavior. Further research is required to confirm these results using a more robust study design which includes a control group. In addition, the long term impact on children's salt intakes of comparable education programs needs to be assessed.

Exploring the impact of Aboriginal health placement experiences on the preparation of dietetic graduates for practice with Aboriginal communities

AIM

A health workforce with the ability to practice with Aboriginal communities is crucial to bridge the health gap between Aboriginal and non-Aboriginal Australians. This study aimed to explore the impact of university Aboriginal health placements on preparing dietetic graduates for practice with Aboriginal communities.

METHODS

A mixed methods sequential explanatory design was used. A sample of 594 dietetic graduates was invited to complete a survey that identified Aboriginal health experiences and measured attitudes and self-confidence towards working in Aboriginal health using a five-point Likert scale. Participants were divided into placement versus no-placement groups and compared using chi-squared tests. Sixteen of 33 participants who had completed an Aboriginal health placement were invited to participate in a semi-structured interview to explore how placement influenced practice with Aboriginal communities. Interviews were analysed using content analysis.

RESULTS

A final sample of 120 participants showed that placement participants reported significantly higher self-confidence towards working in Aboriginal health compared with no-placement participants (No-placement = 35% agree, 36% neutral, 29% disagree; Placement = 74% agree, 11% neutral, 16% disagree; χ² (2, 88) = 9.4; P = 0.01). Fifteen participants were interviewed. Interview data indicated that situated learning experiences, breaking down stereotypes, empathy through learning from Aboriginal people, and Aboriginal health role-models were key components of Aboriginal health placements in preparing dietetic graduates for practice with Aboriginal communities.

CONCLUSIONS

The results suggest that Aboriginal health placements may be an effective strategy for preparing dietetic graduates for practice with Aboriginal communities. The feasibility of placement or alternative curriculum content needs to be explored.

Maternal serum uric acid levels and blood pressure during pregnancy: A community-based cohort study

OBJECTIVE

Studies find both very low and high serum uric acid (UA) levels are related to oxidative stress and to conditions such as cardiovascular diseases and chronic kidney disease in the general population. Pregnancy studies have focused only on high maternal UA. In present study, we tested whether unusually high and low levels of maternal serum UA are associated with increases in blood pressure (BP) during pregnancy.

STUDY DESIGN

The Pregnancy Outcomes and Community Health Study enrolled 3019 pregnant women between their 16th-27th week of pregnancy from 52 clinics in 5 Michigan communities (1998-2004). UA levels were measured in maternal blood collected at enrollment from a sub-cohort of 1223 participants. BP was abstracted from prenatal medical records; these analyses used highest recorded diastolic BP (DBP) and its companion systolic BP (SBP). Mean arterial pressure (MAP) was calculated using the formula of (2 × DBP + SBP)/3. Covariates, including maternal race/ethnicity, age at enrollment, education level, medical insurance status, body mass index before pregnancy, parity, smoking during pregnancy, alcohol use during pregnancy, and gestational week at blood collection, were considered as potential confounding variables. Associations between UA levels and BP were evaluated with linear spline or multiple linear regression models. Models' robustness was examined with bootstrap estimation of variance, sensitivity analysis, and 10-fold cross-validation.

RESULTS

Both DBP and MAP had a J-shaped relationship with maternal UA; the breakpoints (nadirs) were 0.153 and 0.161 mmol/L UA, respectively. For DBP versus UA, adjusted regression coefficient (β) = -95.67 (standard error (SE) = 37.67 and p = 0.01) for the left and adjusted β = 48.95 (SE = 9.56 and p < 0.01) for the right; for MAP versus UA, adjusted β = -58.48 (SE = 31.42 and p = 0.06) for the left and adjusted β = 52.23 (SE = 11.39 and p < 0.01) for the right. Maternal SBP followed a positive linear trend with UA levels (adjusted β = 37.75, SE = 12.93, and p < 0.01). All results were robust.

CONCLUSION

Extreme high and low maternal serum UA levels may be informative in studying maternal blood pressure during pregnancy.

Iodine Intakes of Victorian Schoolchildren Measured Using 24-h Urinary Iodine Excretion

Mandatory fortification of bread with iodized salt was introduced in Australia in 2009, and studies using spot urine collections conducted post fortification indicate that Australian schoolchildren are now replete. However an accurate estimate of daily iodine intake utilizing 24-h urinary iodine excretion (UIE μg/day) has not been reported and compared to the estimated average requirement (EAR). This study aimed to assess daily total iodine intake and status of a sample of primary schoolchildren using 24-h urine samples. Victorian primary school children provided 24-h urine samples between 2011 and 2013, from which urinary iodine concentration (UIC, μg/L) and total iodine excretion (UIE, μg/day) as an estimate of intake was determined. Valid 24-h urine samples were provided by 650 children, mean (SD) age 9.3 (1.8) years (n = 359 boys). The mean UIE of 4–8 and 9–13 year olds was 94 (48) and 111 (57) μg/24-h, respectively, with 29% and 26% having a UIE below the age-specific EAR. The median (IQR) UIC was 124 (83,172) μg/L, with 36% of participants having a UIC < 100 μg/L. This convenience sample of Victorian schoolchildren were found to be iodine replete, based on UIC and estimated iodine intakes derived from 24-h urine collections, confirming the findings of the Australian Health Survey.

Dietetics students' construction of competence through assessment and placement experiences

AIM

Competency standards are widely adopted as a framework to describe standards of performance required in the workplace. Little is known, however, about how students construct competence. This qualitative study aimed to explore how dietetics students ready to graduate construct the concept of competence and the role of assessment in developing professional competence.

METHODS

A qualitative description was used to gather data from a convenience sample of students ready to graduate from universities with accredited dietetics programs across Australia (10 out of 15 at the time of the study). A total of 11 focus groups were conducted to explore perspectives of competence and experiences of 'competency-based' assessment. Data were audio-recorded, transcribed and analysed using a thematic analysis approach.

RESULTS

A total of 81 (n = 81) participants across 10 universities representing 22% of total students participated in the focus groups. Themes revealed that: (i) there is no shared understanding of competence; (ii) current work placement experiences may not reflect current standards or workforce needs; (iii) assessment approaches may not fully support the development of competence; and (iv) the competent performance of supervising dietitians/clinical educators in the workplace influences the construction of competence.

CONCLUSIONS

There is a need to work towards a shared understanding of dietetic entry-level competence in the profession. 'Work-based' learning experiences may need to be modified to ensure students meet current competency standards. Practitioners involved in student supervision need to acknowledge the influential role they have in the development of the future workforce.

The Development of a Web-Based Program to Reduce Dietary Salt Intake in Schoolchildren: Study Protocol

BACKGROUND

Salt intake of schoolchildren in the Australian state of Victoria is high. To protect future cardiovascular health, interventions that seek to reduce the amount of salt in children's diets are required.

OBJECTIVE

We sought to develop and pilot test a Web-based program (Digital Education to Limit Salt Intake in the Home [DELISH]) that aims to reduce dietary salt intake among schoolchildren and to improve child and parent knowledge, attitudes, and behaviors related to salt intake. This paper presents the DELISH study protocol, along with pilot findings used to inform the development of the program.

METHODS

The DELISH program is a 5-week Web-based intervention that targets schoolchildren aged 7-10 years and their parents. This is a single-arm study with a pretest and posttest design. We will assess change in salt intake through analysis of 24-hour urinary sodium excretion. Children and parents will complete online surveys assessing knowledge, attitudes, and behaviors related to salt intake. We will assess feasibility of the program via process measures, which include metrics to describe intervention uptake (eg, number of children who complete Web-based sessions and of parents who view online newsletters) and evaluation surveys and interviews conducted with children, parents, and schoolteachers. The first 2 Web sessions developed for children were pilot tested in 19 children aged 8-12 years.

RESULTS

Findings from pilot testing indicated that most children (session 1: 18/19, 95%; and session 2: 19/19, 100%) enjoyed completing each session and liked the inclusion of comic strips and interactive games. Commonly reported areas of improvement related to sessions being text and content heavy. Based on these findings, we simplified sessions and developed 3 additional sessions for use in the DELISH program. The DELISH program was implemented during June-December 2016. We expect to have results from this study at the end of 2017.

CONCLUSIONS

To our knowledge, this is the first Australian study to examine the effectiveness of a Web-based program to reduce salt intake among children in primary school. If shown to be acceptable and effective in lowering salt intake, the DELISH program could be tested using a more rigorous randomized controlled trial design.

Association of Birth Weight and Current Body Size to Blood Pressure in Female Twins

It has been proposed that low birth weight is associated with high levels of blood pressure in later life. The aim of this study was to assess the relationship of blood pressure to birth weight and current body size during growth and adulthood. A total of 711 female multiple births, with one group of 244 in their growth phase mean age 12.0 (2.3)(SD) years and the other of 467 adults (mean age 35.2 (12.6) years), had height, weight and both systolic (SBP) and diastolic (DBP) blood pressures measured, and self-reported their birth weight. Regression analyses were performed to assess the cross-sectional and within-pair associations of blood pressure to birth weight, with and without adjustments for current body size. Within-pair analysis was based on 296 twin pairs. Cross-sectionally, a reduction in birth weight of 1 kg was associated with 2 to 3 mm Hg higher age-adjusted SBP, which was of marginal significance and explained about 2% of the population variance. Adjustment for body mass index did not significantly change this association. Within-pair analyses found no association between birth weight and SBP or DBP, even after adjusting for current body size. After age, current body size was the strongest predictor of systolic BP. The weak association of blood pressure to birth weight cross-sectionally is of interest, but any within-pair effect of birth weight on blood pressure must be minimal compared with the effect of current body size.

Blood pressure change with weight loss is affected by diet type in men

BACKGROUND

Weight loss reduces blood pressure, and the Dietary Approaches to Stop Hypertension (DASH) diet has also been shown to lower blood pressure.

OBJECTIVE

Our goal was to assess the effect on blood pressure of 2 weight-reduction diets: a low-fat diet (LF diet) and a moderate-sodium, high-potassium, high-calcium, low-fat DASH diet (WELL diet).

DESIGN

After baseline measurements, 63 men were randomly assigned to either the WELL or the LF diet for 12 wk, and both diet groups undertook 0.5 h of moderate physical activity on most days of the week.

RESULTS

Fifty-four men completed the study. Their mean (+/-SD) age was 47.9 +/- 9.3 y (WELL diet, n = 27; LF diet, n = 27), and their mean baseline home systolic and diastolic blood pressures were 129.4 +/- 11.3 and 80.6 +/- 8.6 mm Hg, respectively. Body weight decreased by 4.9 +/- 0.6 kg (+/-SEM) in the WELL group and by 4.6 +/- 0.6 kg in the LF group (P < 0.001 for both). There was a greater decrease in blood pressure in the WELL group than in the LF group [between-group difference (week 12 -baseline) in both SBP (5.5 +/- 1.9 mm Hg; P = 0.006) and DBP (4.4 +/- 1.2 mm Hg; P = 0.001)].

CONCLUSIONS

For a comparable 5-kg weight loss, a diet high in low-fat dairy products, vegetables, and fruit (the WELL diet) resulted in a greater decrease in blood pressure than did the LF diet. This dietary approach to achieving weight reduction may confer an additional benefit in reducing blood pressure in those who are overweight.

The effect of calcium supplementation on bone density in premenarcheal females: a co-twin approach

The age and developmental stage at which calcium supplementation produces the greatest bone effects remain controversial. We tested the hypothesis that calcium supplementation may improve bone accrual in premenarcheal females. Fifty-one pairs of premenarcheal female twins (27 monozygotic and 24 dizygotic; mean +/- sd age, 10.3 +/- 1.5 yr) participated in a randomized, single-blind, placebo-controlled trial with one twin of each pair receiving a 1200-mg calcium carbonate (Caltrate) supplement. Areal bone mineral density (aBMD) was measured at baseline and 6, 12, 18 and 24 months. There were no within-pair differences in height, weight, or calcium intake at baseline. Calcium supplementation was associated (P < 0.05) with increased aBMD compared with placebo, adjusted for age, height, and weight at the following time points from baseline: total hip, 6 months (1.9%), 12 months (1.6%), and 18 months (2.4%); lumbar spine, 12 months (1.0%); femoral neck, 6 months (1.9%). Adjusted total body bone mineral content was higher in the calcium group at 6 months (2.0%), 12 months (2.5%), 18 months (4.6%), and 24 months (3.7%), respectively (all P < 0.001). Calcium supplementation was effective in increasing aBMD at regional sites over the first 12-18 months, but these gains were not maintained to 24 months.

Blood pressure response to dietary modifications in free-living individuals

A diet rich in fruits, vegetables, and low-fat dairy foods has been shown to lower blood pressure (BP) when all foods are provided. We compared the effect on BP (measured at home) of 2 different self-selected diets: a low-sodium, high-potassium diet, rich in fruit and vegetables (LNAHK) and a high-calcium diet rich in low-fat dairy foods (HC) with a moderate-sodium, high-potassium, high-calcium DASH-type diet, high in fruits, vegetables and low-fat dairy foods (OD). Subjects were randomly allocated to 2 test diets for 4 wk, the OD and either LNAHK or HC diet, each preceded by a 2 wk control diet (CD). The changes in BP between the preceding CD period and the test diet period (LNAHK or HC) were compared with the change between the CD and the OD periods. Of the 56 men and 38 women that completed the OD period, 43 completed the LNAHK diet period and 48 the HC diet period. The mean age was 55.6 +/- 9.9 (+/-SD) years. There was a fall in systolic pressure between and the CD and OD [-1.8 +/- 0.5 mm Hg (P < 0.001)]. Compared with OD, systolic and diastolic BPs fell during the LNAHK diet period [-3.5 +/- 1.0 (P < 0.001) and -1.9 +/- 0.7 (P < 0.05) mmHg, respectively] and increased during the HC diet period [+3.1 +/- 0.9 (P < 0.01) and +0.8 +/- 0.6 (P = 0.15) mm Hg, respectively]. A self-selected low-sodium, high-potassium diet resulted in a greater fall in BP than a multifaceted OD, confirming the beneficial effect of dietary intervention on BP in a community setting.

Pregnancy and lactation have no long-term deleterious effect on measures of bone mineral in healthy women: a twin study

BACKGROUND

The long-term effects of pregnancy and lactation on measures of bone mineral in women remain unclear.

OBJECTIVE

We studied whether pregnancy or lactation has deleterious long-term effects on bone mineral in healthy women.

DESIGN

We measured bone mineral density (BMD; g/cm(2)) in women aged > or = 18 y. Analyses were performed on 3 data sets: study 1, 83 female twin pairs (21 monozygous and 62 dizygous) aged (x +/- SD) 42.2 +/- 15.5 y who were discordant for ever having been pregnant beyond 20 wk; study 2, 498 twin pairs aged 42.3 +/- 15.0 y; and study 3, 1354 individual twins, their siblings, and family members.

RESULTS

In study 1, there were no significant within-pair differences in unadjusted BMD or BMD adjusted for age, height, and fat mass at the lumbar spine or total-hip or in total-body bone mineral content (BMC; kg) (paired t tests). In study 2, there was no significant within-pair difference in measures of bone mineral or body composition related to the within-pair difference in number of pregnancies. In study 3, subjects with 1 or 2 (n = 455) and > or = 3 pregnancies (n = 473) had higher adjusted lumbar spine BMD (2.9% and 3.8%, respectively; P = 0.001) and total-body BMC (2.2% and 3.1%; P < 0.001) than did nulliparous women (n = 426). Parous women who breast-fed had higher adjusted total-body BMC (2.6%; P = 0.005), total-hip BMD (3.2%; P = 0.04), and lower fat mass (10.9%; P = 0.01) than did parous non-breast-feeders.

CONCLUSION

We found no long-term detrimental effect of pregnancy or breast-feeding on bone mineral measures.

Hormone replacement therapy and bone mineral density: a co-twin approach

OBJECTIVE

Our objective was to estimate the difference in bone mass at clinically relevant sites within female twin pairs who were discordant for use of hormone replacement therapy (HRT).

METHODS

We studied 46 female twin pairs who were discordant for HRT use. Bone mineral content and density were measured at the lumbar spine, total hip, femoral neck, 13 total forearm, and the total body. HRT use, calcium intake, physical activity, alcohol intake, and lifetime smoking were determined by questionnaire.

RESULTS

Within a pair, lumbar spine bone mineral density was significantly greater in past and current HRT users compared with nonusers (6.2% +/- 2.0%; P = 0.006). In those pairs who were currently using HRT, the within-pair difference in lumbar spine bone density was 7.8% +/- 2.1% (P = 0.002), and a significant within-pair difference in forearm bone density (5.1 +/- 2.1%; P = 0.02) was apparent. A significant difference (4.6%; P = 0.03) was observed in total body bone mineral content when an adjustment was made for age, lean mass, fat mass, and height.

CONCLUSIONS

In keeping with randomized clinical trial findings, these results indicate that HRT in routine clinical use protects significantly against menopausal bone loss at the lumbar spine and the forearm. Our results also quantify the magnitude of the benefit of HRT on bone density that might be anticipated in clinical practice.

Vitamin D intake and vitamin D status of Australians

The main source of vitamin D for Australians is exposure to sunlight. Thus, levels of serum 25-hydroxyvitamin D(3), the indicator of vitamin D status, vary according to the season and are lower at the end of winter. In Australia and New Zealand, the prevalence of vitamin D deficiency varies, but is acknowledged to be much higher than previously thought. One study found marginal deficiency in 23% of women, and another frank deficiency in 80% of dark-skinned and veiled women. The groups at greatest risk of vitamin D deficiency in Australia are dark-skinned and veiled women (particularly in pregnancy), their infants, and older persons living in residential care. Only a few foods (eg, fish with a high fat content) contain significant amounts of vitamin D. In Australia, margarine and some milk and milk products are currently fortified with vitamin D. The average estimated dietary intake of vitamin D for men is 2.6-3.0 g/day and for women is 2.0-2.2 g/day. The estimated dietary requirement of vitamin D is at least 5.0 g/day and may be higher for older people. Adequate intake of vitamin D is unlikely to be achieved through dietary means, particularly in the groups at greatest risk, although vitamin D-fortified foods may assist in maintaining vitamin D status in the general population. An appropriate health message for vitamin D needs to balance the need for sunshine against the risk of skin cancer.