Skin Cancer Risk Perception and Tanning Bed Use: A Population-Based Survey to Identify Persons at Risk for Melanoma in Olmsted County, Minnesota.

BACKGROUND: Cutaneous melanoma is strongly associated with tanning bed use. OBJECTIVE: To describe local residents' knowledge, attitudes, and behavior regarding skin cancer and tanning bed use and to estimate prevalence of high risk for melanoma. MATERIALS AND METHODS: A survey was mailed to 886 local residents (549, aged 18-39 years; 337, aged ≥40 years). Logistic and linear regression and univariate and multivariable analysis were used to assess perceived risk and skin cancer knowledge. RESULTS: The response rate was 21%; 55% of the younger group and 37% of the older group had used indoor tanning, and prevalence of high risk for melanoma according to a skin cancer risk calculator was 18% in the younger group and 33% in the older group. Individuals with high risk scores were more likely to correctly perceive that they were at high risk for skin cancer. Most participants with high risk scores and those who previously used tanning beds reported low likelihood of future indoor tanning. CONCLUSION: Female sex, high risk score, and previous indoor tanning were associated with participants' views of higher skin cancer risk. No specific knowledge gaps were identified. Understanding community residents' attitudes about skin cancer and indoor tanning can help guide interventions.

Sunburn, Sun Safety and Indoor Tanning Among Schoolchildren in Ireland.

Objectives: We present patterns of sunburn, sun safety behaviors and indoor tanning bed use in a nationally representative sample of schoolchildren aged 10-17. These behaviors were explored across gender, age, and social class groups. Methods: Within the Health Behaviour in School-aged Children (HBSC) Ireland study, 10,271 young people (aged 13.54 ± 1.92, percentage girls 53.3%) reported frequency of sun safety behaviors, sunburn, and frequency and circumstances of indoor tanning bed use. Results: Children frequently experienced sunburn (90% lifetime, 74% last year), and 3% reported never using any sun protection. Applying sunscreen and wearing sunglasses were the most commonly used sun safety measures; other ways of sun protection were less popular. Indoor tanning bed use was reported by around 5%, and a large proportion of users were not advised of any indoor tanning safety measures. Sun safety behaviors varied by age and gender, with some socio-economic differences in tanning bed use. An association was found between frequency of family holidays abroad and sunburn. Conclusion: Targeted interventions are needed to increase sun safety behaviors and eliminate tanning bed use among children in Ireland.

Low sun exposure habits is associated with a dose-dependent increased risk of hypertension: a report from the large MISS cohort.

In prospective observational cohort studies, increasing sun exposure habits have been associated with reduced risk of cardiovascular mortality. Our aim was to assess possible observational mechanisms for this phenomenon. A written questionnaire was answered by 23,593 women in the year 2000 regarding risk factors for melanoma, including factors of possible interest for hypertension, such as detailed sun exposure habits, hypertension, marital status, education, smoking, alcohol consumption, BMI, exercise, and chronic high stress. Hypertension was measured by the proxy "use of hypertension medication" 2005-2007, and high stress by "need of anti-depressive medication". Sun exposure habits was assessed by the number of `yes' to the following questions; Do you sunbath during summer?, During winter vacation?, Do you travel south to sunbath?, Or do you use sun bed? Women answering 'yes' on one or two questions had moderate and those answering 'yes' on three or four as having greatest sun exposure. The main outcome was the risk of hypertension by sun exposure habits adjusted for confounding. As compared to those women with the greatest sun exposure, women with low and moderate sun exposure were at 41% and 15% higher odds of hypertension (OR 1.41, 95% CI 1.3‒1.6, p < 0.001 and OR 1.15, 95% CI 1.1‒1.2, p < 0.001), respectively. There was a strong age-related increased risk of hypertension. Other risk factors for hypertension were lack of exercise (OR 1.36), a non-fair phenotype (OR 1.08), chronic high stress level (OR 1.8), and lack of university education (OR 1.3). We conclude that in our observational design sun exposure was associated with a dose-dependent reduced risk of hypertension, which might partly explain the fewer deaths of cardiovascular disease with increasing sun exposure.

The Association Between the Genetic VDR SNP c.907+75C>T and Prostate Cancer Risk Is Modified by Tanning Potential.

BACKGROUND: Prostate cancer (PCa) is a multifactorial disease involving complex interactions between genetic and physiological/environmental factors. Vitamin D receptor (VDR) plays a role in numerous cellular pathways and it has been suggested that VDR genetic variants influence individual susceptibility to PCa. MATERIALS AND METHODS: Logistic regression analysis was used to assess the association of six VDR single nucleotide polymorphisms (SNPs) and factors such as tanning potential and UV sunlight exposure with PCa risk. RESULTS: Marginal significant interactions were found, with a 2-fold increase risk of PCa between SNP 1 (c.278-69G>A) and sunlight UV exposure [odds ratio (OR)=2.02, 95% confidence intervaI (CI)=1.036-4.36; p=0.05]; and a 4-fold increase risk of PCa between SNP 4 (c.907+75C>T) and tanning potential (OR=4.40, 95% CI=0.89-29.12; p=0.0591). In contrast, SNP 5 (rs731236, TaqI) and tanning potential interaction had a protective effect by reducing the risk of PCa by 55% (ß=-0.804; OR=0.448, 95% CI=0.197-9.42; p=0.0427). SNPs 2 (rs61614328) and 6 (rs533037428) did not show any association with PCa even in the presence of UV sunlight exposure. CONCLUSION: The protective effect of SNP 4 from PCa is lost and modified by tanning potential in African Americans. This finding needs to be verified by larger studies in different ethnic populations.

Prevalence and Location of Indoor Tanning Among High School Students in New Jersey 5 Years After the Enactment of Youth Access Restrictions.

Importance: Several state governments have enacted bans on the use of indoor tanning beds at tanning salons among minors, but studies of the association of such restrictions with tanning behavior have produced mixed results. Little is known about the prevalence of tanning in nonsalon locations that are typically not covered by restrictions. Evidence that age bans are associated with a reduction in tanning bed use is needed to support policy makers' efforts to expand tanning regulations. Objective: To determine the prevalence and location of indoor tanning among New Jersey youths after a 2013 statewide indoor tanning ban for minors younger than 17 years. Design, Setting, and Participants: This survey study comprised 4 biennial (2012-2018) and representative cross-sectional surveys conducted among 12 659 high school students (grades 9-12) in New Jersey. Main Outcomes and Measures: The main outcome was the frequency of indoor tanning in the past year. Location of tanning bed use (ie, tanning salons or nonsalon locations, such as private residences or gyms) was also assessed. Results: Survey responses from a total of 12 659 high school students (6499 female [51%]; mean [SD] age, 15.8 [1.3] years) were analyzed across the 4 survey waves. Tanning prevalence among students younger than 17 years (ie, younger than the legal tanning age) was 48% lower in 2018 compared with 2012 (adjusted odds ratio, 0.52; 95% CI, 0.33-0.81; P = .002). Tanning prevalence was 72% lower among female students 17 years or older (adjusted odds ratio, 0.28; 95% CI, 0.18-0.44; P < .001). Prevalence rates were not significantly different for male students 17 years or older and for racial/ethnic minority students. The prevalence of tanning in salons and private residences was similar among students younger than 17 years. Conclusions and Relevance: This study suggests that the prevalence of tanning in New Jersey has begun to decrease among all youths younger than the legal tanning age and among female students of legal age in the 5 years after a statewide tanning ban. These findings provide valuable evidence to policy makers to support ongoing state-level efforts to enact age-specific bans on indoor tanning. The unique assessment of tanning location demonstrates the need for both greater enforcement of existing tanning salon regulations to ensure compliance and broadening restrictions to cover nonsalon tanning locations.

Evaluation of Indoor Tanning Facilities in American Fitness Centers.

BACKGROUND: Indoor tanning (IT) in fitness facilities encourages a misleading positive relationship between tanning and health. While IT in Canadian fitness facilities has been studied, American literature regarding this topic is lacking. OBJECTIVES: The objective of this study is to evaluate availability, cost, reported risks, and adherence to legislation of IT in American fitness clubs. METHODS: This was a cross-sectional study utilizing a telephone questionnaire to survey gyms across all 50 states. The key term "fitness club" was searched in the Yellow Pages and 20 facilities from each state were randomly included into the study. Data were described descriptively and Pearson χ2 tests were used to compare IT prevalence and rates of noncompliance between population groups. Regression analysis examined potential relationship between cost and prevalence of IT. RESULTS: Of the 1000 fitness clubs surveyed, 44.4% (444/1000) offered IT. The overall noncompliance rates for age, rest time, and eye protection were 13.8% (54/390), 26.0% (20/77), and 27.8% (85/225), respectively. The most common risk reported was skin cancer (61.6%), but many facilities were unsure of risks (27.0%) and some described no risk associated with IT (3.2%). The average cost for monthly unlimited tanning was 33 ± 13.96 USD. A state-to-state comparison showed a statistically significant inverse relationship between mean cost and prevalence of IT (P = .013, [r]= -0.35). CONCLUSION: The prevalence and noncompliance rates of IT in fitness clubs contradict the healthy lifestyles they are working to promote. To limit harms, legislations should be standardized and more strictly enforced. Additionally, public education on IT risks and the use of higher costs may help minimize IT use.

Impact of Sun Exposure and Tanning Patterns on Next-Generation Sequencing Mutations in Melanoma.

BACKGROUND: For the past 30 y, the incidence rate of malignant melanoma has risen steadily. Ultraviolet radiation exposure has been identified as the most prevalent modifiable risk factor for melanoma. Here, next-generation sequencing was used to analyze the relationship between multiple sun exposure factors and select cancer-related genes to determine the relationship of sun exposure on the molecular profiles of melanomas. METHODS: The collection and analysis of study samples were approved by the institutional review board. The patient cohort consisted of 173 patients whose melanoma tissue samples underwent next-generation sequencing analysis for somatic mutations of 50 cancer-related genes. Univariate and multivariate analyses were conducted. RESULTS: Patients with a history of blistering sunburn had an absolute mutation incidence of 1.67 mutations per patient, compared with patients without a history of blistering sunburn, who had an absolute mutation incidence of 1.16 mutations per patient (P = 0.028). A BRAF mutation was found in more tumors of patients who reported visiting a tanning salon (57.14%), compared with those who had not (18.75%; P = 0.0463). Patients with a previous history of skin cancer were more likely to have a CDKN2A mutation (20.83%), compared with those without a previous history of skin cancer (7.76%; P = 0.0292). CONCLUSIONS: The trends seen in the molecular profiles of melanomas with respect to various sun exposure factors suggest that sun exposure impacts genetic makeup. Considering the increase in absolute mutation incidence in patients with a history of blistering sunburn suggests that additional genes may contribute to the pathology of malignancy. Future studies will use the unique molecular profiles of melanomas to personalize patient treatments.

Effect of a Face-Aging Mobile App-Based Intervention on Skin Cancer Protection Behavior in Secondary Schools in Brazil: A Cluster-Randomized Clinical Trial.

Importance: Because exposure to UV radiation early in life is an important risk factor for melanoma development, reducing UV exposure in children and adolescents is of paramount importance. New interventions are urgently required. Objective: To determine the effect of the free face-aging mobile app Sunface on the skin cancer protection behavior of adolescents. Design, Setting, and Participants: This cluster-randomized clinical trial included a single intervention and a 6-month follow-up from February 1 to November 30, 2018. Randomization was performed on the class level in 52 school classes within 8 public secondary schools (grades 9-12) in Itauna, Southeast Brazil. Data were analyzed from May 1 to October 10, 2019. Interventions: In a classroom seminar delivered by medical students, adolescents' selfies were altered by the app to show UV effects on their future faces and were shown in front of their class, accompanied by information about UV protection. Information about relevant parameters was collected via anonymous questionnaires before and 3 and 6 months after the intervention. Main Outcomes and Measures: The primary end point of the study was the difference in daily sunscreen use at 6 months of follow-up. Secondary end points included the difference in daily sunscreen use at 3 months of follow-up, at least 1 skin self-examination within 6 months, and at least 1 tanning session in the preceding 30 days. All analyses were predefined and based on intention to treat. Cluster effects were taken into account. Results: Participants included 1573 pupils (812 girls [51.6%] and 761 boys [48.4%]; mean [SD] age, 15.9 [1.3] years) from 52 school classes. Daily sunscreen use increased from 110 of 734 pupils (15.0%) to 139 of 607 (22.9%; P < .001) at the 6-month follow-up in the intervention group. The proportion of pupils performing at least 1 skin self-examination in the intervention group rose from 184 of 734 (25.1%) to 300 of 607 (49.4%; P < .001). Use of tanning decreased from 138 of 734 pupils (18.8%) to 92 of 607 (15.2%; P = .04). No significant changes were observed in the control group. The intervention was more effective for female students (number needed to treat for the primary end point: 8 for girls and 31 for boys). Conclusions and Relevance: These findings suggest that interventions based on face-aging apps may increase skin cancer protection behavior in Brazilian adolescents. Further studies are required to maximize the effect and to investigate the generalizability of the effects. Trial Registration: ClinicalTrials.gov Identifier: NCT03178240.

Skin Cancer and Skin Cancer Risk Factors in Sexual and Gender Minorities.

Sexual and gender minorities have unique risk factors that may increase their risk of developing skin cancer. In particular, sexual minority men report a higher prevalence of skin cancer (including both keratinocytes carcinomas and melanoma), higher rates of indoor tanning, and overall poorer sun protection behaviors. Sexual and gender minorities also have high rates of alcohol and tobacco use, and infection with human immunodeficiency virus and human papillomavirus, which may increase overall risk of developing skin cancer in these populations. In this review, we discuss the evidence surrounding skin cancer and associated risk factors among sexual and gender minorities.

Skin cancer and skin cancer risk behaviors among sexual and gender minority populations: A systematic review.

BACKGROUND: Individuals of sexual and gender minorities may have different lifetime risk of skin cancer and ultraviolet radiation exposure than heterosexual persons. OBJECTIVE: To systematically review the prevalence of skin cancer and behaviors that increase risk of skin cancer among sexual and gender minority populations. METHODS: We performed a systematic literature review in PubMed/MEDLINE, Embase, Cochrane, and Web of Science, searching for articles through October 18, 2019, that investigated risk of skin cancer and behaviors among sexual and gender minority populations. RESULTS: Sexual minority men have a higher lifetime risk of any skin cancer (odds ratio range: 1.3-2.1) and indoor tanning bed use (odds ratio range: 2.8-5.9) compared with heterosexual men, whereas sexual minority women may use indoor tanning beds less frequently than heterosexual women and do not have an elevated risk of lifetime history of skin cancer. Gender-nonconforming individuals have higher lifetime prevalence of any skin cancer compared with cisgender men. LIMITATIONS: Most variables rely on self-reporting in their original studies. CONCLUSIONS: Sexual minority men disproportionately engage in use of indoor tanning beds, which may result in increased lifetime risk of skin cancer. Recognition of this risk is important for providing appropriate screening for patients in this population.

Sun protection education for adolescents: a feasibility study of a wait-list controlled trial of an intervention involving a presentation, action planning, and SMS messages and using objective measurement of sun exposure.

BACKGROUND: People increase their risk of melanoma unless they are protected from the harmful effects of sun exposure during childhood and adolescence. We aimed to assess the feasibility of a three-component sun protection intervention- presentation, action planning, and SMS messages - and trial parameters. METHODS: This feasibility wait-list trial was conducted in the United Kingdom in 2018. Students aged 13-15 years were eligible. Feasibility outcomes were collected for recruitment rates; data availability rates for objective measurements of melanin and erythema using a Mexameter and self-reported sunburn occurrences, severity and body location, tanning, sun protection behaviours and Skin Self-Examination (SSE) collected before (baseline) and after the school summer holidays (follow-up); intervention reach, adherence, perceived impact and acceptability. Quantitative data were analysed using descriptive statistics; qualitative data were analysed thematically. RESULTS: Five out of eight schools expressing an interest in participating with four allocated to act as intervention and one control. Four parents/carers opted their child out of the study. Four hundred and eighty-seven out of 724 students on the school register consented to the study at baseline (67%). Three hundred and eighty-five were in intervention group schools. Objective skin measurements were available for 255 (66%) of the intervention group at baseline and 237 (61%) of the group at follow up. Melanin increased; erythema decreased. Complete self-report data were available for 247 (64%) students in the intervention group. The number of students on the school register who attended the presentation and given the booklet was 379 (98%) and gave their mobile phone number was 155 (40%). No intervention component was perceived as more impactful on sun protection behaviours. Adolescents did not see the relevance of sun protection in the UK or for their age group. CONCLUSIONS: This is the first study to use a Mexameter to measure skin colour in adolescents. Erythema (visible redness) lasts no more than three days and its measurement before and after a six week summer holiday may not yield relevant or meaningful data. A major challenge is that adolescents do not see the relevance of sun protection and SSE. TRIAL REGISTRATION: International Standard Randomised Controlled Trial Number ISRCTN11141528. Date registered 0/2/03/2018; last edited 31/05/2018. Retrospectively registered.

Association between financial links to indoor tanning industry and conclusions of published studies on indoor tanning: systematic review.

OBJECTIVE: To assess whether an association exists between financial links to the indoor tanning industry and conclusions of indoor tanning literature. DESIGN: Systematic review. DATA SOURCES: PubMed, Embase, and Web of Science, up to 15 February 2019. STUDY SELECTION CRITERIA: Articles discussing indoor tanning and health were eligible for inclusion, with no article type restrictions (original research, systematic reviews, review articles, case reports, editorials, commentaries, and letters were all eligible). Basic science studies, articles describing only indoor tanning prevalence, non-English articles, and articles without full text available were excluded. RESULTS: 691 articles were included in analysis, including empiric articles (eg, original articles or systematic reviews) (357/691; 51.7%) and non-empiric articles letters (eg, commentaries, letters, or editorials) (334/691; 48.3%). Overall, 7.2% (50/691) of articles had financial links to the indoor tanning industry; 10.7% (74/691) articles favored indoor tanning, 3.9% (27/691) were neutral, and 85.4% (590/691) were critical of indoor tanning. Among the articles without industry funding, 4.4% (27/620) favored indoor tanning, 3.5% (22/620) were neutral, and 92.1% (571/620) were critical of indoor tanning. Among the articles with financial links to the indoor tanning industry, 78% (39/50) favored indoor tanning, 10% (5/50) were neutral, and 12% (6/50) were critical of indoor tanning. Support from the indoor tanning industry was significantly associated with favoring indoor tanning (risk ratio 14.3, 95% confidence interval 10.0 to 20.4). CONCLUSIONS: Although most articles in the indoor tanning literature are independent of industry funding, articles with financial links to the indoor tanning industry are more likely to favor indoor tanning. Public health practitioners and researchers need to be aware of and account for industry funding when interpreting the evidence related to indoor tanning. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42019123617.

Melanoma Characteristics in Patients with a History of UV Tanning Bed Usage.

OBJECTIVE: The purpose of this study was to evaluate the effect of tanning bed use on the behavior of subsequent melanomas. METHODS: Cases of invasive cutaneous melanoma who completed a baseline questionnaire within 1 year of biopsy were ascertained using an institutional registry. Patients were categorized into one of two groups: (1) no history of UV tanning bed usage or (2) any history of tanning bed usage. Data analysis looked for group differences on the following variables: TNM staging, mitotic rate, family history of melanoma, and basic demographic variables. RESULTS: Among 141 cases, a higher percentage of women (48.28%) reported tanning bed usage compared to men (26.51%, P < .01). Additionally, the average age at biopsy for people who reported tanning bed usage was significantly lower compared to those who had not reported using a tanning bed. There was no significant difference in stage at presentation (P = .56). Those with tanning bed usage presented significantly less often with melanoma of unknown primary (MUP). After controlling for the effects of gender and nodal status, tanning bed usage was not a significant independent predictor of 5 year overall survival. CONCLUSIONS: If we remove the subject with MUP on the basis that more of these are mucosal in origin, lower TNM stage at presentation are found in patients with no tanning bed melanoma compared to those with history of tanning bed usage. In addition, tanning bed patients are younger and more likely female but with an equivalent mortality rate. LEVEL OF EVIDENCE: Case Series.

Patterns of sun safety behaviors in parents: Associations with physical activity, sedentary behavior, and access to neighborhood physical activity resources.

Exposure to ultraviolet rays is associated with increased risk of sunburn - a biomarker of skin cancer risk - and physical activity can increase exposure. Sun safety behaviors can mitigate the increased risk of skin cancer. The objective of this cross-sectional study was to determine associations between physical activity behaviors, access to neighborhood physical activity resources, and sunburn across different patterning of sun safety behaviors. Data collected in 2014 from parents in the United States were analyzed (N = 1680; 75% female, primarily between the ages of 35-44 and 45-59, and 67% White). Latent class analysis was conducted to identify classes of sun safety behaviors based on engagement in sun protective behaviors (wearing a hat, shirt with sleeves, and seeking shade) and sun exposure (tanning outdoors). The latent classes were then examined as moderators of the association between physical activity related variables and sunburn. Three classes were identified corresponding to Low, Moderate, and High Risk for sunburn. There was no evidence of moderation, so equality constraints were imposed across the classes. Moderate-to-vigorous physical activity (MVPA) (odds ratio [OR] = 1.09) and neighborhood environments favoring physical activity (OR = 1.39) were associated with an increased likelihood of sunburn. Greater engagement in physical activity and access to built environments that favour activity are associated with a higher likelihood of sunburn, regardless of sun safety behaviors. Physically active parents are a vulnerable population for melanoma, and cancer prevention efforts focused on physical activity should also address sun safety.

Attitudes and practice among dermatologists regarding indoor tanning.

The aim of this study was to explore dermatologists' practices and attitudes related to educating and counseling their adolescent patients about indoor tanning. An online survey was carried out with a convenience sample of 100 dermatologists. Findings indicated that the majority of the dermatologists are actively engaged in discussing tanning bed use and sun protection with their adolescent patients. Most expressed positive attitudes toward educating patients on the risks of tanning bed use. Limited time was the most commonly reported barrier for the lack of discussion regarding indoor tanning. Of note, more than half of the dermatologists (65%) had patients suffering from tanning addiction. For tanning-addicted patients, dermatologists can encourage lifestyle changes, the use of sunless tanning products, and referrals when the patient's needs extend beyond the scope of the dermatologist.

Fertility drugs and cutaneous melanoma risk: a French prospective cohort study.

Cutaneous melanoma has been suspected to be influenced by female sex hormones. A review of the literature in 2018 indicated that fertility drug (FD) use was associated with increased melanoma risk among parous women only. However, most studies so far were based on a retrospective design and the current evidence is unclear. We sought to prospectively investigate the associations between FD use and melanoma risk in women. E3N is a prospective cohort of 98 995 French women aged 40-65 years at inclusion in 1990. Information on use of FDs, including duration and time of administration, was assessed through self-administered questionnaires. We used Cox proportional hazards regression models adjusted for age and melanoma risk factors. Over 1990-2008, about 611 melanoma cases were ascertained among 86 653 women. Compared with never use, ever use of FDs was not associated with melanoma risk overall [hazard ratio (HR) = 1.15; 95% confidence interval (CI) = 0.75-1.74], or among parous women (HR = 1.08; 95% CI = 0.67-1.73). Among ever users of FDs, duration of use and age at first use were not associated with melanoma risk. Associations were similar after adjustment for UV exposure, although FD users were more likely to report tanning bed use than never-users (odds ratio = 1.50; CI = 1.01-2.22) in a subsample with recreational UV exposure data. Our data do not support an association between FD use and melanoma risk, but underlie the importance of taking into consideration potential confounding from sun exposure in future research.

Association of Lifetime Indoor Tanning and Subsequent Risk of Cutaneous Squamous Cell Carcinoma.

Importance: No study, to our knowledge, has prospectively investigated a dose-response association between lifetime indoor tanning and risk of cutaneous squamous cell carcinoma (SCC). Objective: To investigate the dose-response association between lifetime indoor tanning and SCC risk, the association between duration of use and age at initiation with SCC risk, and the association between age at initiation and age at diagnosis. Design, Setting, and Participants: This cohort study included data from women born from 1927 to 1963 from the Norwegian Women and Cancer study, established in 1991 with follow-up through December 31, 2015. Baseline questionnaires were issued to participants from 1991 to 2007, with follow-up questionnaires given every 5 to 7 years. Data analysis was performed from January 2, 2018, to March 2, 2019. Exposures: Participants reported pigmentation factors. Sunburns, sunbathing vacations, and indoor tanning were reported for childhood, adolescence, and adulthood. Main Outcomes and Measures: Information on all cancer diagnoses and dates of emigration or death were obtained through linkage to the Cancer Registry of Norway, using the unique personal identification number of Norwegian citizens. Results: A total of 159 419 women (mean [SD] age at inclusion, 49.9 [8.3] years) were included in the study. During follow-up (mean [SD], 16.5 [6.4] years), 597 women were diagnosed with SCC. Risk of SCC increased with increasing cumulative number of indoor tanning sessions. The adjusted hazard ratio (HR) for highest use vs never use was 1.83 (95% CI, 1.38-2.42; P < .001 for trend). A significantly higher risk of SCC was found among women with 10 years or less of use (HR, 1.41; 95% CI, 1.08-1.85) and more than 10 years of use (HR, 1.43; 95% CI, 1.16-1.76) and among women with age at initiation of 30 years or older (HR, 1.36; 95% CI, 1.11-1.67) and younger than 30 years (HR, 1.51; 95% CI, 1.18-1.92) vs never users. No significant association was found between age at initiation and age at diagnosis (estimated regression coefficient, -0.09 [95% CI, -1.11 to 0.94] for age at initiation of ≥30 years and -0.02 [95% CI, -1.27 to 1.22] for <30 years vs never use). Conclusion and Relevance: The findings provide supporting evidence that there is a dose-response association between indoor tanning and SCC risk among women. The association between cumulative exposure to indoor tanning and SCC risk was the same regardless of duration of use and age at initiation. These results support development of policies that regulate indoor tanning.

Optimistically biased perception of one's own skin cancer risk: Representative nationwide findings.

BACKGROUND: Previous research has shown that individuals tend to have unrealistic comparative optimism (UCO) for different diseases and health outcomes. Our aim was to analyze UCO in relation to skin cancer for the first time in a representative nationwide sample. The results will be important for planning future prevention. METHODS: The National Cancer Aid Monitoring on Sunbed Use (NCAM, wave 3) is a representative nationwide German survey (n = 3,000, 14-45 years). We assessed UCO in relation to skin cancer and analyzed its association with sociodemographics, tanning and health-related risk behaviors, skin cancer risk, and skin cancer risk awareness. RESULTS: Four out of ten (43.3 %) respondents believed themselves to have a lower risk of developing skin cancer than other people of the same age and sex. Younger individuals were more likely to be optimistic. Individuals with an increased risk of skin cancer were more likely to perceive this higher risk. CONCLUSION: While it is realistic for those who actually have a higher risk of skin cancer to perceive it that way, the findings for the general population (and specifically for younger individuals) are concerning. It seems important to explain to people that their perception of their own risk of skin cancer is unrealistic, as this may affect their individual screening and prevention behavior.