BACKGROUND: Longitudinal investigation of the association between mobile health (mHealth) app use and attitudes toward one's body during adolescence is scarce. mHealth apps might shape adolescents' body image perceptions by influencing their attitudes toward their bodies. Adolescents might also use mHealth apps based on how they feel and think about their bodies. OBJECTIVE: This prospective study examined the longitudinal within-person associations between mHealth app use, body dissatisfaction, and physical self-worth during adolescence. METHODS: The data were gathered from a nationally representative sample of Czech adolescents aged between 11 and 16 years (N=2500; n=1250, 50% girls; mean age 13.43, SD 1.69 years) in 3 waves with 6-month intervals. Participants completed online questionnaires assessing their mHealth app use, physical self-worth, and body dissatisfaction at each wave. The mHealth app use was determined by the frequency of using sports, weight management, and nutritional intake apps. Physical self-worth was assessed using the physical self-worth subscale of the Physical Self Inventory-Short Form. Body dissatisfaction was measured with the items from the body dissatisfaction subscale of the Eating Disorder Inventory-3. The random intercept cross-lagged panel model examined longitudinal within-person associations between the variables. A multigroup design was used to compare genders. Due to the missing values, the final analyses used data from 2232 adolescents (n=1089, 48.8% girls; mean age 13.43, SD 1.69 years). RESULTS: The results revealed a positive within-person effect of mHealth app use on the physical self-worth of girls: increased mHealth app use predicted higher physical self-worth 6 months later (β=.199, P=.04). However, this effect was not consistent from the 6th to the 12th month: a within-person increase in using apps in the 6th month did not predict changes in girls' physical self-worth in the 12th month (β=.161, P=.07). Regardless of gender, the within-person changes in the frequency of using apps did not influence adolescents' body dissatisfaction. In addition, neither body dissatisfaction nor physical self-worth predicted app use frequency at the within-person level. CONCLUSIONS: This study highlighted that within-person changes in using mHealth apps were differentially associated with adolescents' body-related attitudes. While increased use of mHealth apps did not influence body dissatisfaction across genders, it significantly predicted higher physical self-worth in adolescent girls 6 months later. A similar association was not observed among boys after 6 months. These findings indicate that using mHealth apps is unlikely to have a detrimental impact on adolescents' body dissatisfaction and physical self-worth; instead, they may have a positive influence, particularly in boosting the physical self-worth of adolescent girls.

• Klíčová slova
• RI-CLPM, adolescent, body dissatisfaction, longitudinal study, mHealth app, physical self-worth, random intercept cross-lagged panel model,
• MeSH
• chování mladistvých * psychologie   MeSH
• dítě MeSH
• lidé MeSH
• longitudinální studie MeSH
• mladiství MeSH
• mobilní aplikace * statistika a číselné údaje   MeSH
• nespokojenost s tělem * psychologie   MeSH
• představa o vlastním těle * psychologie   MeSH
• prospektivní studie MeSH
• průzkumy a dotazníky MeSH
• sebepojetí * MeSH
• telemedicína statistika a číselné údaje   MeSH
• Check Tag
• dítě MeSH
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Česká republika MeSH

BACKGROUND: Online weight loss information is commonly sought by internet users, and it may impact their health decisions and behaviors. Previous studies examined a limited number of Google search queries and relied on manual approaches to retrieve online weight loss websites. OBJECTIVE: This study aimed to identify and describe the characteristics of the top weight loss websites on Google. METHODS: This study gathered 432 Google search queries collected from Google autocomplete suggestions, "People Also Ask" featured questions, and Google Trends data. A data-mining software tool was developed to retrieve the search results automatically, setting English and the United States as the default criteria for language and location, respectively. Domain classification and evaluation technologies were used to categorize the websites according to their content and determine their risk of cyberattack. In addition, the top 5 most frequent websites in nonadvertising (ie, nonsponsored) search results were inspected for quality. RESULTS: The results revealed that the top 5 nonadvertising websites were healthline.com, webmd.com, verywellfit.com, mayoclinic.org, and womenshealthmag.com. All provided accuracy statements and author credentials. The domain categorization taxonomy yielded a total of 101 unique categories. After grouping the websites that appeared less than 5 times, the most frequent categories involved "Health" (104/623, 16.69%), "Personal Pages and Blogs" (91/623, 14.61%), "Nutrition and Diet" (48/623, 7.7%), and "Exercise" (34/623, 5.46%). The risk of being a victim of a cyberattack was low. CONCLUSIONS: The findings suggested that while quality information is accessible, users may still encounter less reliable content among various online resources. Therefore, better tools and methods are needed to guide users toward trustworthy weight loss information.

• Klíčová slova
• Google, consumer health informatics, cyberattack risk, data mining, digital health, information seeking, internet search, online health information, website analysis, weight loss,
• MeSH
• data mining * metody   MeSH
• hmotnostní úbytek * MeSH
• internet * MeSH
• lidé MeSH
• vyhledávač MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Spojené státy americké MeSH

Despite robust research evidence for the role of attractive-body portrayals in body image, the effect of positive appearance comments that endorse them on social media remains unclear. Therefore, using a between-subject experimental design and the data from 613 Czech adolescents (52% girls) aged 13-18 (M = 15.5, SD = 1.7), the present study examined exposure to positive appearance comments on body dissatisfaction, and the moderating roles of media-ideal internalization, appearance schematicity, body appreciation, and gender. Our data supported the presumed intensifying effect of the positive appearance comments on post-exposure body dissatisfaction, but only for adolescent girls. The impact of positive comments was not moderated by the media-ideal internalization, appearance schematicity, or body appreciation. However, the exploratory results showed that the displayed bodies' perceived attractiveness intensified the positive comments' effect on body dissatisfaction, which makes it a potentially important factor to target for the prevention of negative social media effects on body image. Furthermore, the individual characteristics that moderated the exposure to attractive images in the prior research may not determine the effects of the positive comments. Future research may need to capture factors that specifically influence the processing of such comments, such as susceptibility to peer feedback on physical appearance.

• Klíčová slova
• Adolescents, Body dissatisfaction, Body image, Experiment, Positive appearance comments, Social media,
• MeSH
• fyzický vzhled těla * MeSH
• lidé MeSH
• mladiství MeSH
• nespokojenost s tělem * MeSH
• osobní uspokojení MeSH
• představa o vlastním těle psychologie   MeSH
• sociální média * MeSH
• Check Tag
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Knowledge of the characteristics of adolescents who use mobile health (mHealth) apps to monitor health and how these characteristics differ from those of app nonusers is limited. OBJECTIVE: We aimed to determine mHealth app use based on adolescent and parental factors, including sociodemographics, digital skills, and health indicators, in a nationally representative sample of Czech adolescents (N=2500). METHODS: Adolescents aged 11 to 16 years and one of their parents participated in an online survey in 2021. A professional research agency recruited the participants. Quotas were used to ensure the sample's representativeness. The sociodemographic factors were the adolescents' age, gender, and parental perceived financial security. The adolescents also provided information about their screen time, eHealth literacy, BMI, health anxiety, physical activity, and sleep quality. Parents reported their digital skills, mobile phone attitudes, and the mediation of their children's online health information-seeking behaviors. We evaluated the differences between the users and nonusers of mHealth apps and identified the significant predictors of mHealth app use. Next, we separately examined how these factors were associated with the use of mHealth apps that track calorie intake or expenditure, number of steps, weight, or sports activity (eg, exercise, running, and working out), as well as other mHealth apps (eg, those that track sleep and heart rate). RESULTS: More than half of the adolescents (1429/2455, 58.21%) reported using mHealth apps. App users were relatively older and, more often, girls. Apps that counted the number of steps were used most frequently, and adolescents whose parents reported higher perceived financial security used them more regularly. Overall, being older and physically active and having higher eHealth literacy skills were associated with using mHealth apps. Adolescents with higher BMI, health anxiety, and lower sleep quality more frequently used mHealth apps to track calorie intake or expenditure, weight, and health indicators. mHealth apps to track physical activity were used more regularly by girls. There was a positive association between parental mediation of online health information-seeking behaviors and adolescents' mHealth app use. CONCLUSIONS: These findings demonstrated that older age, physical activity, and eHealth literacy skills were the common underlying factors of adolescents' mHealth app use. We initially showed parents as significant role models for their children's adoption of, and engagement with, mHealth apps when they actively mediate their online health information-seeking behaviors. Improving the eHealth literacy skills of adolescents through parental guidance might enhance health technology use in this population. Tracking eating behaviors, weight, and health were more prevalent for adolescents who reported higher BMI, health anxiety, and lower sleep quality. Future research studies should examine the determinants and health outcomes of adolescents' mHealth app use longitudinally.

• Klíčová slova
• body mass index, digital skills, eHealth literacy, health anxiety, mHealth, mobile health, mobile phone, parental mediation, phone attitudes, sleep,
• MeSH
• dítě MeSH
• lidé MeSH
• mladiství MeSH
• mobilní aplikace * MeSH
• mobilní telefon * MeSH
• průřezové studie MeSH
• rodiče MeSH
• telemedicína * MeSH
• Check Tag
• dítě MeSH
• lidé MeSH
• mladiství MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

BACKGROUND: Lesbian, gay, bisexual, transgender, intersexual and queer (LGBTIQ) individuals are often stigmatized due to their minority status. Sexual-minority stress is often discussed as a risk factor for the increased mental health problems reported in this population. OBJECTIVE: The current study (1) investigated eating attitudes and depressive symptoms in a sexual minority sample from Turkey who identify themselves as LGBTIQ and (2) explored the role of sexual minority stressors beyond the potential predictors of eating attitudes and depressive symptoms in this population. METHODS: Recruitment was supported and streamlined by several Turkish NGOs and LGBTIQ community networks. Sociodemographic measures, eating attitudes, depressive symptoms, sexual minority stressors (e.g., heterosexist experiences, internalized homophobia), and the potential predictors of eating attitudes and depressive symptoms were assessed with an anonymous online survey between February 2022 and June 2022. The sample consisted of 440 participants. The mean age was 31.92 (SD = 11.82). The majority of the participants reported their current gender identity as male (64.3%; n = 440) and their sexual orientation as attracted to men (62.8%; n = 439). For 79.7% of the participants, the assigned sex at birth was man (n = 439). RESULTS: Two separate three-stage multiple hierarchical regression analyses were conducted, controlling for sociodemographic characteristics and the risk and protective factors of eating attitudes and depressive symptoms. Disturbed eating attitudes were predicted by assigned female sex at birth, higher scores for depression, social isolation, and the total number of heterosexist experiences, and lower distress related to heterosexist experiences. Depressive symptoms were predicted by assigned female sex at birth, lesbian sexual orientation, disturbance in eating attitudes, increases in generalized anxiety, and distress related to daily heterosexist experiences. CONCLUSION: The current study demonstrated the significant role of sexual minority stressors in the prediction of disturbed eating attitudes and depressive symptomatology beyond the general psychosocial vulnerability factors. These findings emphasize the need for developing strategies to reduce prejudicial attitudes at the societal level and to enhance the skills of LGBTIQ individuals in coping with sexual minority stressors in Turkey.

• Klíčová slova
• LGBT, LGBTIQ, depressive symptoms, eating attitudes, sexual minority,
• Publikační typ
• časopisecké články MeSH