David L. O'Riordan

Measures of Sun Exposure and Sun Protection Practices for Behavioral and Epidemiologic Research

OBJECTIVE To develop, in a collaborative project, core measures of sun exposure and sun protection habits, since the lack of standard outcome measures hampers comparison of population surveys and interventions used in skin cancer prevention research. DESIGN A work group of investigators evaluated available questionnaire measures of sun exposure and protection. Their deliberations led to a proposed set of core questionnaire items for adults, adolescents aged 11 to 17 years, and children 10 years or younger. These core items were used in cognitive testing by the investigators. Cross-site summaries of methods, response samples, and descriptive data were prepared. SETTING Nine locations across the United States. PARTICIPANTS The study population comprised 81 individuals. RESULTS No unusual response patterns were detected in any of the respondent groups or for any specific question. Some revisions to the survey items resulted from the need for clarification or emphasis of frames of reference such as adding or underlining key phrases in a question. CONCLUSIONS The combination of expert review followed by cognitive interviewing yielded standardized core survey items with good clarity and applicability for measuring sun exposure and sun protection behaviors across a broad range of populations. They are appropriate for studies tracking morbidity and/or mortality and evaluating prevention program effects.

Validity of Self-Reported Sunscreen Use by Parents, Children, and Lifeguards

BACKGROUND Verbal self-report is the method most often used to assess sunscreen use, but the data may be confounded by recall error and social desirability. Sunscreen swabbing is a non-invasive procedure to objectively assess the presence of sunscreen on the skin. This study examined the agreement between verbal reports of sunscreen use from survey and diary measures and objectively measured sunscreen use. METHODS Participants were 564 parents, children aged 5-10 years, and lifeguards at 16 swimming pools in four regions of the U.S. Participants completed self-reported measures, including baseline and final surveys, as well as a 4-day diary and objective swabbing measures of sunscreen presence on 2 separate days. Data were collected in 2006 and analyzed in 2006-2007. RESULTS Levels of sunscreen use were relatively high based on surveys (65.7%); diary data (40.3%); and swabbing measures (59.1%). Agreement between swabbing and diary measures of sunscreen use was fair to good, with kappa statistics for children at 0.40, followed by lifeguards at 0.34 and parents at 0.27. Validity coefficients across measures of sunscreen use were higher for lifeguards and parents than for children, and diary measures were higher than surveys. No systematic errors were found across groups or by gender, latitude, study arm, or risk category. CONCLUSIONS These findings are comparable to those in other validation studies, including studies of the validity of dietary assessments. Self-reported estimates of sunscreen use by diaries or surveys appear to be as good as objective measures.

Validity of Self-reported Solar UVR Exposure Compared with Objectively Measured UVR Exposure

Background: Reliance on verbal self-report of solar exposure in skin cancer prevention and epidemiologic studies may be problematic if self-report data are not valid due to systematic errors in recall, social desirability bias, or other reasons. Methods: This study examines the validity of self-reports of exposure to ultraviolet radiation (UVR) compared to objectively measured exposure among children and adults in outdoor recreation settings in 4 regions of the United States. Objective UVR exposures of 515 participants were measured using polysulfone film badge UVR dosimeters on 2 days. The same subjects provided self-reported UVR exposure data on surveys and 4-day sun exposure diaries, for comparison to their objectively measured exposure. Results: Dosimeter data showed that lifeguards had the greatest UVR exposure (24.5% of weekday ambient UVR), children the next highest exposures (10.3% ambient weekday UVR), and parents had the lowest (6.6% ambient weekday UVR). Similar patterns were observed in self-report data. Correlations between diary reports and dosimeter findings were fair to good and were highest for lifeguards (r = 0.38–0.57), followed by parents (r = 0.28–0.29) and children (r = 0.18–0.34). Correlations between survey and diary measures were moderate to good for lifeguards (r = 0.20–0.54) and children (r = 0.35–0.53). Conclusions: This is the largest study of its kind to date, and supports the utility of self-report measures of solar UVR exposure. Impact: Overall, self-reports of sun exposure produce valid measures of UVR exposure among parents, children, and lifeguards who work outdoors. Cancer Epidemiol Biomarkers Prev; 19(12); 3005–12. ©2010 AACR.

Diffusion of an effective skin cancer prevention program: design, theoretical foundations, and first-year implementation.

This article describes the design and theoretical foundations of the Pool Cool Diffusion Trial and reports 1st-year findings. Aims of the study are to evaluate the effects of 2 strategies for diffusion of the Pool Cool sun safety program on implementation, maintenance, and sustainability; improvements in environmental supports for sun safety in swimming pools; and sun protection habits and sunburn among participating children. There was a high rate of program participation (86.6%; n=375 swimming pools) in the 1st year and somewhat lower study participation (75.8%). Analysis of pool manager surveys revealed a time effect for overall sun safety programs and for sun safety policies, environmental strategies, and programs for pool users. There were few differences in implementation between treatment groups in year one.

Correlations between Reported and Measured Ultraviolet Radiation Exposure of Mothers and Young Children

Abstract Cumulative and intermittent sun exposure are risk factors for skin cancer, highlighting the need to monitor exposure during childhood. There is currently very little available information concerning the accuracy of self-reported levels of sun exposure, particularly for very young children. In this study, UV radiation (UVR) exposure measured by polysulfone dosimeters worn on the wrist was compared with a measure of estimated exposure using a diary based on recall at the end of the 4 day study period and ambient dosimetric measures. Results of the study indicate that the relative UVR exposures expressed as a fraction of daily total ambient received during the 4 day period by young children and mothers are similar. A high level of association was obtained for the estimated levels of exposure between young children and their mothers. Moderate correlations were evident for dosimeter readings of mother and child on weekends with no significant association on weekdays. The association between estimated exposure and dosimeter readings was poor and needs improvement. This may be achieved by greater consideration of structural and environmental factors that influence the levels of UVR exposure received by individuals and by increasing the level of specificity in the measurement instruments. Methodological issues such as recall of exposure after several days, quantity of sun exposure and more precise measurement of grades of exposure when outside may have more impact than previously expected, and further information is being sought with a larger sample for exposure during the summer months.

A day at the beach while on tropical vacation: sun protection practices in a high-risk setting for UV radiation exposure.

OBJECTIVE To conduct an assessment of levels of UV radiation (UVR) exposure and the range of sun protection behaviors of beachgoers at a popular vacation destination. DESIGN Participants completed the sun habits survey prior to entry to the beach and completed an exit survey on leaving regarding their sun protection practices while at the beach. Ambient UVR was monitored using polysulfone dosimeters. SETTING A popular beach for vacationers in Honolulu, Hawaii. MAIN OUTCOME MEASURES Sun protection practices and UVR. RESULTS Participants spent an average of 3 hours at the beach and received an estimated UVR dose of 10.4 standard erythemal doses. Latent class analysis identified 3 homogeneous classes with distinct characteristics and sun protection behaviors. Those in class 1 (unconcerned and at low risk) were at least risk of skin cancer, intended to tan, and used the least amount of sun protection. Those in class 2 (tan seekers) had the second highest risk of skin cancer, had the highest proportion of women, became sunburned easily, intended to tan, had used tanning beds in past 30 days, and had the highest proportion of sunscreen coverage and the least clothing coverage. Those in class 3 (concerned and protected) had the highest skin cancer risk, the highest proportion of clothing coverage and shade use, and were more likely to be residents of Hawaii. CONCLUSIONS Beachgoers were exposed to 5 times the UVR dose required to result in erythema among unprotected fair-skinned populations. Latent class analysis was effective in identifying subgroups of beachgoers who would benefit from targeted, population-based interventions aimed at reducing skin cancer risks while enjoying outdoor leisure-time activities.

Longitudinal assessment of symptom severity among hospitalized elders diagnosed with cancer, heart failure, and chronic obstructive pulmonary disease†

BACKGROUND Pain, dyspnea, and anxiety are common among patients with cancer, heart failure (HF), and chronic obstructive pulmonary disease (COPD), yet little is known about the severity of symptoms over time. OBJECTIVE To determine the prevalence, severity, burden, and predictors of symptoms during the course of hospitalization and at 2 weeks after discharge. DESIGN A prospective cohort study. SETTING A large academic university. PATIENTS Patients were 65 years or older with a primary diagnosis of cancer, COPD, or HF. MEASUREMENTS Daily living skills and depression were recorded at enrollment. Symptoms were assessed daily and 2 weeks postdischarge. RESULTS At baseline, most participants reported moderate/severe pain (54%), dyspnea (53%), and anxiety (62%). Almost two-thirds (64%) had 2 or more symptoms at a moderate/severe level. The prevalence of moderate/severe symptoms decreased at the 24-hour assessment (pain = 42%, dyspnea = 45%, anxiety = 55%, burden = 55%) and again at follow-up (pain = 28%, dyspnea = 27%, anxiety = 25%, burden = 30%). While there was no association between primary diagnosis and symptom severity at baseline or 24-hour assessment, at 2-week follow-up, a higher percentage of patients with COPD had moderate/severe pain (54%, χ(2) = 22.0, P = 0.001), dyspnea (45%, χ(2) = 9.3, P = 0.05), and overall symptom burden (55%, χ(2) = 25.9, P = 0.001) than those with cancer (pain = 22%, dyspnea = 16%, symptom burden = 16%) or HF (pain = 25%, dyspnea = 24%, symptom burden = 28%). Predictors of symptom burden at follow-up were COPD (odds ratio [OR] = 7.5; 95% confidence interval [CI] = 2.0, 27.7) and probable depression (OR = 6.1; 95% CI = 2.1, 17.8). CONCLUSION The majority of inpatients with chronic illness reported high severity of symptoms. Symptoms improved over time but many patients, particularly those with COPD, had high symptom severity at follow-up.

Validity of covering-up sun-protection habits: Association of observations and self-report

BACKGROUND Few studies have reported the accuracy of measures used to assess sun-protection practices. Valid measures are critical to the internal validity and use of skin cancer control research. OBJECTIVES We sought to validate self-reported covering-up practices of pool-goers. METHODS A total of 162 lifeguards and 201 parent/child pairs from 16 pools in 4 metropolitan regions in the United States completed a survey and a 4-day sun-habits diary. Observations of sun-protective behaviors were conducted on two occasions. RESULTS Agreement between observations and diaries ranged from slight to substantial, with most values in the fair to moderate range. Highest agreement was observed for parent hat use (kappa = 0.58-0.70). There was no systematic pattern of over- or under-reporting among the 3 study groups. LIMITATIONS Potential reactivity and a relatively affluent sample are limitations. CONCLUSION There was little over-reporting and no systematic bias, which increases confidence in reliance on verbal reports of these behaviors in surveys and intervention research.

Raising sun protection and early detection awareness among Florida high schoolers.

Abstract:  Changing adolescents’ sun protection behaviors remains a challenge, and the need for effective interventions targeting this group is a priority, particularly in warmer climates where emphasis on appropriate sun protection remains a year‐round concern. However, there has been little prospective research on the effect of school‐based sun protection interventions, particularly on adolescents, especially teens aged 15 to 18. High school science students in Palm Beach County, Florida, received a seven‐lesson sun protection and early detection curriculum preceded by pretests and followed with post‐tests 6 months later. The main outcome measures were student knowledge and sun protection practices, including adherence to sunscreen recommendations. Of 344 students completing the baseline surveys, 184 students completed the postintervention questionnaire. Overall, there were significant improvements from baseline to follow‐up for many of the knowledge questions. Greatest change scores were seen in the childrens ability to correctly define the five rules of early detection of skin cancer (27–60%, p < 0.001) with improved change scores by gender and race persisting after 6 months. No significant differences were found in reported use of sunscreen, hat wearing, or sunglasses, although there was a slight decrease in the reported use of always wearing sun protective clothing (p = 0.03). In conclusion, in this study, a skin cancer prevention and detection curriculum integrated into high school biology, resulted in knowledge gains maintained at least 6 months after classroom teaching. For example, procedural knowledge (e.g., knowing ways to identify early malignant moles) obtained in this study improved in 6 months, and may lay the foundation for future behavioral change. Sun protection activities in the United States have met with many challenges and obstacles and thus, further work is needed to better understand what combination of knowledge‐based information, activity‐based education, school‐wide changes, and community efforts, will create a long‐term systemic improvement in sun protection habits in children.

Sun Protection Policies and Practices at Child Care Centers in Massachusetts

We assessed the relationship between sun protection policies and practices at child care centers in Massachusetts. We hypothesized that centers with sun protection policies were more likely to have regular sun protection practices in place compared to centers without these policies. We conducted a telephone survey with directors or assistant directors at 327 child care centers during the summer of 2002. The main outcome measure was sun protection practices, which included time spent outside during mid-day and the use of sunscreen, hats, and protective clothing by the majority of children assessed over the last 5 program days. The 36-item survey also inquired about the center’s sun protection policy and included demographic questions. Most centers (73%) reported having a written sun protection policy. Sun protection policies were positively associated with reported sunscreen (χ2=14.63, p = 0.0001) and hat use (χ2=30.98, p < 0.0001) and inversely associated with time outside (χ2=10.76, p = 0.001). Seventy-seven percent of centers followed recommended sunscreen practices. However, centers were far less likely to have recommended hat use (36%) and protective clothing (1.5%) practices. A formal sun protection policy may be an effective way to increase sun protection practices in the child care setting. Further research should assess this relationship in other states. Improving and expanding existing state regulations may be a reasonable strategy to increase sun protection at child care centers.