Smartphone survey data reveal the timecourse of changes in mood outcomes following vitamin C or kiwifruit intervention in adults with low vitamin C.

Vitamin C-rich foods can improve mood; however, the timecourse of these benefits is unknown. This study utilised intensive longitudinal smartphone surveys from a three-armed placebo-controlled trial to determine mood-related changes following supplementation with vitamin C (250 mg tablet/d), kiwifruit (2 SunGold™ kiwifruit/d) or a placebo (1 tablet/d). Secondary data were analysed from the KiwiC for Vitality trial (Trial ID: ACTRN12617001031358). Adults (n 155, 63 % female, aged 18-35 years) with low plasma vitamin C (<40 µmol/l) completed a 14-d lead-in, 28-d intervention and 14-d washout. Participants self-reported vitality (SF-36), mood (POMS total mood disturbance), flourishing (flourishing scale), sleep quality, sleep quantity and physical activity every second day using smartphone surveys. Plasma vitamin C, measured fortnightly, reached saturation after 2 weeks of vitamin C or kiwifruit supplementation. Kiwifruit supplementation improved vitality and mood within 4 days, peaking around 14-16 days, and improved flourishing from day 14. Vitamin C marginally improved mood until day 12. Incremental AUC analyses revealed significant overall effects of kiwifruit consumption on vitality and mood compared with placebo, which were stronger than effects for vitamin C tablets, but attenuated when adjusting for covariates. Sensitivity analyses of participants with low baseline vitamin C status revealed improved mood (vitamin C and kiwifruit) and flourishing (kiwifruit only). This is the first study to use intensive smartphone surveys to model the day-to-day timecourse of mood-related states following vitamin C intervention and highlights the value of using smartphone surveys to reveal the temporal changes in mood-related outcomes following nutrient supplementation.

Who gives a veg? Relations between personality and Vegetarianism/Veganism.

With rates of vegetarianism and veganism (i.e., veg*nism) rising around the world, a growing body of research has begun to explore psychological characteristics that distinguish vegetarians and vegans from omnivores. However, relatively few studies have examined how veg*nism is related to differences in basic personality traits such as the "Big Five", with those that have tending to yield conflicting results. Moreover, none of these studies have examined personality at the lower levels of the personality trait hierarchy (i.e., aspects and facets of the Big Five). Thus, we sought to clarify how personality traits are related to veg*nism. In Study 1, comprising two samples (S1a: N = 797, S1b: N = 1534), participants were categorised as Veg*n vs Restricted-omnivore vs Omnivore, and completed personality questionnaires at the domain and aspect levels of the Big Five. In Study 2, participants (N = 562) completed both categorical and continuous measures of veg*nism, along with personality questionnaires at the domain, aspect, and facet levels. Across both studies, we found that people who scored higher on traits within the openness/intellect and agreeableness domains most consistently reported higher levels of veg*nism. Patterns in the data also suggested that the relation between personality and veg*nism might depend on the way veg*nism is measured. Theoretical and practical implications of these findings are discussed.

An Exploration of Smoking-to-Vaping Transition Attempts Using a "Smart" Electronic Nicotine Delivery System.

INTRODUCTION: Electronic nicotine delivery systems (ENDS) are used to aid smoking cessation attempts; however, many smokers continue to smoke while using an ENDS (dual use). Although uncertainty remains regarding whether specific ENDS patterns hinder or support successful smoking cessation, recent advances in "smart" technology allow passive and active recording of behaviors in real time, enabling more detailed insights into how smoking and vaping patterns may coevolve. We describe patterns of ENDS initiation, and subsequent use, including any changes in cigarette consumption, among daily smokers using a "smart" ENDS (S-ENDS) to quit smoking. METHOD: An 8-week long mixed-methods feasibility study used Bluetooth-enabled S-ENDS that passively recorded real-time device use by participants (n = 11). Daily surveys administered via smartphones collected data on self-reported cigarette consumption. RESULTS: All 11 participants were dual users, at least initially, during their quit attempt. We observed three provisional vaping and smoking patterns: immediate and intensive ENDS initiation coupled with immediate, dramatic, and sustained smoking reduction, leading to smoking abstinence; gradual ENDS uptake with gradual smoking reductions, leading to daily dual use throughout the study period; and ENDS experimentation with return to exclusive smoking. For six participants, the patterns observed in week 1 were similar to the vaping and smoking patterns observed throughout the rest of the study period. CONCLUSION: Technological advances now allow fine-grained description of ENDS use and smoking patterns. Larger and longer studies describing smoking-to-vaping patterns, and estimating associations with smoking outcomes, could inform ENDS-specific cessation advice promoting full transition from smoking to exclusive ENDS use. IMPLICATIONS: The use of an S-ENDS that recorded real-time device use among daily smokers engaged in a quit attempt provides insight into patterns and trajectories of dual use (continuing to smoke while using ENDS), and the possible associations between ENDS initiation, subsequent use, and smoking cessation outcomes. Such work could support more targeted cessation counseling and technical advice for smokers using ENDS to quit smoking, reduce the risk of users developing long-term dual use patterns, and enhance the contributions ENDS may make to reducing smoking prevalence.

Just a First-Year Thing? The Relations between Drinking During Orientation Week and Subsequent Academic Year Drinking Across Class Years.

BACKGROUND: The goal of Orientation Week is to help new students adjust to university life. However, it is a period when many new students engage in excessive alcohol consumption and where problematic drinking patterns may be established. OBJECTIVE: The objective is to determine whether returning students drink in a similar manner to students in their first-year of classes and whether Orientation Week drinking predicts semester drinking more strongly for first-year than returning students. METHODS: We tested 552 students (18 to 25 years old) in their first, second, or third class year of university. Students reported their Orientation Week drinking and then completed daily drinking diaries for 13 consecutive days during the academic year. RESULTS: Orientation Week drinking was similar across class years and also predicted academic year drinking for students in all class years. Conclusion/Importance: Drinking during Orientation Week is not just a first-year problem and prevention efforts should focus on all students.

The development and effectiveness of an ecological momentary intervention to increase daily fruit and vegetable consumption in low-consuming young adults.

OBJECTIVES: To develop and test the effectiveness of a mobile-phone based ecological momentary intervention (EMI) to increase fruit and vegetable (FV) consumption in low-consuming young adults. METHODS: A two-week randomised controlled trial of low-FV consuming young adults ages 18-25 years (n = 171) compared three conditions: ecological momentary intervention (EMI), fruit and vegetable intervention (FVI), and a diet-as-usual control (ANZCTRN12615000183583). Participants in the EMI condition were sent two targeted text messages a day for 13 days and were asked to increase daily FV consumption to at least five servings. These messages were designed, using the Health Action Process Approach, to address salient beliefs identified as effective in a preliminary focus group investigation. Participants in the FVI condition were provided two servings of FV a day (carrots, kiwifruit or oranges, and apples) to eat in addition to their current diet. Control participants ate their normal diet. Participants reported their daily servings of FV each evening during the study using a smartphone-delivered survey. Blood samples testing plasma vitamin C and total carotenoids were taken pre- and post-intervention as an objective biomarker of FV intake. RESULTS: Participants in the EMI and FVI conditions reported higher daily servings of FV - approximately +1 serving per day more compared to control (EMI = 3.7 servings/day; FVI = 3.7 servings/day; Control = 2.8 servings/day) and approximately +1.2 servings compared to baseline. Increases in objective biomarkers for the experimental conditions supported the validity of self-reported FV consumption. CONCLUSIONS: Our results provide initial proof of concept that EMI strategies (with minor financial assistance) are as effective as giving FV in increasing FV consumption in educated, low-consuming young adults.

Optimal serum selenium concentrations are associated with lower depressive symptoms and negative mood among young adults.

BACKGROUND: There is evidence that low, and possibly high, selenium status is associated with depressed mood. More evidence is needed to determine whether this pattern occurs in young adults with a wide range of serum concentrations of selenium. OBJECTIVE: The aim of this study was to determine if serum selenium concentration is associated with depressive symptoms and daily mood states in young adults. METHODS: A total of 978 young adults (aged 17-25 y) completed the Center for Epidemiological Studies-Depression scale and reported their negative and positive mood daily for 13 d using an Internet diary. Serum selenium concentration was determined by inductively coupled plasma mass spectrometry. ANCOVA and regression models tested the linear and curvilinear associations between decile of serum selenium concentration and mood outcomes, controlling for age, gender, ethnicity, BMI, and weekly alcohol intake. Smoking and childhood socioeconomic status were further controlled in a subset of participants. RESULTS: The mean ± SD serum selenium concentration was 82 ± 18 µg/L and ranged from 49 to 450 µg/L. Participants with the lowest serum selenium concentration (62 ± 4 µg/L; decile 1) and, to a lesser extent, those with the highest serum selenium concentration (110 ± 38 µg/L; decile 10) had significantly greater adjusted depressive symptoms than did participants with midrange serum selenium concentrations (82 ± 1 to 85 ± 1 µg/L; deciles 6 and 7). Depressive symptomatology was lowest at a selenium concentration of ∼85 µg/L. Patterns for negative mood were similar but more U-shaped. Positive mood showed an inverse U-shaped association with selenium, but this pattern was less consistent than depressive symptoms or negative mood. CONCLUSIONS: In young adults, an optimal range of serum selenium between ∼82 and 85 µg/L was associated with reduced risk of depressive symptomatology. This range approximates the values at which glutathione peroxidase is maximal, suggesting that future research should investigate antioxidant pathways linking selenium to mood. This trial was registered with the Australian New Zealand Clinical Trials Registry as ACTRN12613000773730.

Positive affect and self-control: attention to self-control demands mediates the influence of positive affect on consecutive self-control.

Positive affect (PA) can either improve or impair self-control performance, depending on whether two tasks are dissimilar, and thus require flexible releasing and switching, or similar, which requires stable maintenance. The present study suggests that this effect is mediated by attentional shifts. The authors found that participants under PA, who performed on two dissimilar tasks and had to switch to a new response dimension, were less attentive to distracting information compared to neutral affect (NE), leading to better performance. In contrast, participants under PA who did not have to switch, were more attentive to distracting information compared to participants under NE. These findings highlight the opposite effects of PA on consecutive self-control.

Understanding the Needs of Food-Allergic Adults.

Food allergies are a growing issue, yet society's understanding of how individuals' lives are affected is limited. We conducted four focus groups with food-allergic adults in New Zealand to gain an in-depth understanding of the issues that impacted their quality of life. Key themes identified included allergen-free eating issues, health care system issues, costs of having a food allergy, effects on well-being, external influences (e.g., others' lack of awareness), and internal influences (personal growth and adaptation). The unmet needs of food-allergic adults led to risk taking, increased stress, and social isolation. A lack of awareness in others (including medical professionals, food service providers, and the general public) had a negative impact, suggesting that an intervention targeting awareness would be beneficial. Adaptation, particularly in terms of assertiveness and organizational skills, was important for coping, so we suggest training in these skills be made available for food-allergic patients.

Psychological predictors of vaping uptake among non-smokers: A longitudinal investigation of New Zealand adults.

INTRODUCTION: Demographic and health factors are known to predict vaping. Less is known about psychological predictors of vaping uptake, particularly among non-smoking adults using longitudinal designs. We aimed to model how psychological factors related to personality and mental health predicted the likelihood of vaping uptake over time in non-smoking adults ages 18+ using longitudinal data. METHODS: Longitudinal regression models utilised data from the 2018-2020 waves of the New Zealand Attitudes and Values Study to assess how the Big Five personality traits, mental distress and self-control predicted who began vaping over time among non-users (non-vapers and non-smokers), controlling for gender, age, ethnicity and economic deprivation. RESULTS: Analyses included 36,309 adults overall (ages 18 to 99; M = 51.0). The number of non-users who transitioned into current vaping was small (transitioned from 2018 to 2019, n = 147; 0.48%; 2019 to 2020, n = 189, 0.63%). Fully adjusted models showed that adults with higher mental distress (adjusted odds ratio [aOR] 1.43; 95% confidence interval [CI] 1.09-1.88), lower self-control (aOR 0.79; 95% CI 0.69-0.89) and higher extraversion (aOR 1.09; 95% CI 1.06-1.13) were more likely to begin vaping at the next time point compared to adults who remained non-users. Higher neuroticism and lower conscientiousness also predicted vaping uptake in initial models, but inclusion of mental distress and self-control superseded these traits. DISCUSSION AND CONCLUSIONS: Psychological factors related to mental distress, impulse control and sociability predicted who was more likely to begin vaping as non-smoking adults. Harm prevention interventions could target these factors to reduce vaping uptake in non-smokers.

University students' opinions towards mobile sensing data collection: A qualitative analysis.

mHealth researchers can now collect a wealth of data using "life tracking apps" (LTAs), which are smartphone applications that use mobile sensing to capture and summarise a multitude of data channels (e.g., location, movement, keyword use, sleep, exercise, and so on). The combined wealth of information can create digital signatures of individuals, which hold immense promise for mental health research and interventions by allowing new insights into moment-to-moment changes in behaviour and mental states. However, little is known about what a common research demographic (university students) thinks about these apps and what might factor into their decisions to participate in research using a LTA. This qualitative study ran five focus group sessions (21 students in total) to explore students' experiences, beliefs, and opinions about LTAs to generate insights into what would make them more or less likely to participate in research involving LTAs. Transcripts were coded and examined for categories using qualitative content analysis. Important categories that emerged were privacy (although this varied based on the individual and data being collected), data security, inconvenience, intrusiveness, financial compensation, and the perceived nature of the research team responsible. On the basis of these categories, we derived seven key insights to increase student participation in research using LTAs: strengthen and communicate privacy and data security, design the app to be as convenient as possible to users, maximise passive data collection, think cautiously before tracking data perceived as "creepy" such as messages, offer suitable financial compensation, be transparent about goals and justification for data being collection to build trust, and attract participants by highlighting how the app can help them achieve their goals. With these insights, mHealth researchers can maximise their participant pool and improve this nascent and promising field.

Effects of vaping on uptake and cessation of smoking: Longitudinal analysis in Aotearoa New Zealand adults.

INTRODUCTION: Globally, the use of vapes, or e-cigarettes, is increasing. While vaping is less harmful than smoking and may help smokers to quit, there is also the possibility that vaping may lead to smoking. The current study aimed to determine the prevalence of vaping and smoking in Aotearoa New Zealand and explore longitudinal pathways between smoking status and vape use. METHOD: Data related to smoking and vaping status was analysed from Times 10, 11 and 12 across 2018-2020 of the New Zealand Attitudes and Values study, a large, representative, multi-wave study of adults living in New Zealand. Weighted descriptive analyses were used to determine prevalence rates of vaping and smoking and a generalised linear modelling approach was used to examine the likelihood of changing to, or taking up, the other behaviour in the transition between time points. RESULTS: Broadly, the prevalence of smoking was found to be decreasing over time while the prevalence of vaping was increasing. Despite these general trends, no differences were observed in the likelihood of transitioning from smoking to vaping or from vaping to smoking, indicating that either pathway was equally as likely. DISCUSSION AND CONCLUSIONS: The current findings demonstrate that vaping appeared to be just as likely to have a gateway effect to smoking as it was to have a cessation effect. This highlights the need for greater consideration regarding vaping-related policies and restrictions.

Adherence and eating experiences differ between participants following a flexitarian diet including red meat or a vegetarian diet including plant-based meat alternatives: findings from a 10-week randomised dietary intervention trial.

Background: Flexitarian, vegetarian and exclusively plant-based diets are increasingly popular, particularly amongst young adults. This is the first randomised dietary intervention to investigate the health, wellbeing, and behavioural implications of consuming a basal vegetarian diet that additionally includes low-to-moderate amounts of red meat (flexitarian) compared to one containing plant-based meat alternatives (PBMAs, vegetarian) in young adults (ClinicalTrials.gov NCT04869163). The objective for the current analysis is to measure adherence to the intervention, nutrition behaviours, and participants' experience with their allocated dietary group. Methods: Eighty healthy young adults participated in this 10-week dietary intervention as household pairs. Household pairs were randomised to receive either approximately three serves of red meat (average of 390 g cooked weight per individual, flexitarian group) or PBMAs (350-400 g per individual, vegetarian group) per week on top of a basal vegetarian diet. Participants were supported to adopt healthy eating behaviours, and this intervention was developed and implemented using a behaviour change framework. Adherence (eating allocated red meat or PBMA, abstaining from animal-based foods not provided by researchers) was continuously monitored, with total scores calculated at the end of the 10-week intervention period. Eating experiences were measured by the Positive Eating Scale and a purpose-designed exit survey, and a food frequency questionnaire measured dietary intake. Analyses used mixed effects modeling taking household clustering into account. Results: The total average adherence score was 91.5 (SD = 9.0) out of a possible 100, with participants in the flexitarian group scoring higher (96.1, SD = 4.6, compared to 86.7, SD = 10.0; p < 0.001). Those receiving red meat were generally more satisfied with this allocation compared to those receiving the PBMAs, even though a leading motivation for participants joining the study was an opportunity to try plant-based eating (35% expressed that their interest in taking part was related to trying plant-based eating). Participants in both intervention groups had increased vegetable intake (p < 0.001), and reported more positive eating experiences (p = 0.020) and satisfaction with eating (p = 0.021) at the end of the 10-week intervention relative to baseline values. Conclusion: Methods to encourage engagement with the trial were successful, as participants demonstrated excellent adherence to the intervention. Observed differences in participants' adherence and experiences between flexitarian and vegetarian groups holds implications for the adoption of healthy, sustainable dietary patterns beyond this study alone.

A combined web based intervention and ecological momentary intervention for reducing alcohol use among incoming first-year university students: Results from a three-arm randomised controlled trial.

BACKGROUND: The transition from high school to university is associated with increased alcohol use and harm. Web-based interventions (WBIs) and ecological momentary interventions (EMIs) are two methods that have had some success in reducing alcohol use among university students and may be particularly effective if implemented during the transition to university. The aim of the current study was to investigate the effectiveness of a combined WBI and EMI to reduce alcohol use among incoming university students. METHODS: Incoming first-year students (n = 783, in 2018 and 2019) were randomized into either a WBI + EMI, WBI-only, or an assessment-only condition. All participants completed online questionnaires before university, after their first and second semester, and reported their alcohol use fortnightly throughout their first year. Those in the WBI + EMI and WBI conditions received online feedback about their drinking (i.e., the WBI) immediately following the pre-university survey. Those in the WBI + EMI were also sent eight EMI messages to their mobile phones during Orientation Week and six EMI messages across the academic year aimed at reducing alcohol harm. RESULTS: There were no significant differences between the conditions in Orientation Week drinking, academic year drinking (both "typical" semester or fortnightly drinking), or alcohol-related harms. CONCLUSION: A WBI + EMI intervention aimed at the transition to university did not reduce university students' alcohol use. The transition, however, continues to be a period of serious harm where students drink more than any other period.

The role of impulsivity in the relationship between affect and alcohol consumption in young adults.

BACKGROUND: Theoretical models of alcohol use posit that individuals consume alcohol to ameliorate negative affect or to heighten positive affect. It is important, however, to consider the influence of factors that may determine an individual's tendency to consume excessive amounts of alcohol under positive and negative circumstances. Thus, the current study examined a large sample of young adults to clarify whether positive and negative affect predict total alcohol consumption on drinking days and whether facets of impulsivity moderate these relationships. METHODS: Six-hundred ninety-three young adults (Mage = 19.71 years, SD = 2.04; female = 62.9%) completed the Behavioral Inhibition System/Behavioral Activation System (BIS/BAS) scales at baseline followed by daily measures of positive and negative affect and self-reported alcohol use for 13 days. Generalized linear mixed models were specified to assess the role of pre-consumption affect on total drinks consumed across drinking days and to determine the moderating effect of each BIS/BAS subscale. RESULTS: Participants were significantly more likely to drink in greater quantities on occasions preceded by higher positive affect but not negative affect. While fun-seeking positively predicted total drinks consumed, there were no significant interaction effects between the BIS/BAS subscales and affect on total drinks consumed. CONCLUSIONS: These findings challenge existing affect regulation models and have implications for ecological momentary interventions aimed at addressing hazardous drinking behaviors.

Trends in ambulatory self-report: the role of momentary experience in psychosomatic medicine.

In this article, we review the differences between momentary, retrospective, and trait self-report techniques and discuss the unique role that ambulatory reports of momentary experience play in psychosomatic medicine. After a brief historical review of self-report techniques, we discuss the latest perspective that links ambulatory self-reports to a qualitatively different conscious self-the "experiencing self"--which is functionally and neuroanatomically different from the "remembering" and "believing" selves measured through retrospective and trait questionnaires. The experiencing self functions to navigate current environments and is relatively more tied to the salience network and corporeal information from the body that regulates autonomic processes. As evidence, we review research showing that experiences measured through ambulatory assessment have stronger associations with cardiovascular reactivity, cortisol response, immune system function, and threat/reward biomarkers compared with memories or beliefs. By contrast, memories and beliefs play important roles in decision making and long-term planning, but they are less tied to bodily processes and more tied to default/long-term memory networks, which minimizes their sensitivity for certain research questions. We conclude with specific recommendations for using self-report questionnaires in psychosomatic medicine and suggest that intensive ambulatory assessment of experiences may provide greater sensitivity for connecting psychological with biologic processes.

Corrigendum: Psychological and Demographic Predictors of Vaping and Vaping Susceptibility in Young Adults.

[This corrects the article DOI: 10.3389/fpsyg.2021.659206.].

Reply to Vorland et al. Mixed Random and Nonrandom Allocation, and Group Randomization Have Been Mislabeled and Misanalysed, Necessitating Reanalysis. Comment on "Conner et al. KiwiC for Vitality: Results of a Randomized Placebo-Controlled Trial Testing the Effects of Kiwifruit or Vitamin C Tablets on Vitality in Adults with Low Vitamin C Levels. Nutrients 2020, 12, 2898".

We have read the Comment article by Vorland et al. [...].

Correction: Conner et al. KiwiC for Vitality: Results of a Placebo-Controlled Trial Testing the Effects of Kiwifruit or Vitamin C Tablets on Vitality in Adults with Low Vitamin C Levels. Nutrients 2020, 12, 2898.

In the original publication title [...].

Does the Fear of Missing Out Moderate the Relationship Between Social Networking Use and Affect? A Daily Diary Study.

Social networking site (SNS) use is common and speculation about the negative impact of SNS use on mental health and psychological well-being is a recurring theme in scientific debates. The evidence for this link, however, is inconclusive. The Fear of Missing Out (FoMO) may assist in understanding the mixed evidence, as individuals who experience FoMO are more driven to keep up with what is happening to avoid missing out. We used a 2-week daily diary study of 408 university students to measure the daily associations between SNS use and negative and positive affect and whether FoMO moderated these associations. Multi-level Bayesian regression analyses revealed that 1) greater SNS use was associated with reductions in successive positive affect, but not increases in negative affect and 2) FoMO moderated the influence of SNS use such that increases in successive negative affect occurred only in those individuals high in trait FoMO.

Daily experiences of hangover severity and food consumption in young adults.

OBJECTIVES: Our aim was to determine whether alcohol hangover is associated with eating unhealthy foods (hot chips, soft drink) or healthy foods (fruit, vegetables). DESIGN: Daily diary study across 13 days (micro-longitudinal design). METHODS: We examined a sample of 605 young adults (71% women; ages 17-25; mean age 19.91 [SD 1.86] years) who completed daily diaries in the university community and reported drinking alcohol at least twice during the 13-day study period. Each day, participants reported on their hangover severity, their consumption of fruit, vegetables, hot chips (French fries), and soft drink, and their alcohol consumption from the previous day. Linear mixed models were used to examine within-person associations between hangover severity and food consumption, by gender. Exploratory models also controlled for previous day alcohol consumption to acknowledge potential variability in hangover susceptibility. RESULTS: On days when participants reported higher severity of hangovers, they reported consuming more hot chips (ß = .09, p = .001), more soft drink (ß = .08, p = .001) and less fruit (ß = -.06, p = .05). In our exploratory model controlling for previous day alcohol consumption, the predictive effect of hangover severity on hot chips remained (ß = .08, p = .009) and significant interaction effects were observed between gender and previous day alcohol consumption on fruit (ß = -.03, p = .003) and vegetable (ß = -.03, p = .03) servings. CONCLUSIONS: Higher hangover severity may lead to greater intake of some unhealthy foods such as hot chips, an effect that may not be reduceable to those associated with alcohol consumption per se. Interventions that target excessive drinking primarily, but also emphasize the importance of a healthy diet, should be considered for this population.