Preventing Skin Cancer: Education and Policy Approaches in Outdoor Occupational Settings - ARCHIVED

Eight studies qualified for the review.

• Only two studies measured key behavioral or health outcomes.
• Effects on attitudes or beliefs were inconsistent (5 studies).

These results are based on a systematic review of all available studies led by scientists from CDC’s Division of Cancer Prevention and Control with input from a team of specialists in systematic review methods and experts in research, practice and policy related to preventing skin cancer.

Each Community Preventive Services Task Force (Task Force) review identifies critical evidence gaps—areas where information is lacking. Evidence gaps can exist whether or not a recommendation is made. In cases when the Task Force finds insufficient evidence to determine whether an intervention strategy works, evidence gaps encourage researchers and program evaluators to conduct more effectiveness studies. When the Task Force recommends an intervention, evidence gaps highlight missing information that would help users determine if the intervention could meet their particular needs. For example, evidence may be needed to determine where the intervention will work, with which populations, how much it will cost to implement, whether it will provide adequate return on investment, or how users should structure or deliver the intervention to ensure effectiveness. Finally, evidence may be missing for outcomes different from those on which the Task Force recommendation is based.

Identified Evidence Gaps

Design and Analysis Considerations

• All of the designs included in this review have important strengths and weaknesses.
• Additional diverse approaches are worth pursuing, in terms of study design and execution, and with attention both to internal and external validity.
• Consistently rigorous analytic methods are needed, and future studies should control for relevant confounders, such as risk levels and weather conditions.

Description of Target Population and Context

• Several reports in this area of research did not contain basic descriptions of the intervention or population.
• In many instances, the distribution of the population by race and ethnicity or sun sensitivity was not described.
• Many of the settings could have been better described.
• Better descriptions are needed of annual UV exposure in the places in which studies were conducted.
• Better descriptions of these important issues would help assess the likely applicability of the findings or explain any variability of effects.

Description of Intervention

• It was difficult to disentangle what specific intervention components were, or how much emphasis there was on primary prevention (versus early detection) or on promoting use of sunscreen versus on covering-up or sun-avoidance behaviors.
• Further information is needed on which attributes of the interventions contribute most to intervention effectiveness or ineffectiveness (e.g., do policy components or education components contribute more to intervention effectiveness; what are the central "active ingredients" in complex interventions).
• Describing intervention characteristics in greater detail might also help practitioners replicate successes.

Duration of Interventions and Length of Follow up

• Given the seasonality of sun-protective behaviors and the importance of encouraging habitual as opposed to short-term behavior change, a longer follow-up is crucial.

Intervention Quality

• An encouraging trend can be seen in increasing use of formative research and pre-testing of interventions before they are implemented.
• Mediating factors deserve greater attention and need to be correlated with behavior changes. To date, few studies in this area of research have reported on both mediating factors and behavioral or health outcomes.
• A need also exists to develop measures of the effects of environmental and policy change strategies. Few interventions addressed policy or environmental changes and in those that did, the effects of the policy or environmental components could not be disentangled from other aspects of the intervention.

Measurement of Exposure

• Few studies reported process evaluation data, which can help to assess how much of the intervention was actually implemented.
• Improvement in this area would be helpful, especially for interventions of longer duration and increased complexity.

Measurement of Outcomes

• More behavioral and health outcomes need to be examined.
  • Given recent concerns about the adequacy of sunscreen as a sole protective strategy, additional behavioral and health outcomes should also be measured.
  • Outcomes need to be similar to evaluate effectiveness.
  • Measurement of specific sun-protective behaviors is important.
  • More interventions with a greater focus on covering up and sun- avoidance, and a decreased emphasis on sunscreen use are needed.
• Given recent research findings on the effectiveness of sunscreens, more detailed research on sunscreen use is needed.
  • Are higher SPF sunscreens being used?
  • Does sunscreen use extend the amount of time out in the sun?
• How do different sun-protective behaviors interact (e.g., does seeking shade make wearing sunscreen or a hat unnecessary)?
• Further work is needed to increase consistency between at least a core set of behavior change measures that can be used to compare and contrast study results.

Research Needs and Work in Progress

The field of behavior change for skin cancer prevention has progressed significantly, but important areas for further advancement exist. As outlined above, these include design, measurement, better description of interventions, development of a better understanding of how environmental and policy interventions work, and studies in multiethnic populations. The use of new communication technology and international collaborations can make significant contributions in these areas. The team hopes that the availability of systematic reviews that identify both progress to date and the remaining gaps will help to reduce the gaps in available research.

• Specific Research Issues. Although most of the evidence gaps described above were general and could explain why most setting specific categories did not produce sufficient evidence to determine effectiveness, a few research issues were specific to the setting or target group.

• Interventions for Secondary Schools. More studies are needed to examine sun-protective behaviors of adolescents and young adults, and to determine what kind of approach might work best in this population, especially given the low baseline prevalence of sun-protective behaviors.

• Interventions in Occupational Settings. Studies that target the most common outdoor occupational workers—mail carriers, agricultural workers, landscapers, horticulturists, foresters, construction workers, telephone line workers, commercial fishery workers, land surveyors and mappers, oil field workers, amusement park attendants, and athletes—are needed.

• Interventions in Healthcare Settings. Almost all studies in this category examined the counseling behavior of the provider and not the patient. More studies that examine the behavioral or health outcome of the end user—the patient—are needed. In this small subset of studies, the provider was most often a physician or a physician-in-training, but studies examining the role of the nonphysician provider would help identify whether counseling skills to change behavior might be better suited for providers with the time and skills, such as a nurse or a health educator. Additionally, more studies are needed to examine healthcare system studies oriented directly to patients.

• Interventions for Parents and Caregivers. Studies are needed to examine the effect of interventions on nonparental caregivers, as it is becoming increasingly common for children to be cared for by nonparental caregivers while both parents are at work outside the home.

• Interventions in Multicomponent Community Settings. Approaches to better define the "active ingredients" (i.e., the most important components that contribute to the success of these interventions) would be helpful, as would determining the applicability of these interventions to the U.S. population.

Evidence Review

Saraiya M, Glanz K, Briss PA, et al. Interventions to prevent skin cancer by reducing exposure to ultraviolet radiation: a systematic review.  [PDF - 807 kB] Am J Prev Med2004;27(5):422-66.