نتایج جستجو برای: sun exposure

تعداد نتایج: 338401  

2011

Sunlight sustains life on earth. Sunlight is essential for vitamin D synthesis in the skin. The sun’s ultraviolet rays can be hazardous, however, because excessive exposure causes skin cancer and other adverse health effects. Skin cancer is amajor public health problem;more than 2 million new cases are diagnosed in the United States each year. Ultraviolet radiation (UVR) causes the 3 major form...

2017
Ricardo Daniel García‐Sepúlveda Iraida Guadalupe Mesa‐Garza

We report the case of a man with a history of sun exposure and cigarette smoking and development of FavreRacouchot syndrome describing its characteristics and possible prevention. The patient is a 61yearoldman who presents at our clinic because of an asymmetric dermatosis on the left malar region that spread to the left back part of the nose and has evolved during the last 5 years. Physical exa...

2012
Abdulaziz Al-Othman Sara Al-Musharaf Nasser M Al-Daghri Soundararajan Krishnaswamy Deqa S Yusuf Khalid M Alkharfy Yousef Al-Saleh Omar S Al-Attas Majed S Alokail Osama Moharram Shaun Sabico George P Chrousos

BACKGROUND Accumulating evidence suggests an increased prevalence of vitamin D deficiency in the Middle East. In this context, we aimed to determine whether the prevalence of vitamin D deficiency is related to degree of physical activity and sun exposure among apparently healthy Saudi children and adolescents, a little studied population. METHODS A total of 331 Saudi children aged 6-17 years ...

Journal: :Current oncology reports 2013
Veronique Bataille

The association between various measures of sun exposure and melanoma risk is quite complex to dissect as many case-control studies of melanoma included different subtypes of melanomas which are likely to be biologically different, so interpretation of the data is difficult. Screening bias in countries with high levels of sun exposure is also an issue. Now that progress is being made in the gen...

Journal: :Journal of photochemistry and photobiology. B, Biology 2010
Johan Moan Asta Juzeniene

The Sun has played a major role in the development of life on Earth. In Western culture, people are warned against Sun exposure because of its adverse effects: erythema, photoimmunosuppression, photoageing, photocarcinogenesis, cataracts and photokeratitis. However, Sun exposure is also beneficial, since moderate doses give beneficial physiological effects: vitamin D synthesis, reduction of blo...

2017
Chi-Hsien Huang Yu-Tung Anton Huang Yu-Cheng Lai Cheuk-Kwan Sun

The prevalence of low vitamin D status in the elderly population of subtropical area and the potential risk/protective factors have not been addressed. This cross-sectional questionnaire-based study, which collected demographic/anthropometric data and information on diet habit and sun exposure, recruited 170 subjects with mean age 70.9±5.6 in rural areas of southern Taiwan. Serum 25-OH vitamin ...

2011
Sophie J. Balk

Sunlight sustains life on earth. Sunlight is essential for vitamin D synthesis in the skin. The sun’s ultraviolet rays can be hazardous, however, because excessive exposure causes skin cancer and other adverse health effects. Skin cancer is amajor public health problem;more than 2 million new cases are diagnosed in the United States each year. Ultraviolet radiation (UVR) causes the 3 major form...

2011

Sunlight sustains life on earth. Sunlight is essential for vitamin D synthesis in the skin. The sun’s ultraviolet rays can be hazardous, however, because excessive exposure causes skin cancer and other adverse health effects. Skin cancer is amajor public health problem;more than 2 million new cases are diagnosed in the United States each year. Ultraviolet radiation (UVR) causes the 3 major form...

Journal: :Canadian journal of public health = Revue canadienne de sante publique 2010
Erin C Pichora Loraine D Marrett

Childhood sun exposure is a particularly important determinant of skin cancer, yet little data are available for children. This paper describes sun behaviour among Canadian children for the summer of 2006. As part of the Second National Sun Survey (NSS2), 1,437 parents reported on the time spent in the sun, and the frequency of sun protection behaviours and sunburning for one of their children ...

Journal: :Rural and remote health 2009
M Saridi V Pappa I Kyriazis A Toska A Giolis A Liachapoulou E Skliros K Birbas

INTRODUCTION Extended sun exposure may lead to serious health problems, and evidence of this is in the increase in skin cancer and malignant melanoma worldwide. Extended sun exposure during childhood or adolescence increases the probability of skin cancer in adulthood. The aim of the study was to identify and examine the knowledge, attitude, behaviour and beliefs of Greek adolescents (high scho...

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