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1.
Behav Res Ther ; 167: 104335, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37327533

RESUMO

Research points to self-control as a possible mechanism for facilitating health behaviour and weight loss. The dual pathway model underpins the role of strong bottom-up reactivity towards food and weak top-down executive functions in obesity. Despite flourishing lab studies on attention bias modification or inhibition trainings, relatively few focused on training both processes to improve self-control in children and adolescents in inpatient multidisciplinary obesity treatment (MOT). Being part of the WELCOME project, this study investigated the effectiveness of Brain Fitness training (using the Dot Probe and Go/No-Go) as an adjunct to inpatient MOT in 131 Belgian children and adolescents. Changes in self-control (performance-based inhibitory control and attention bias as well as self-reported eating behaviour) in the experimental group were compared to sham training. Multiple Imputation was used to handle missing data. Inhibitory control and external eating improved over time (pre/post/follow-up), but we found no evidence for a significant interaction between time and condition. Future research should pay more attention to the role of individual variability in baseline self-control, sham training, and ecological validity of self-control training to improve real-life health behaviour and treatment perspectives for children and adolescents with weight problems.


Assuntos
Pacientes Internados , Autocontrole , Humanos , Criança , Adolescente , Obesidade , Função Executiva , Redução de Peso
2.
Front Endocrinol (Lausanne) ; 13: 822962, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35769076

RESUMO

Background: Inpatient pediatric obesity treatments are highly effective, although dropouts and weight regain threaten long-term results. Preliminary data indicate that leptin, adiponectin, and cardiometabolic comorbidities might predict treatment outcomes. Previous studies have mainly focused on the individual role of adipokines and comorbidities, which is counterintuitive, as these risk factors tend to cluster. This study aimed to predict the dropouts and treatment outcomes by pre-treatment patient characteristics extended with cardiometabolic comorbidities (individually and in total), leptin, and adiponectin. Methods: Children aged 8-18 years were assessed before, immediately after and 6 months after a 12-month inpatient obesity treatment. Anthropometric data were collected at each visit. Pre-treatment lipid profiles; glucose, insulin, leptin, and adiponectin levels; and blood pressure were measured. The treatment outcome was evaluated by the change in body mass index (BMI) standard deviation score (SDS) corrected for age and sex. Results: We recruited 144 children with a mean age of 14.3 ± 2.2 years and a mean BMI of 36.7 ± 6.2 kg/m2 corresponding to 2.7 ± 0.4 BMI SDS. The 57 patients who dropped out during treatment and the 44 patients who dropped out during aftercare had a higher pre-treatment BMI compared to the patients who completed the treatment (mean BMI, 38.3 ± 6.8 kg/m2 vs 35.7 ± 5.5 kg/m2) and those who completed aftercare (mean BMI, 34.6 ± 5.3 kg/m2 vs 37.7 ± 6.3 kg/m2) (all p<0.05). Additionally, aftercare attenders were younger than non-attenders (mean age, 13.4 ± 2.3 years vs 14.9 ± 2.0, p<0.05).Patients lost on average 1.0 ± 0.4 SDS during treatment and regained 0.4 ± 0.3 SDS post-treatment corresponding to regain of 43 ± 27% (calculated as the increase in BMI SDS post-treatment over the BMI SDS lost during treatment). A higher BMI and more comorbidities inversely predicted BMI SDS reduction in linear regression (all p<0.05).The absolute BMI SDS increase after returning home was predicted by pre-treatment leptin and systolic blood pressure, whereas the post-treatment BMI SDS regain was predicted by pre-treatment age, leptin, and adiponectin levels (all p<0.05) in multivariate linear regressions. Conclusion: Patients who need treatment the most are at increased risk for dropouts and weight regain, emphasizing the urgent need for interventions to reduce dropout and support inpatients after discharge. Furthermore, this study is the first to report that pre-treatment leptin and adiponectin levels predict post-treatment BMI SDS regain, requiring further research.


Assuntos
Doenças Cardiovasculares , Obesidade Infantil , Adipocinas , Adiponectina , Adolescente , Criança , Humanos , Leptina , Obesidade Infantil/terapia , Centros de Reabilitação , Fatores de Risco , Resultado do Tratamento , Aumento de Peso , Redução de Peso
3.
Front Psychol ; 12: 644512, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33746859

RESUMO

Several versions of the dot probe detection task are frequently used to assess maladaptive attentional processes associated with a broad range of psychopathology and health behavior, including eating behavior and weight. However, there are serious concerns about the reliability of the indices derived from the paradigm as measurement of attentional bias toward or away from salient stimuli. The present paper gives an overview of different attentional bias indices used in psychopathology research and scrutinizes three types of indices (the traditional attentional bias score, the dynamic trial-level base scores, and the probability index) calculated from a pictorial version of the dot probe task to assess food-related attentional biases in children and youngsters with and without obesity. Correlational analyses reveal that dynamic scores (but not the traditional and probability indices) are dependent on general response speed. Reliability estimates are low for the traditional and probability indices. The higher reliability for the dynamic indices is at least partially explained by general response speed. No significant group differences between youth with and without obesity are found, and correlations with weight are also non-significant. Taken together, results cast doubt on the applicability of this specific task for both experimental and individual differences research on food-related attentional biases in youth. However, researchers are encouraged to make and test adaptations to the procedure or computational algorithm in an effort to increase psychometric quality of the task and to report psychometric characteristics of their version of the task for their specific sample.

4.
Front Pediatr ; 9: 794256, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-35004547

RESUMO

Background: Currently available treatment programs for children with obesity only have modest long-term results, which is (at least partially) due to the poorer self-control observed within this population. The present trial aimed to determine whether an online self-control training, training inhibition, and redirecting attentional bias, can improve the short- and long-term treatment outcome of (in- or outpatient) child obesity treatment programs. Methods: In this double-blind multi-center randomized controlled trial (RCT), participants aged 8-18 years with obesity were allocated in a 1:1 ratio to receive an online self-control or sham training added to their in- or outpatient multidisciplinary obesity treatment (MOT) program. The primary endpoint was BMI SDS. Data were analyzed by linear mixed models and the main interactions of interest were randomization by time and randomization by number of sessions, as the latter was cumulatively expressed and therefore represents the effect of increasing dose over time. Results: One hundred forty-four inpatient (mean age 14.3 ± 2.2 years, BMI 2.7 ± 0.4 SDS, 42% male) and 115 outpatient children (mean age 11.9 ± 2.1 years, BMI 2.4 ± 0.4 SDS, 45% male) were included. Children's BMI lowered significantly during treatment in both the in- and outpatient treatment centers, p < 0.001. In a mixed model with BMI as dependent variable, randomization by time was non-significant, but the number of self-control trainings (randomization * number of sessions) interacted significantly with setting and with age (p = 0.002 and p = 0.047), indicating a potential effect in younger inpatient residents. Indeed, a subgroup analysis on 22 inpatient children of 8-12 years found a benefit of the number of self-control trainings on BMI (p = 0.026). Conclusions: The present trial found no benefit of the self-control training in the entire study population, however a subgroup of young, inpatient participants potentially benefited.

5.
Front Psychiatry ; 11: 309, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32425824

RESUMO

INTRODUCTION: In order to grasp the complex etiology of childhood obesity, we aim to clarify the relationship between external eating and weight. Based on theory and empirical evidence, we claim that inhibition is an important moderator in this association. In our first research question we expected that high external eating would be related to a higher weight status, especially for those with high inhibition problems. Secondly, we explored the moderating role of inhibition in the association between external eating and weight change after a multidisciplinary obesity treatment. METHOD: We investigated n=572 participants (51% boys, aged 7-19) with moderate to extreme obesity recruited in a Belgian inpatient treatment center. At intake, parents reported on inhibition (BRIEF), while the children and adolescents reported on their eating behavior (DEBQ). Weight and length were objectively measured pre and post treatment (ADJUSTED BMI). Two hierarchical linear regression models were built to scrutinize the influence of inhibition on the association between external eating and both baseline weight and weight change. RESULTS: First, predicting baseline weight, we found no significant moderating effect of inhibition problems. Second, predicting weight loss, inhibition turned out to be a substantial moderator, specifically in adolescents. Some unexpected gender differences occurred in favor of adolescent boys, in a way that those with high external eating and low inhibition problems lost most weight. CONCLUSION: Inhibition problems act as a moderator explaining weight loss, but this only holds for adolescents. This suggests that external eating and inhibition play a complex role in weight loss in certain age and gender categories, and stresses the importance of identifying subgroups for tailoring interventions. For those with high inhibition problems, interventions aimed at increasing inhibition skills might be needed to optimize treatment outcomes.

6.
Clin Psychol Rev ; 77: 101840, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32172004

RESUMO

Impulsivity contributes to poor outcomes of existing childhood obesity treatments. Conceptualised within dual-process models, this self-regulation failure reflects the operation of strong automatic processing (heightened food responsivity) and/or weak regulatory processing (poor self-control). This systematic literature review examined the evidence for the self-regulation failure hypothesis from a dual-process models perspective to evaluate its potential for enhancing childhood obesity treatment. Searches were conducted from six databases. Eligibility criteria included: (1) recruited a child or adolescent sample; (2) measured or manipulated one or more automatic and/or regulatory processes (attentional bias, approach bias, working memory, inhibitory control, executive function); (3) used a cross-sectional, longitudinal or experimental design; and (4) included a primary outcome measure that was eating/weight related and/or pertained to the underlying process(es). The search identified 147 eligible studies. Despite methodological variations and inconsistent findings across studies, evidence points to a stronger impact of automatic processes and in particular a reduced capacity for regulatory processing in youngsters with overweight/obesity. Emerging evidence suggests that these processes can be altered by targeted training to curtail food intake and associated weight gain. An intervention protocol based on the dual-process framework has the potential to enhance current childhood obesity treatments. Recommendations for future research are provided.


Assuntos
Modelos Psicológicos , Obesidade Infantil/psicologia , Obesidade Infantil/terapia , Autocontrole/psicologia , Adolescente , Criança , Humanos
7.
Nutrients ; 12(1)2020 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-31936404

RESUMO

BACKGROUND: Reward sensitivity has been associated with adolescents' intake of unhealthy snacks and sugar-sweetened beverages. However, so far, there are no studies published describing the impact of parenting practices on this relationship. The present study will, therefore, investigate whether food parenting practices can moderate the association between reward sensitivity and diet intakes. METHOD: A cross-sectional research study was conducted among 14- to 16-year old Flemish adolescents (n = 867, age 14.7 ± 0.8 y, 48.1% boys) and a subset of their parents (n = 131), collecting data on daily intakes, reward sensitivity, and food parenting practices. Linear regression was used to assess the moderation effect of parenting practices (both adolescent- and parent-reported) on the relationship between reward sensitivity, and diet using SPSS 25.0. RESULTS: In the main analysis (adolescent-reported), no significant moderation effects were found for parenting practices on the relationship between reward sensitivity and diet. However, the sensitivity analysis (parent-reported) showed a moderation effect for health-reducing parenting practices on the association between reward sensitivity and unhealthy snack intake (ß = 0.297, 95% CI = 0.062, 0.531, p = 0.01). CONCLUSION: Given the difference in the effect of parenting practices between the adolescent- and parent-reported data, our inconclusive findings warrant more research in larger adolescent-parent dyad samples.


Assuntos
Comportamento Alimentar/psicologia , Poder Familiar , Lanches , Bebidas Adoçadas com Açúcar , Adolescente , Adulto , Feminino , Promoção da Saúde , Humanos , Masculino
8.
Clin Psychol Psychother ; 27(1): 42-51, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31711275

RESUMO

Training self-control as the assumed underlying mechanism for weight loss is a promising pathway for improving long-term outcomes of childhood multidisciplinary obesity treatment (MOT). The present study is the first to analyse adherence to e-health self-control training in paediatric obesity. We hypothesized that low adherence would relate to child characteristics and to contextual treatment barriers. Participants were recruited as a part of a larger randomized controlled trial, evaluating an e-health self-control training during inpatient MOT (intensive phase) and its outpatient aftercare (booster phase). A number of 68 youngsters with severe obesity between 11 to 19 years old were included in the present study. Excellent adherence was observed in the intensive phase during inpatient MOT, but rates decreased in the booster phase. As predicted, the low adherence group had a significantly higher weight status throughout the entire study period. Differences in contextual treatment barriers did not appear. Further in-depth analysis showed that the low adherence group frequently experienced practical obstacles. The end of inpatient MOT and high weight status can be considered important risk factors for low adherence in an additional self-control training aimed at facilitating weight loss.


Assuntos
Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Cooperação do Paciente/estatística & dados numéricos , Obesidade Infantil/terapia , Autocontrole , Telemedicina/métodos , Adolescente , Adulto , Bélgica , Criança , Feminino , Humanos , Masculino , Obesidade Infantil/psicologia , Adulto Jovem
9.
J Stud Alcohol Drugs ; 80(6): 631-640, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31790353

RESUMO

OBJECTIVE: Accumulating evidence indicates that social networking sites play an increasingly important role in young people's drinking behavior. The present study adds to this research by assessing the conditionality of the relationships between exposure to and self-sharing of alcohol-related content on social media and adolescents' drinking behavior. Specifically, the moderating role of the five-factor model of personality is determined. METHOD: A cross-sectional survey study was conducted among 866 mid-adolescents (Msubsample = 14.85 years, SD = 0.71, 57.5% girls). Polynomial regression analysis with response surface modeling was used to test the interactions. RESULTS: Exposure, but not self-sharing, was directly associated with more alcohol consumption. However, it appeared that the act of sharing was more important than the frequency of sharing. Next, the relationship between exposure and consumption was not found to be moderated by personality. In contrast, there were significant linear and nonlinear interactions between self-sharing and all five personality traits. Individuals who are predisposed to engage in more alcohol consumption experience a stronger association between self-sharing and their drinking behavior. CONCLUSIONS: Social media can play a role in adolescents' drinking behavior, but this role is partially dependent on temperamental predispositions.


Assuntos
Comportamento do Adolescente/psicologia , Consumo de Bebidas Alcoólicas/psicologia , Personalidade , Mídias Sociais/estatística & dados numéricos , Rede Social , Adolescente , Estudos Transversais , Feminino , Humanos , Masculino , Modelos Psicológicos , Inquéritos e Questionários
10.
Front Psychol ; 10: 2363, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31695649

RESUMO

Although it has been proposed that obese and healthy weight individuals might differ in their reward and punishment sensitivity, the literature shows diverse and inconsistent findings. The current study was set out to examine the role of reward and punishment sensitivity in adolescent obesity by differentiating between reward responsivity and reward drive, and by complementing self-report measures with performance-based measures indexing attention for cues signaling reward and punishment as well as effort to approach reward and avoid punishment. Participants were adolescents aged 12-23, with obesity (n = 51, adjusted BMI [(actual BMI/Percentile 50 of BMI for age and gender) × 100) between 143 and 313%], and with a healthy weight (n = 51, adjusted BMI between 75 and 129%). Individuals with obesity did not significantly differ from adolescents with a healthy weight in reward responsivity, reward drive or attention to cues signaling reward. Further, no differences in self-reported punishment sensitivity or attention for cues signaling punishment were found between obese and healthy weight adolescents. The current study thus does not corroborate the theories that general reward and punishment sensitivity play a role in obesity.

11.
Assessment ; 26(7): 1282-1295, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-29094612

RESUMO

The present study examined the factor structure and measurement invariance of the Behavioral Inhibition System/Behavioral Approach System (BIS/BAS) scales parent-report in children and adolescents (N = 1,444, 58% girls) across age (Group 1, 2-5 years; Group 2, 6-9 years; Group 3, 10-13 years; Group 4, 14-18 years old) and gender. The results consistently underscored a four-factor structure, resembling the original factor structure, with one BIS-factor and three BAS-factors. Multigroup confirmatory factor analysis showed full measurement invariance across gender as well as across Group 1 and 2, and Group 2 and 3. Strong measurement invariance was found across Group 3 and 4, Group 1 and 3, and Group 2 and 4. Configural and metric invariance was found across Group 1 and 4. Hence, mean-level BIS/BAS scores can be compared across gender and age although comparison between preschool children (Group 1) and late secondary school children (Group 4) should be done with caution.


Assuntos
Comportamento Infantil/psicologia , Pais/psicologia , Testes de Personalidade/normas , Adolescente , Distribuição por Idade , Bélgica , Criança , Pré-Escolar , Análise Fatorial , Feminino , Humanos , Lactente , Masculino , Psicometria , Distribuição por Sexo
13.
BMC Public Health ; 18(1): 1075, 2018 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-30157826

RESUMO

BACKGROUND: Obesity is a widespread problem that not only leads to medical and psychological diseases in adults, but also in children and adolescents at an early stage in life. Because of its global burden on both the individual and society, it is necessary to develop effective evidence-based treatments. Current "Multidisciplinary Obesity Treatments" (MOT) already provide significant weight loss, but still leave room for more long-lasting improvements. In this protocol paper, we outline the research goals of the WELCOME trial, based on a substantial proof of concept. METHODS: In this Randomized Controlled Trial (RCT) - conducted in both an inpatient and two outpatient treatment settings - existing MOT will be supplemented with an Executive Function (EF) training and compare effects on various parameters in an experimental versus an active control group of obese youngsters (8-18 years old). WELCOME aims to (a) train youngsters' executive functions to facilitate effects on weight loss, psychological and medical comorbidities, (b) to enhance the long-term effects by continuing the training in the daily home context with booster sessions, and (c) to investigate its effects until a 6-month follow-up. In comparison to the active control group, better progress is expected in the experimental group on following variables: weight, psychological comorbidities (unhealthy eating behavior, internalizing symptoms, impaired self-esteem) and medical comorbidities (metabolic syndromes, endothelia dysfunction, tonsillar hypertrophy and sleep obstruction). DISCUSSION: It is stated that this EF-training for enhancing self-control abilities is necessary for a long-lasting effect of childhood obesity treatment interventions. TRIAL REGISTRATION: The Study Procotol was registered on 10/05/2017 (n° ISRCTN14722584 ).


Assuntos
Função Executiva , Obesidade Infantil/prevenção & controle , Obesidade Infantil/psicologia , Adolescente , Criança , Protocolos Clínicos , Comorbidade , Feminino , Seguimentos , Humanos , Masculino , Obesidade Infantil/epidemiologia , Autocontrole/psicologia , Resultado do Tratamento , Redução de Peso
14.
BMC Public Health ; 18(1): 904, 2018 07 21.
Artigo em Inglês | MEDLINE | ID: mdl-30031383

RESUMO

BACKGROUND: The transition from childhood into adolescence can be considered as a critical developmental period. Moreover, adolescence is associated with a decreased use of adaptive emotion regulation strategies and an increased use of maladaptive emotion regulation strategies increasing the risk of emotional problems. Targeting emotion regulation is therefore seen as an innovative prevention approach. The present study aims to evaluate the effectiveness of Boost camp, an innovative school-based prevention program targeting ER, on adolescents' emotion regulation skills and emotional wellbeing. Also secondary outcomes and possible moderators will be included. METHODS: The aim is to reach 300 adolescents (16 class groups, 6 schools) in their first year of high school. A clustered Randomized Controlled Trial (RCT) with two conditions, intervention (n = 150) and control (n = 150), will be set up. Adolescents in the intervention condition will receive 14 lessons over the course of 2 days, followed by Booster sessions, and will be compared with adolescents in a non-intervention control group. The outcomes will be measured by self-report questionnaires at baseline, immediately after Boost camp, and at three and 6 months follow-up. DISCUSSION: Data-collection is planned to be completed in May 2018. Data-analyses will be finished the end of 2018. The presented paper describes the Boost camp program and the clustered RCT design to evaluate its effectiveness. It is expected that Boost camp will have beneficial effects. If found effective, Boost camp will have the potential to increase adolescent's ER and well-being, and reduce the risk to become adults in need. The trials is registered on the 13th of June 2017 in ISRCTN registry [ISRCTN68235634].


Assuntos
Transtornos Mentais/prevenção & controle , Serviços de Saúde Mental , Serviços de Saúde Escolar , Autocontrole/psicologia , Estudantes/psicologia , Adolescente , Comportamento do Adolescente , Análise por Conglomerados , Emoções , Feminino , Humanos , Masculino , Saúde Mental , Pais , Ensaios Clínicos Controlados Aleatórios como Assunto , Reprodutibilidade dos Testes , Inquéritos e Questionários
15.
Public Health Nutr ; 21(12): 2329-2344, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29607800

RESUMO

OBJECTIVE: Adolescents' snacking habits are driven by both explicit reflective and implicit hedonic processes. Hedonic pathways and differences in sensitivity to food rewards in addition to reflective determinants should be considered. The present study evaluated the feasibility and impact of a mobile phone-delivered intervention, incorporating explicit reflective and implicit rewarding strategies, on adolescents' snack intake. DESIGN: Adolescents (n 988; mean age 14·9 (sd 0·70) years, 59·4 % boys) completed a non-randomized clustered controlled trial. Adolescents (n 416) in the intervention schools (n 3) were provided with the intervention application for four weeks, while adolescents (n 572) in the control schools (n 3) followed the regular curriculum. Outcomes were differences in healthy snacking ratio and key determinants (awareness, intention, attitude, self-efficacy, habits and knowledge). Process evaluation data were collected via questionnaires and through log data of the app. RESULTS: No significant positive intervention effects on the healthy snack ratio (b=-3·52 (se 1·82), P>0·05) or targeted determinants were observed. Only 268 adolescents started using the app, of whom only fifty-five (20·5 %) still logged in after four weeks. Within the group of users, higher exposure to the app was not significantly associated with positive intervention effects. App satisfaction ratings were low in both high and low user groups. Moderation analyses revealed small positive intervention effects on the healthy snack ratio in high compared with low reward-sensitive boys (b=1·38 (se 0·59), P<0·05). CONCLUSIONS: The intervention was not able to improve adolescents' snack choices, due to low reach and exposure. Future interventions should consider multicomponent interventions, teacher engagement, exhaustive participatory app content development and tailoring.


Assuntos
Dieta/estatística & dados numéricos , Promoção da Saúde , Aplicativos Móveis , Recompensa , Lanches , Adolescente , Estudos de Viabilidade , Comportamento Alimentar , Feminino , Hábitos , Promoção da Saúde/métodos , Promoção da Saúde/estatística & dados numéricos , Humanos , Masculino , Inquéritos e Questionários
16.
JMIR Mhealth Uhealth ; 5(4): e58, 2017 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-28442455

RESUMO

BACKGROUND: Efforts to improve snacking and drinking habits are needed to promote a healthy body mass index (BMI) in adolescents. Although commercial fitness and nutrition mobile phone apps are widely used, little is known regarding their potential to improve health behaviors, especially in adolescents. In addition, evidence on the mechanisms through which such fitness and nutrition apps influence behavior is lacking. OBJECTIVES: This study assessed whether the use of commercial fitness or nutrition apps was associated with a lower BMI and healthier snacking and drinking habits in adolescents. Additionally, it explored if perceived behavioral control to eat healthy; attitudes to eat healthy for the good taste of healthy foods, for overall health or for appearance; social norm on healthy eating and social support to eat healthy mediated the associations between the frequency of use of fitness or nutrition apps and BMI, the healthy snack, and beverage ratio. METHODS: Cross-sectional self-reported data on snack and beverage consumption, healthy eating determinants, and fitness and nutrition app use of adolescents (N=889; mean age 14.7 years, SD 0.8; 54.8% [481/878] boys; 18.1% [145/803] overweight) were collected in a representative sample of 20 schools in Flanders, Belgium. Height and weight were measured by the researchers. The healthy snack ratio and the healthy beverage ratio were calculated as follows: gram healthy snacks or beverages/(gram healthy snacks or beverages+gram unhealthy snacks or beverages)×100. Multilevel regression and structural equation modeling were used to analyze the proposed associations and to explore multiple mediation. RESULTS: A total of 27.6% (245/889) of the adolescents used fitness, nutrition apps or both. Frequency of using nutrition apps was positively associated with a higher healthy beverage ratio (b=2.96 [1.11], P=.008) and a higher body mass index z-scores (zBMI; b=0.13 [0.05], P=.008. A significant interaction was found between the frequency of using nutrition and for the zBMI (b=-0.03 [0.02], P=.04) and the healthy snack ratio (b=-0.84 [0.37], P=.03). Attitude to eat healthy for appearance mediated both the fitness app use frequency-zBMI (a × b=0.02 [0.01], P=.02) and the nutrition app use frequency-zBMI (a × b=0.04 [0.01], P=.001) associations. No mediation was observed for the associations between the frequency of use of fitness or nutrition apps and the healthy snack or beverage ratio. CONCLUSIONS: Commercial fitness and nutrition apps show some association with healthier eating behaviors and BMI in adolescents. However, effective behavior change techniques should be included to affect key determinants of healthy eating.

17.
Br J Nutr ; 117(4): 611-620, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28382893

RESUMO

Adolescents' snack choices could be altered by increasing the reinforcing value (RV) of healthy snacks compared with unhealthy snacks. This study assessed whether the RV of fruit increased by linking it to a reward and if this increased RV was comparable with the RV of unhealthy snacks alone. Moderation effects of sex, hunger, BMI z-scores and sensitivity to reward were also explored. The RV of snacks was assessed in a sample of 165 adolescents (15·1 (sd 1·5) years, 39·4 % boys and 17·4 % overweight) using a computerised food reinforcement task. Adolescents obtained points for snacks through mouse clicks (responses) following progressive ratio schedules of increasing response requirements. Participants were (computer) randomised to three experimental groups (1:1:1): fruit (n 53), fruit+reward (n 60) or unhealthy snacks (n 69). The RV was evaluated as total number of responses and breakpoint (schedule of terminating food reinforcement task). Multilevel regression analyses (total number of responses) and Cox's proportional hazard regression models (breakpoint) were used. The total number of responses made were not different between fruit+reward and fruit (b -473; 95 % CI -1152, 205, P=0·17) or unhealthy snacks (b410; 95 % CI -222, 1043, P=0·20). The breakpoint was slightly higher for fruit than fruit+reward (HR 1·34; 95 % CI 1·00, 1·79, P=0·050), whereas no difference between unhealthy snacks and fruit+reward (HR 0·86; 95 % CI 0·62, 1·18, P=0·34) was observed. No indication of moderation was found. Offering rewards slightly increases the RV of fruit and may be a promising strategy to increase healthy food choices. Future studies should however, explore if other rewards, could reach larger effect sizes.


Assuntos
Dieta , Preferências Alimentares/psicologia , Frutas , Comportamentos Relacionados com a Saúde , Recompensa , Lanches/psicologia , Adolescente , Feminino , Humanos , Masculino , Modelos de Riscos Proporcionais
19.
Appetite ; 112: 150-156, 2017 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-28108344

RESUMO

BACKGROUND: During the last three decades, the prevalence of childhood overweight and obesity has increased worldwide. It is well established that different child-related factors such as food approach behaviors (i.e. eating behaviors that imply movements towards food) contribute to the development of overweight. However, research is lacking on the underlying mechanisms leading to food approach behaviors, which in turn lead to overweight. SUBJECT/METHODS: Via parent-report questionnaires, we investigated the relation between the personality trait reward sensitivity and body weight in a convenience sample of 211 children aged 2.5-9 years. We further investigated the intervening role of food approach behaviors in the association between reward sensitivity and body weight. RESULTS: Unexpectedly, there was no direct association between reward sensitivity and body weight. Despite the absence of a direct effect, a significant indirect association was found between reward sensitivity and body weight through the intervening food approach variables (i.e. food responsive behavior and external eating). CONCLUSIONS: These results highlight the importance of the focus on eating behaviors as well as trait characteristics in prevention programs for overweight.


Assuntos
Peso Corporal , Comportamento Infantil , Sinais (Psicologia) , Comportamento Alimentar , Obesidade Infantil/etiologia , Personalidade , Recompensa , Índice de Massa Corporal , Criança , Pré-Escolar , Ingestão de Alimentos , Feminino , Alimentos , Humanos , Masculino , Sobrepeso/etiologia , Poder Familiar , Inquéritos e Questionários
20.
BMC Public Health ; 16(1): 1045, 2016 10 04.
Artigo em Inglês | MEDLINE | ID: mdl-27716268

RESUMO

BACKGROUND: The aim of the current study is to identify strategies to promote healthy eating in young children that can be applied by caregivers, based on their own perceptions of effectiveness and feasibility. Whereas previous research mainly focused on parental influences on children's eating behavior, the growing role of other caregivers in the upbringing of children can no longer be denied. METHODS: Four focus groups were conducted with three types of caregivers of post-weaning children under 6 years old: parents (n = 14), family child care providers (n = 9), and daycare assistants (n = 10). The audiotaped focus group discussions were transcribed and imported into Nvivo 10.0 for thematic analysis. The behaviors put forward by the caregivers were categorized within three broad dimensions: global influences, general behaviors, and specific feeding practices. RESULTS: Perceived effective strategies to promote healthy eating behavior in children included rewards, verbal encouragement, a taste-rule, sensory sensations, involvement, variation, modeling, repeated exposure, and a peaceful atmosphere. Participants mainly disagreed on the perceived feasibility of each strategy, which largely depended on the characteristics of the caregiving setting (e.g. infrastructure, policy). CONCLUSIONS: Based on former research and the current results, an intervention to promote healthy eating behaviors in young children should be adapted to the caregiving setting or focus on specific feeding practices, since these involve simple behaviors that are not hindered by the limitations of the caregiving setting. Due to various misconceptions regarding health-promoting strategies, clear instructions about when and how to use these strategies are necessary.


Assuntos
Cuidadores/organização & administração , Cuidado da Criança/organização & administração , Saúde da Criança , Dieta Saudável/estatística & dados numéricos , Comportamento Alimentar , Relações Pais-Filho , Pais/educação , Adulto , Criança , Pré-Escolar , Feminino , Grupos Focais , Humanos , Masculino , Inquéritos e Questionários
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