BACKGROUND: The purpose of this study was to determine whether an inverse association exists between latitude, solar ultraviolet B (UVB) irradiance, modeled 25-hydroxyvitamin D [25(OH)D] levels and incidence rates of cancer of the brain. METHODS: Associations of latitude and UVB irradiance with age-standardized incidence rates of cancer of the brain were analyzed for 175 countries while controlling for proportion of population overweight, energy from animal sources, fish consumption, cigarette and alcohol consumption and per capita health expenditures, using multiple regression. Serum 25(OH)D levels were modeled for each country, and their association with brain cancer also was determined. RESULTS: The incidence rates of brain cancer were higher at higher latitudes (R(2) for males = 0.45, p ≤ 0.0001; R(2) for females = 0.35, p < 0.0001). After adjustment for potential confounders, UVB irradiance (p ≤ 0.0001) and modeled serum 25(OH)D were inversely associated with incidence rates. CONCLUSIONS: Countries with low solar UVB irradiance and estimated mean serum 25(OH)D levels generally had higher age-standardized incidence rates of brain cancer. Since this was an ecological study, further research would be worthwhile on the association of prediagnostic serum 25(OH)D with incidence rate in studies of cohorts of individuals.
BACKGROUND: The purpose of this study was to determine whether an inverse association exists between latitude, solar ultraviolet B (UVB) irradiance, modeled 25-hydroxyvitamin D [25(OH)D] levels and incidence rates of cancer of the brain. METHODS: Associations of latitude and UVB irradiance with age-standardized incidence rates of cancer of the brain were analyzed for 175 countries while controlling for proportion of population overweight, energy from animal sources, fish consumption, cigarette and alcohol consumption and per capita health expenditures, using multiple regression. Serum 25(OH)D levels were modeled for each country, and their association with brain cancer also was determined. RESULTS: The incidence rates of brain cancer were higher at higher latitudes (R(2) for males = 0.45, p ≤ 0.0001; R(2) for females = 0.35, p < 0.0001). After adjustment for potential confounders, UVB irradiance (p ≤ 0.0001) and modeled serum 25(OH)D were inversely associated with incidence rates. CONCLUSIONS: Countries with low solar UVB irradiance and estimated mean serum 25(OH)D levels generally had higher age-standardized incidence rates of brain cancer. Since this was an ecological study, further research would be worthwhile on the association of prediagnostic serum 25(OH)D with incidence rate in studies of cohorts of individuals.
Authors: Gabriella M Anic; Reid C Thompson; L Burton Nabors; L Burton Nabors; Jeffrey J Olson; James E Browning; Melissa H Madden; F Reed Murtagh; F Reed Murtagh; Peter A Forsyth; Kathleen M Egan Journal: Cancer Causes Control Date: 2012-06-28 Impact factor: 2.506
Authors: Carole A Baggerly; Raphael E Cuomo; Christine B French; Cedric F Garland; Edward D Gorham; William B Grant; Robert P Heaney; Michael F Holick; Bruce W Hollis; Sharon L McDonnell; Mary Pittaway; Paul Seaton; Carol L Wagner; Alexander Wunsch Journal: J Am Coll Nutr Date: 2015-06-22 Impact factor: 3.169
Authors: Igor Fischer; Hendrik-Jan Mijderwijk; Ulf D Kahlert; Marion Rapp; Michael Sabel; Daniel Hänggi; Hans-Jakob Steiger; Marie-Therese Forster; Marcel A Kamp Journal: Neurooncol Pract Date: 2020-06-06
Authors: Vidya Lakshmi Purushothaman; Raphael E Cuomo; Cedric F Garland; Timothy K Mackey Journal: BMC Public Health Date: 2021-07-05 Impact factor: 3.295