Weekend Days Research Articles

Seasonality and Objective Physical Activity and Sedentary Behaviour among Older Adults from Four European Countries.

The present study aimed to explore the relationship between objective physical activity and sedentary behaviour with seasonality among a sample of older adults living in four European countries. A sample of 169 older adults living in Croatia, Greece, Portugal, and Poland (mean age = 72.2 ± 6.0, 68% female) had valid objective physical activity and sedentary behaviour data collected in different seasons of the year: spring and autumn/winter. Physical activity and sedentary behaviour were collected with accelerometers (ActiGraph, GT3X), over 7 consecutive days, in both periods. A valid record was defined as at least two weekdays and one weekend day with 10 hours of wearing time. Analyses were performed with IBM SPSS 28.0, using t-test, ANOVA, and binary logistic regressions. Most older adults from the four countries met the physical activity guidelines in spring and autumn/winter. No significant variations were found across seasons for sedentary behaviour and physical activity both for light and vigorous intensity, regardless of sex, country, education, and body mass index (BMI). A decline in moderate physical activity intensity from spring to autumn/winter was found for those with lower education and higher BMI. The promotion of physical activity must be considered in programs to promote healthy aging throughout the year, especially considering the moderate intensity and those populations with higher BMI and lower educational levels.

Psychological and Behavioural Within-participant Predictors of Adherence to Oral HIV Pre-Exposure Prophylaxis (PrEP).

Oral PrEP's effectiveness relies on adequate adherence during periods of substantial HIV risk. Since most PrEP users will miss doses, understanding predictors within participants can help to explain adherence. We used a cross-sectional, within-participant design with 67 gay, bisexual, and other men who have sex with men taking PrEP daily. Using a questionnaire, informed by the Information Motivation Behavioral Skills Model, participants were asked about an adherent and a non-adherent episode. PrEP non-adherence was associated with non-normality of the day (p < .001), being out of the home (p < .001), weekend days (p = .01), having company (p = .02), using substances (p = 0.02), not using reminders (p = .03), lower PrEP information (p = .04), lower behavioural skills (p < .001) and less positive affect (p = .002). PrEP adherence assessment could focus on situational variations, supporting the construction of alternative strategies to facilitate adherence in these situations.

Establishing the criterion validity of an adapted dietary screener for Asian Americans amongst Chinese American adults

ObjectiveTo assess the criterion validity of a dietary screener questionnaire adapted for Asian Americans (ADSQ) compared to Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA-24) food diary data amongst Chinese American Adults (CHAs). The ADSQ incorporated example ethnic foods from six Asian American groups. Lessons learned with respect to translating the ADSQ from English into Simplified Chinese were also documented.DesignAgreement between a two-day food diary (one weekend day and one weekday) and the ADSQ was assessed for vegetable, fruit, dairy, added sugar, fiber, calcium, and whole grain intake using paired t-tests to compare means and Spearman correlations to assess agreement between intake of food components.SettingData were collected online and via phone interviews.ParticipantsThirty-three CHAs aged 19–62 years (63.6% female).ResultsMean differences were small for fruit, dairy, fiber, calcium, and whole grain intake, but were significantly different for vegetables and added sugar intake. Spearman correlations were < 0.5 and non-significant (p > 0.05) for all components. Both the ASA-24 and the ADSQ identified the same categories where CHAs intake is misaligned with dietary recommendations: whole grains, total fruit, and dairy. Difficulties were encountered in translating 13 out of 26 questions.ConclusionsThe ADSQ may be a useful tool to identify intervention targets for improving dietary quality, but caution is warranted when interpreting vegetable and added sugar estimates. Differences in the English and Chinese languages underscore the need to take into account both literal translations and semantics in translating the ADSQ into other languages.

Informal caregiving and the allocation of time: implications for opportunity costs and measurement

Informal care requires a considerable time investment from providers that inherently involves trade-offs against various uses of time. We examine what other uses of time are forgone when individuals provide informal care. We further consider how caregiving is linked to a range of rarely explored time use characteristics relating to multitasking, the fragmentation and the timing of activities. We use data from 5670 adults across 11003 diary days from the 2014/15 UK Time Use Survey. Using a ‘doubly robust’ approach of entropy balancing and regression adjustment, we find carers spend an additional 49.0 min on non-market work, 2.9 min on personal care, 5.8 min on leisure and 2.9 min on miscellaneous activities on weekdays. They spend 46.1 min less on market work and 14.4 min less on sleep. Carers report more time stress, more multitasking, and more fragmented time. We estimate with attribution factors that 16% and 11% of reported household task activity is due to caregiving on weekday and weekend days, respectively. These findings provide evidence on additional opportunity costs faced by carers and possible channels through which carer labour market and health outcomes are realised. The attribution factors we calculate can be applied to total reported caregiving time to avoid overestimation when this is incorporated into economic evaluations.

Geospatial Assessment to Improve Time to Treatment (GAITT)

IntroductionGeographic information systems (GIS) can optimize trauma systems by identifying ways to reduce time to treatment. Using GIS, this study analyzed a system in Maryland served by Johns Hopkins Suburban Hospital and the University of Maryland Capital Region Medical Center. It was hypothesized that including Walter Reed National Military Medical Center (WRNMMC) in the Maryland trauma system in an access simulation would provide increased timely access for a portion of the local population. Materials and methodsUsing ArcGIS Online, catchment areas with and without WRNMMC were built. Catchment areas captured Johns Hopkins Suburban Hospital, University of Maryland Capital Region Medical Center, and WRNMMC at 5-, 10-, 15-, 20-, 25-, 30-, 45-, and 60-min. Various time conditions were simulated (12 am, 8 am, 12 pm, and 5 pm) on a weekday and weekend day. Data was enriched with 19 variables addressing population size, socioeconomic status, and diversity. ResultsAll catchment areas benefited on at least one time-day simulation, but the largest increases in mean population coverage were in the 0-5 (10.5%), 5-10 (12.3%), and 10-15 min (5.7%) catchment areas. These areas benefited regardless of time-day simulation. The lowest increase in mean population coverage was seen in the 20-25-min catchment area (0.1%). Subgroup analysis revealed that all socioeconomic status and diversity groups gained coverage. ConclusionsThis study suggests that incorporating WRNMMC into the Maryland trauma system might yield increased population coverage for timely trauma access. If incorporated, WRNMMC may provide nonstop or flexible coverage, possibly in different traffic scenarios or while civilian centers are on diversion status.

Exploring the relationship between social jetlag with gut microbial composition, diet and cardiometabolic health, in the ZOE PREDICT 1 cohort

PurposeIn this study, we explore the relationship between social jetlag (SJL), a parameter of circadian misalignment, and gut microbial composition, diet and cardiometabolic health in the ZOE PREDICT 1 cohort (NCT03479866).MethodsWe assessed demographic, diet, cardiometabolic, stool metagenomics and postprandial metabolic measures (n = 1002). We used self-reported habitual sleep (n = 934) to calculate SJL (difference in mid-sleep time point of ≥ 1.5 h on week versus weekend days). We tested group differences (SJL vs no-SJL) in cardiometabolic markers and diet (ANCOVA) adjusting for sex, age, BMI, ethnicity, and socio-economic status. We performed comparisons of gut microbial composition using machine learning and association analyses on the species level genome bins present in at least 20% of the samples.ResultsThe SJL group (16%, n = 145) had a greater proportion of males (39% vs 25%), shorter sleepers (average sleep < 7 h; 5% vs 3%), and were younger (38.4 ± 11.3y vs 46.8 ± 11.7y) compared to the no-SJL group. SJL was associated with a higher relative abundance of 9 gut bacteria and lower abundance of 8 gut bacteria (q < 0.2 and absolute Cohen’s effect size > 0.2), in part mediated by diet. SJL was associated with unfavourable diet quality (less healthful Plant-based Diet Index), higher intakes of potatoes and sugar-sweetened beverages, and lower intakes of fruits, and nuts, and slightly higher markers of inflammation (GlycA and IL-6) compared with no-SJL (P < 0.05 adjusted for covariates); rendered non-significant after multiple testing adjustments.ConclusionsNovel associations between SJL and a more disadvantageous gut microbiome in a cohort of predominantly adequate sleepers highlight the potential implications of SJL for health.

Combined Effect of Leisure-Time Physical Activity and Sedentary Behavior on Abdominal Obesity in ELSA-Brasil Participants.

Abdominal obesity is a pattern of obesity that has been considered a public health problem. Physical activity is considered an important factor for the prevention of abdominal obesity. Increased time in sedentary behavior has been associated with negative health outcomes, including abdominal obesity. The aim of this study was to investigate which combination of leisure-time physical activity and sedentary behavior contributes most to the prevention of abdominal obesity in adults participating in ELSA-Brasil (Longitudinal Study of Adult Health). The study was cross-sectional and participants from the first follow-up of the ELSA-Brasil cohort (2012-2014) were analyzed. The independent variables were physical activity, assessed by IPAQ, and sedentary behavior, assessed by a standard questionnaire applied in ELSA-Brasil; the dependent variable was abdominal obesity, determined by waist circumference. The covariates analyzed were the following: age, education, binge drinking, smoking and menopause. The associations between the dependent variable and the independent variables were analyzed using logistic regression. The odds ratio with 95 CI% was estimated. For men, the combinations were more significant when they were more physically active and spent less time on the sedentary behaviors analyzed, on both a weekday and a weekend day. For menopausal women, both younger and older, all associations of the combinations between sufficient leisure-time physical activity and little time spent in sedentary behaviors contributed to the prevention of abdominal obesity. In non-menopausal women, positive associations were observed in almost all combinations between leisure-time physical activity and sedentary behaviors, with some results that were not statistically significant among younger women. Our results showed that being sufficiently active and reducing the time spent in sedentary behavior was the combination that contributed the most to the prevention of abdominal obesity, both in men and women.

Effect of treatment interruptions on overall survival in patients with triple-negative breast cancer.

Currently, there are no data regarding the impact of treatment interruptions during radiotherapy for breast cancer. In this study, we examine the correlation between treatment interruptions during radiotherapy and outcomes in triple-negative breast cancer patients. A total of 35 845 patients with triple-negative breast cancer treated between 2010 and 2014 were identified and analyzed from the National Cancer Database. The number of interrupted radiotherapy treatment days was calculated as the difference between the total elapsed days from the start to end of radiation treatment (both initial treatment and boost treatment, when boost was administered) and the total number of expected treatment days, defined as the number of expected treatment days with an addition of 2 weekend days for every multiple of 5 treatment days. Binomial multivariate regression analysis was used to detect correlates of treatment interruptions, and propensity-score matched multivariable Cox proportional hazard models were used to evaluate the association between treatment interruption and overall survival (OS). When modeled as a continuous variable, longer treatment duration was associated with poorer OS (hazard ratio [HR] = 1.023, 95% confidence interval [CI] = 1.015 to 1.031). In reference to 0-1 days of interruption, patients with 2-5 interrupted days (HR = 1.069, 95% CI = 1.002 to 1.140 interrupted days), 6-10 interrupted days (HR = 1.239, 95% CI = 1.140 to 1.348 interrupted days), and 11-15 interrupted days (HR = 1.265, 95% CI = 1.126 to 1.431 interrupted days) experienced increasing likelihood of mortality. In the first study of its kind, we report a correlation between treatment interruptions during adjuvant radiotherapy in triple-negative breast cancer and OS.

P24-044-23 Exploring the Relationship Between Weekday and Weekend Day Temporal Dietary Patterning

P24-044-23 Exploring the Relationship Between Weekday and Weekend Day Temporal Dietary Patterning

Associations Between Type and Timing of Physical Activity and Sedentary Behavior With Mental Health in Adolescents and Young Adults.

This cross-sectional study analyzed the association of leisure-time physical activity (PA) and sedentary behavior (SB), nonleisure PA and SB, and total PA and SB in different time segments of the day with mental health among Dutch adolescents and young adults. A total of 881 participants aged 16-25years completed an online survey. Mental health was assessed using the Mental Health Inventory-5, and participants also reported sex, age, and income. They filled out a questionnaire of types of PA and SB for each hour of the day. Activities were categorized into nonleisure and leisure, during the morning, afternoon, evening, and for the whole day. Participants (52.8% female, on average 20.8y) generally engaged in more leisure-time PA and SB during weekends compared with weekdays, and more nonleisure activities on weekdays. Associations varied between time segments and days of the week. Positive associations of leisure-time and total PA during the whole day and evenings with mental health were observed on weekdays. Total, leisure-time, and nonleisure-time SB were associated with worse mental health. Nonleisure PA was not associated with mental health. Leisure-time PA was found to have a favorable association with mental health, particularly in the evenings of weekdays and afternoons of weekend days. On the other hand, leisure SB was associated with poorer mental health in most of the time segments analyzed, and nonleisure SB in the evenings was also related to worse mental health. The type and timing of PA and SB behaviors play an important role in the relationship with mental health.

Dietary Energy and Nutrient Intake of Healthy Pre-School Children in Hungary.

Diet in the early years of life may influence the development of chronic diseases later on. The aim of the present study was to investigate the dietary intake of 2- to 6-year-old Hungarian children. In 2013 and subsequently in 2016, cross-sectional surveys were conducted among parents of healthy children attending kindergarten in Hungary. We used a three-day food diary to record quantitative data of all the nutrients consumed by the children on two working days and one weekend day. The dietary intakes were compared to both the Hungarian recommended dietary allowances and the European Food Safety Authority recommendations. The nutritional data of altogether 186 children in 2013 and 556 children in 2016 were analyzed. The total energy and carbohydrate intake was appropriate. We observed high sugar intake in every fifth child. Protein, fat and cholesterol intake, as well as the intake of sodium, potassium and phosphorus, were high. The consumption of calcium and vitamin D was low. Water consumption was not satisfying. The present results underline the need for interventions starting early in life in order to ameliorate nutrient intake during childhood, possibly impacting long-term health outcomes.

Observed face mask use outside retail chain stores during the COVID-19 pandemic in two cities in the state of Idaho, USA.

During the COVID-19 pandemic, public health authorities have encouraged the use of face masks to minimize transmission within the community. To assess mask wear during a COVID-19 surge and guide public health response efforts, including public messaging on mask recommendations, we compared observed mask use in the largest city in each of Idaho's 2 most populous counties, both without a current mask mandate. We recorded mask usage by every third person exiting stores of 5 retail chains in Boise and Nampa during November 8-December 5, 2021. Observations were conducted during three time periods (morning, afternoon, and evening) on weekday and weekend days. A multivariable model with city, retail chain, and city-chain interaction was used to assess mask wear differences by city for each chain. Of 3021 observed persons, 22.0% wore masks. In Boise, 31.3% (430/1376) of observed persons wore masks; in Nampa, 14.3% (236/1645) wore masks. Among all persons wearing masks, > 94% wore masks correctly; cloth and surgical masks were most common. By retail chain, observed individuals at Boise locations were 2.3-5.7 times as likely to wear masks than persons at respective Nampa locations. This study provided a rapid, nonconfrontational assessment of public use of mitigation measures in 2 Idaho cities during a COVID-19 surge.

Sedentary and physical activity time differs between self-reported ATLS-2 physical activity questionnaire and accelerometer measurements in adolescents and young adults in the United Arab Emirates

BackgroundMost young adults and adolescents in the United Arab Emirates (UAE) do not meet the established internationally recommended physical activity levels per day. The Arab Teen Lifestyle Study (ATLS) physical activity questionnaire has been recommended for measuring self-reported physical activity of Arab adolescents and young adults (aged 14 years to mid-twenties). The first version of the ATLS has been validated with accelerometers and pedometers (r ≤ 0.30). The revised version of the questionnaire (ATLS-2, 2021) needs further validation. The aim of this study was to validate the self-reported subjective sedentary and physical activity time of the ATLS-2 (revised version) physical activity questionnaire with that of Fibion accelerometer-measured data.MethodsIn this cross-sectional study, 131 healthy adolescents and young adults (aged 20.47 ± 2.16 [mean ± SD] years (range 14–25 years), body mass index 23.09 ± 4.45 (kg/m2) completed the ATLS-2 and wore the Fibion accelerometer for a maximum of 7 days. Participants (n = 131; 81% non-UAE Arabs (n = 106), 13% Asians (n = 17) and 6% Emiratis (n = 8)) with valid ATLS-2 data without missing scores and Fibion data of minimum 10 h/day for at least 3 weekdays and 1 weekend day were analyzed. Concurrent validity between the two methods was assessed by the Spearman rho correlation and Bland-Altman plots.ResultsThe questionnaire underestimated sedentary and physical activity time compared to the accelerometer data. Only negligible to weak correlations (r ≤ 0.12; p > 0.05) were found for sitting, walking, cycling, moderate intensity activity, high intensity activity and total activity time. In addition, a proportional/systematic bias was evident in the plots for all but two (walking and moderate intensity activity time) of the outcome measures of interest.ConclusionsOverall, self-reported ATLS-2 sedentary and physical activity time had low correlation and agreement with objective Fibion accelerometer measurements in adolescents and young adults in the UAE. Therefore, sedentary and physical activity assessment for these groups should not be limited to self-reported measures.

The Relationship Between Screen Time and Symptom Severity in Children with ADHD during COVID-19 Lockdown

Objectives: To investigate the relationship between screen time and symptom severity in children with ADHD during the COVID-19 lockdown. Methods: Caregivers of children with ADHD aged 7 to 16 years completed the screen time questionnaire and ADHD rating scales of the SNAP-IV-Thai version during and after the COVID-19 lockdown. The correlation between screen time and ADHD scores was assessed. Results: Of the 90 children, aged 11.31 ± 2.29 years, enrolled, 74.4% were male, 64.4% were in primary school, and 73% had electronic screens in their bedrooms. After adjusting with other factors, recreational screen time, both on weekdays and on weekend days, were positively correlated with ADHD scores (both inattention and hyperactive/impulsive scores). Studying screen time, on the other hand, was not associated with ADHD symptom severity. Compared to during the lockdown, studying screen time decreased after the lockdown, but recreational screen time and ADHD scores were not changed. Conclusion: Increasing recreational screen time was associated with worsening ADHD symptoms.

Physical Activity in Youth with Down Syndrome and Its Relationship with Adiposity.

The aims of this study are to (1) compare physical activity (PA) and sedentary activity (SA) in youth with and without Down syndrome (DS and non-DS) and examine the relationships of PA and SA with their traditional risk factors (age, sex, race, and body mass index Z score [BMI-Z]) and (2) explore the relationship of PA with visceral fat (VFAT) in both groups. SenseWear accelerometry data from at least 2 weekdays and 1 weekend day were collected from youth with DS (N = 77) and non-DS (N = 57) youth. VFAT was measured by dual x-ray absorptiometry. In age-, sex-, race-, and BMI-Z-adjusted models, those with DS engaged in more minutes of light PA (LPA) ( p < 0.0001) and less SA ( p = 0.003) and trended toward fewer minutes of moderate-to-vigorous PA (MVPA) ( p = 0.08) than non-DS youth. No race or sex differences in MVPA were detected in those with DS, unlike non-DS. After additional adjustment for pubertal status, the relationship between MVPA and VFAT approached significance ( p = 0.06), whereas the relationships of LPA and SA with VFAT were maintained ( p ≤ 0.0001 for both). Youth with DS engage in more LPA compared with non-DS, which, in typically developing populations, can confer a more favorable weight status. Increasing the opportunity for youth with DS to engage in LPA as part of their activities of daily living may offer a viable strategy for achieving healthy weight when barriers restrict pursuit of more vigorous PA.

A 24-h activity profile and adiposity among children and adolescents: Does the difference between school and weekend days matter?

Twenty-four-hour movement behaviours are gaining attention in the research community. However, no study has addressed how 24-h activity profiles vary between structured and less structured days and whether an unfavourable activity profile is associated with childhood obesity. We aimed to analyse differences between school day and weekend day 24-h activity profiles and their associations with adiposity indicators among children and adolescents. Participants were 382 children and 338 adolescents who wore wrist accelerometers for 24 hours a day for seven consecutive days. The 24-h activity profile expressed by the average acceleration (AvAcc) and intensity gradient (IG) were estimated from multi-day raw accelerometer data. Adiposity indicators included body mass index (BMI) z-score, fat mass percentage (FM%), fat mass index (FMI), and visceral adipose tissue (VAT). Multiple linear regression of activity profile metrics and adiposity indicators was performed separately for school and weekend days. Weekend days AvAcc and IG were lower compared to school days in both age groups (p <0.001 for all). Specifically, AvAcc was lower by 9.4% and 11.3% in children and adolescents, respectively. IG on weekend days was lower (more negative) by 3.4% in children and 3.1% in adolescents. Among children, on school days AvAcc and IG were negatively associated with FM%, FMI, and VAT, whilst on weekend days AvAcc was positively associated with BMI z-score, FMI, and VAT (p < 0.05 for all). Among adolescents, negative associations were found between weekend day AvAcc and IG and FM% and FMI (p < 0.05 for all), respectively. This study confirms the importance of 24-h activity profile as a potentially protective factor against excess adiposity. The variability of movement behaviours during structured and less structured days should be considered when optimizing the 24-h movement behaviours to prevent childhood obesity.

Child temperament is associated with energy intake and its day-to-day variability among preschoolers-Results from a cross-sectional DAGIS study.

Although research has linked children's temperament with weight outcomes, the associations between temperament and dietary outcomes, particularly energy intake, remain understudied. Furthermore, little is known about how temperament is associated with diet in the early childhood education and care (ECEC) context, which is an important environment for many children. This study examined whether temperament is associated with mean energy intake and its day-to-day variability. In addition, the associations were examined separately in the contexts of home and ECEC. The study used data from 505 Finnish children from a cross-sectional DAGIS study conducted in 2015-2016. Parents reported their child's temperament with a questionnaire and food consumption with a food record for two weekdays (outside daycare hours) and one weekend day. Early educators at an ECEC centre reported the child's food consumption during the daycare hours on the same weekdays as the parents kept food records at home. Associations were examined with linear regression models. Children with higher surgency had a higher mean daily energy intake. When examined separately at home and in the ECEC centre, the association was found only in the ECEC centre. Children with higher negative affectivity had greater day-to-day variability in energy intake. This association, however, was not observed when examined separately at home and at the ECEC centre. The results indicate that temperament may shape children's energy intake. Moreover, the role of the ECEC context in children's eating may be different depending on a child's temperamental dispositions, which warrants further research.

SPATIAL DISTRIBUTION OF ATMOSPHERIC POLLUTION IN DUHOK URBAN AREA BY USING GIS TOOLS

Air pollution is becoming a serious challenge in thickly populated areas in the world. The air pollution in Kurdistan region is clearly noticed, especially in areas where pollution sources and human population are concentrated. Urbanization and economic growth are proceeding at a rapid pace, accompanied by increasing emissions of a mixture of greenhouse gases especially from transporting sector, that positively contribute to accelerate climate change around the globe, and also have impacts on public health and vegetation. In order to decrease the effects that caused by atmospheric pollution, suitable monitoring systems are urgently needed that can rapidly and reliably detect and quantify polluting sources and concentration for monitoring by local authorities in order to restrain more damage of the current pollution levels. In this study, GIS with portable gas detector (K-60 IV) KELISAIKE safety equipment, China, have been used to assess the status of NOx, VOCs and noise pollution at 54 randomly selected urban locations of Duhok city. The measurements were taken during the week and weekend days started from 9 am until 4 pm. The results showed that there is a variation in the values of the three variables NOx, VOCs and noise, where the highest values recorded during working days in the locations distributed along the highway and the city center with heavy traffic load and dense human population in comparison to lowest values obtained during weekend days in locations distributed outskirt of the city with lower population and traffic loads. Therefore, likely such connections exist between the urban traffic density and low air pollution quality within urban locations around Duhok city.

Digital food and beverage marketing appealing to children and adolescents: An emerging challenge in Mexico.

Digital food marketing is increasing and has an impact on children's behaviour. Limited research has been performed in Latin America. To determine the extent and nature of Mexican children's and adolescents' exposure to digital food and beverage marketing during recreational internet use. A crowdsourcing strategy was used to recruit 347 participants during the COVID-19 lockdown. Participants completed a survey and recorded 45 minutes of their device's screen time using screen-capture software. Food marketing was identified and nutrition information for each marketed product was collected. Healthfulness of products was determined using the Pan-American Health Organization and the Mexican Nutrient Profile Model (NPM). A content analysis was undertaken to assess marketing techniques. Overall, 69.5% of children and adolescents were exposed to digital food marketing. Most frequently marketed foods were ready-made foods. Children and adolescents would typically see a median of 2.7 food marketing exposures per hour, 8 daily exposures during a weekday and 6.7 during a weekend day. We estimated 47.3 food marketing exposures per week (2461 per year). The most used marketing technique was brand characters. Marketing was appealing to children and adolescents yet most of the products were not permitted for marketing to children according to the NPMs (>90%). Mexican children and adolescents were exposed to unhealthy digital food marketing. The Government should enforce evidence-based mandatory regulations on digital media.

Optimizing internal biosecurity on pig farms by assessing movements of farm staff

For internal biosecurity, it is important to separate different age groups in a pig farm and to stick to specific working lines when visiting the barns. Currently, there is no research on the movements of farm staff on pig farms. The objectives of this observational study were to assess movements of farm staff on pig farms, to assess risky movements and to investigate whether movements differ according to time (week of the batch farrowing system (BFS) and weekday vs. weekend) and unit (farrowing, gestation/insemination, nursery, and fattening unit). Five commercial sow farms participated and on each farm, an internal movement monitoring system was installed. Detection points were installed throughout the farm and workers had to wear a personal beacon. Movement data were collected from 1 December 2019 until 30 November 2020. The following sequence of movements was considered as safe: (1) dressing room, (2) farrowing, (3) gestation/insemination, (4) nursery, (5) fattening, (6) quarantine, and (7) cadaver storage. Movements in the opposite direction were considered as risk, unless a dressing room was visited in between. The total number of movements differed according to week of the BFS, and was highest in insemination and farrowing week. The percentage of risky movements was influenced by week of the BFS for two farms, and was highest around weaning. The percentage of risky movements varied between farms and ranged from 9 to 38%. There were more movements on a weekday compared to a weekend day. There were more movements towards the farrowing and gestation/insemination unit in insemination and farrowing week compared to other weeks of the BFS, but week of the BFS had no impact on movements towards nursery and fattening unit. This study showed that there were a lot of (risky) movements on pig farms and that these movements varied according to week of the BFS, day of the week, and unit. This study creates awareness, which could be a first step in optimizing working lines. Future research should focus on why certain risky movements occur and how these can be avoided to achieve better biosecurity and higher health status on farms.