Significant Associations Between Sun Exposure and Adiposity Were Not Observed in Breast and Prostate Cancer Patients in a Cross‐sectional Analysis

Abstract

Obesity is a significant health problem worldwide. Exposure to low‐dose ultraviolet radiation (like that in sunlight) suppresses the development of obesity in mice; however, the nature of the associations between sun exposure and adiposity is not well understood in humans. The present study characterized cross‐sectional relationships between sun exposure and adiposity in a convenience cohort of breast (n = 269; mean age = 58 years) and prostate (n = 78; mean age = 69 years) cancer patients. Participants were enrolled in a 3‐month exercise program in Perth, Australia. Self‐reported questionnaires measured time spent outdoors (previous week, winter and summer), sex, age, treatment received and physical activity levels. Adiposity measures included body mass index, waist‐hip ratio and body fat percentage (measured via DXA). In unadjusted models, greater time spent outdoors across all times was significantly associated with lower waist‐hip ratio, while greater time spent outdoors in the last winter was associated with lower body fat percentage, but not when stratified by sex. There were no statistically significant associations between time spent outdoors and adiposity after adjusting for sex, age, treatments received and physical activity. Longitudinal studies in larger populations may elucidate significant associations not found in our study due to the cross‐sectional design and power limitations.

Hubungan Asupan Kalsium, Vitamin D, dan Paparan Sinar Matahari dengan Status Gizi pada Balita Usia 3-5 Tahun

“…Paparan sinar matahari dan persentase luas permukaan tubuh yang terpapar sinar matahari menunjukkan tidak terdapatnya hubungan signifikan dengan status gizi balita. Hal ini sejalan dengan penelitian di Australia oleh Zhang et al (2009) dimana tidak ditemukan hasil yang signifikan secara statistik antara waktu di luar ruangan dengan indeks kegemukan dikarenakan kurangnya subjek yang lebih beragam sehingga tidak dapat mewakili populasi pada umumnya dan adanya keterbatasan desain penelitian (Zhang et al, 2019). Pada penelitian lain di Rusia, wanita obesitas yang diberikan terapi paparan cahaya dengan intensitas 1.300 lux selama 3 minggu mengalami penurunan lemak tubuh, meskipun tidak ada penurunan berat badan (Kim et al, 2011).…”