American Journal of Epidemiology Advance Access originally published online on November 10, 2008
American Journal of Epidemiology 2009 169(1):41-53; doi:10.1093/aje/kwn289
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ORIGINAL CONTRIBUTIONS |
Study of Nevi in Children (SONIC): Baseline Findings and Predictors of Nevus Count
Correspondence to Dr. Susan A. Oliveria, Dermatology Service, Memorial Sloan-Kettering Cancer Center, 160 East 53rd Street, New York, NY 10022 (e-mail: oliveri1{at}mskcc.org).
Received for publication November 12, 2007. Accepted for publication August 15, 2008.
The authors report baseline findings and predictors of nevus count (log total nevi) at the completion of year 1 (2004) of the first known population-based, prospective study of nevi in a US cohort of children. Overall, 64% (n = 443/691) of grade 5 students and their parents in Framingham, Massachusetts, completed surveys and underwent digital photography. Total nevus count was associated with skin and hair color and tendency to burn, as measured by a sun sensitivity index. In multivariate analyses, male gender (rate ratio (RR) = 1.38, 95% confidence interval (CI): 1.22, 1.55; P < 0.0001), spending 5–6 weekly hours outdoors between 10 AM and 4 PM (RR = 1.13, 95% CI: 1.00, 1.28; P = 0.051), getting a painful sunburn once (RR = 1.24, 95% CI: 0.98, 1.57; P = 0.073) and at least twice (RR = 1.34, 95% CI: 0.99, 1.82; P = 0.061), and wearing a shirt at the beach or pool rarely (RR = 1.29, 95% CI: 1.08, 1.54; P = 0.005), sometimes (RR = 1.26, 95% CI: 1.01, 1.57; P = 0.041), and often and always (RR = 1.32, 95% CI: 1.13, 1.54; P = 0.001) were associated with increased number of nevi. Identifying factors that predict the development of nevi will improve primary prevention efforts during early life.
adolescent; child; environmental exposure; longitudinal studies; melanoma; nevus; nevus, pigmented; sunburn
Abbreviations: SONIC, Study of Nevi in Children; SSI, sun sensitivity index