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Kallioğlu MA, Sharma A, Kallioğlu A, Kumar S, Khargotra R, Singh T. UV index-based model for predicting synthesis of (pre-)vitamin D3 in the mediterranean basin. Sci Rep 2024; 14:3541. [PMID: 38347060 PMCID: PMC10861575 DOI: 10.1038/s41598-024-54188-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 02/09/2024] [Indexed: 02/15/2024] Open
Abstract
The importance of solar radiation for the body's ability to synthesize Vitamin D3 is well documented, yet the precise amount of sun exposure required to avoid Vitamin D insufficiency is less clear. To address this knowledge gap, this study sought to utilize the sun in a suitable period at the optimum dose by utilizing numerical simulations to determine the amount of Vitamin D3 synthesis in the skin according to season, time of day, and geographical location in Turkey. The study was carried out in three stages; in the first stage, daily, monthly, and annual values were determined in cases where the solar zenith angle has the active UV-B wavelength. The second stage determined the level of Vitamin D that can be synthesized in all skin types at 25% solar radiation exposure. In the third stage, the sun exposure time required for 1000 International Units (IU) for all skin types was calculated. According to the analysis, the yearly period of active synthesis of D3 on Earth lasts from the beginning of March to the third week of October. During the day, it is between 10:00 and 16:00. For 1000 IU/day, the average annual estimated times (minutes) are 5.05 for Type I, 6.3 for Type II, 7.6 for Type III, 11.35 for Type IV, 15.15 for Type V, and 25.25 for Type VI. The results of this paper will impact awareness for academic-medical users.
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Affiliation(s)
| | - Ashutosh Sharma
- College of Science and Engineering, James Cook University, Townsville, QLD, 4810, Australia
| | - Ayşan Kallioğlu
- Department of Neurology, Faculty of Medicine, Cigli Research and Training Hospital, Izmir Bakırçay University, 8780, Çiğli - İzmir, Turkey
| | - Sunil Kumar
- Department of Nanotechnology and Advanced Materials Engineering and HMC, Sejong University, Seoul, 05006, South Korea
| | - Rohit Khargotra
- Institute of Materials Engineering, Faculty of Engineering, Pannonia University, Veszprem, 8200, Hungary.
- Sustainability Solutions Research Lab, University of Pannonia, Egyetem u. 10., Veszprém, 8200, Hungary.
| | - Tej Singh
- Savaria Institute of Technology, Faculty of Informatics, ELTE Eötvös Loránd University, Budapest, Budapest, 1117, Hungary
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2
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Schmalwieser AW, Lohr MA, Daly SM, Williams JD. Modeling acute and cumulative erythemal sun exposure on vulnerable body sites during beach vacations utilizing behavior-encoded 3D body models. PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES : OFFICIAL JOURNAL OF THE EUROPEAN PHOTOCHEMISTRY ASSOCIATION AND THE EUROPEAN SOCIETY FOR PHOTOBIOLOGY 2023; 22:1-20. [PMID: 36028652 DOI: 10.1007/s43630-022-00293-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 08/16/2022] [Indexed: 01/12/2023]
Abstract
Vacationers in a high-solar-intensity beach setting put themselves at risk of ultraviolet radiation (UV) over-exposure that can lead to acute and chronic health consequences including erythema, photoaging, and skin cancer. There is a current gap in existing dosimetry work on capturing detailed time-resolved anatomical distributions of UV exposure in the beach vacation setting. In this study, a radiative transfer model of the solar conditions of Tampa Bay, St. Petersburg, Florida, USA (27.8°N, 82.8°W) is combined with an in silico three-dimensional body model and data on typical beach vacation behaviors to calculate acute and cumulative body-site-specific UV exposure risk during a beach vacation. The resulting cumulative UV exposure calculated for a typical mix of clothing choices, settings, and activities during a week-long (7-day) beach vacation is 172.2 standard erythemal doses (SED) at the forearm, which is comparable with the average total annual UV exposure of European and North American residents and consistent with existing dosimetry studies. This model further estimates that vacationers choosing to spend a full day exclusively in the beach or pool setting can experience UV exposure in excess of 50 SED a day at multiple body sites. Such exposure indicates that significant sun protective measures would be required to prevent sunburn across all skin types in this setting. This work clarifies the significant role that beach vacations play in UV exposure and corresponding acute and cumulative health risks and highlights the importance of behavioral choices (including clothing, activity and photoprotection) as crucial factors in differentiating personal solar exposure risks.
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Affiliation(s)
- Alois W Schmalwieser
- Unit of Physiology and Biophysics, University of Veterinary Medicine, Veterinaerplatz 1, 1210, Vienna, Austria.
| | | | - Susan M Daly
- Johnson and Johnson Consumer Inc., Skillman, NJ, USA
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3
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Kondratyeva EI, Odinaeva ND, Klimov LY, Podchernyaeva NS, Ilenkova NI, Dolbnya SV, Zhekaite EK, Kuryaninova VA, Kotova YV, Tikhaya MI, Shitkovskaya EP, Bychina LV, Drepa TG, Zodbinova AE, Melyanovskaya YL, Petrova NV, Loshkova EV, Kutsev SI. Vitamin D Status Among Children With Juvenile Idiopathic Arthritis: A Multicenter Prospective, Non-randomized, Comparative Study. Front Pediatr 2022; 10:915943. [PMID: 35967569 PMCID: PMC9368197 DOI: 10.3389/fped.2022.915943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/06/2022] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is a chronic autoimmune disease characterized by destructive and inflammatory damage to the joints. The aim in this study was to compare vitamin D levels between children and adolescents, 1-18 years of age, with juvenile idiopathic arthritis (JIA) and a health control group of peers. We considered effects of endogenous, exogenous, and genetic factors on measured differences in vitamin D levels among children with JIA. METHODS Our findings are based on a study sample of 150 patients with various variants of JIA and 277 healthy children. The blood level of vitamin D was assessed by calcidiol level. The following factors were included in our analysis: age and sex; level of insolation in three regions of country (center, south, north); assessment of dietary intake of vitamin D; effect of prophylactic doses of cholecalciferol; a relationship between the TaqI, FokI, and BsmI polymorphisms of the VDR gene and serum 25(OH)D concentration. RESULTS We identified a high frequency of low vitamin D among children with JIA, prevalence of 66%, with the medial level of vitamin D being within the range of "insufficient" vitamin D. We also show that the dietary intake of vitamin D by children with JIA is well below expected norms, and that prophylactic doses of vitamin D supplementation (cholecalciferol) at a dose of 500-1,000 IU/day and 1,500-2,000 IU/day do not meet the vitamin D needs of children with JIA. Of importance, we show that vitamin D levels among children with JIA are not affected by clinical therapies to manage the disease nor by the present of VDR genetic variants. CONCLUSION Prophylactic administration of cholecalciferol and season of year play a determining role in the development of vitamin D deficiency and insufficiency.
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Affiliation(s)
- Elena I Kondratyeva
- Research Centre for Medical Genetics, Moscow, Russia.,Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
| | - Nuriniso D Odinaeva
- Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
| | | | | | - Natalya I Ilenkova
- Krasnoyarsk State Medical University Named After Professor V. F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | | | - Elena K Zhekaite
- Research Centre for Medical Genetics, Moscow, Russia.,Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
| | | | - Yuliya V Kotova
- Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
| | | | - Elena P Shitkovskaya
- Krasnoyarsk State Medical University Named After Professor V. F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Liubov V Bychina
- Krasnoyarsk State Medical University Named After Professor V. F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | | | | | - Yuliya L Melyanovskaya
- Research Centre for Medical Genetics, Moscow, Russia.,Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
| | | | - Elena V Loshkova
- Research Clinical Institute for Childhood of the Moscow Region, Moscow, Russia
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4
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Schmalwieser AW. Possibilities to estimate the personal UV radiation exposure from ambient UV radiation measurements. Photochem Photobiol Sci 2021; 19:1249-1261. [PMID: 32794538 DOI: 10.1039/d0pp00182a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
People are exposed to solar ultraviolet radiation (UVR) throughout their entire lives. Exposure to UVR is vital but also poses serious risks. The quantification of human UVR exposure is a complex issue. Personal UVR exposure is related to ambient UVR as well as to a variety of factors such as the orientation of the exposed anatomical site with respect to the sun and the duration of exposure. This is mainly determined by personal behaviour. A variety of efforts have been made in the past to measure or model the personal UVR exposure of people and often personal UVR exposure has been expressed as the percentage of ambient UVR. On the other hand, ambient UVR is being monitored at a variety of places and measurements are available even online. This suggests that both the knowledge of personal UVR exposure and measurements of ambient UVR is required. In this paper, a summary on the different methods, which use ambient UVR measurements to estimate personal UVR exposure of people, as well as a few examples, are given. Advantages and disadvantages will be discussed as well as possibilities and limitations. This also includes an overview of appropriate terminology, units and basic statistic parameters to describe personal UVR exposure.
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Affiliation(s)
- Alois W Schmalwieser
- Institute of Biophysics and Physiology, University of Veterinary Medicine, Vienna, Austria.
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5
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Maretzke F, Bechthold A, Egert S, Ernst JB, Melo van Lent D, Pilz S, Reichrath J, Stangl GI, Stehle P, Volkert D, Wagner M, Waizenegger J, Zittermann A, Linseisen J. Role of Vitamin D in Preventing and Treating Selected Extraskeletal Diseases-An Umbrella Review. Nutrients 2020; 12:nu12040969. [PMID: 32244496 PMCID: PMC7231149 DOI: 10.3390/nu12040969] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/14/2022] Open
Abstract
Evidence is accumulating that vitamin D may have beneficial effects on respiratory tract, autoimmune, neuro-degenerative, and mental diseases. The present umbrella review of systematic reviews (SRs) of cohort studies and randomised controlled trials (RCTs), plus single Mendelian randomisation studies aims to update current knowledge on the potential role of vitamin D in preventing and treating these extraskeletal diseases. Altogether, 73 SRs were identified. Observational data on primary prevention suggest an inverse association between vitamin D status and the risk of acute respiratory tract infections (ARI), dementia and cognitive decline, and depression, whereas studies regarding asthma, multiple sclerosis (MS), and type 1 diabetes mellitus (T1DM) are scarce. SRs of RCTs support observational data only for the risk of ARI. No respective RCTs are available for the prevention of chronic obstructive pulmonary disease (COPD), MS, and T1DM. SRs of RCTs indicate beneficial therapeutic effects in vitamin D-deficient patients with asthma and COPD, while effects on major depression and T1DM need to be further elucidated. Mendelian randomisation studies do not consistently support the results of SRs. Since several limitations of the included SRs and existing RCTs do not permit definitive conclusions regarding vitamin D and the selected diseases, further high-quality RCTs are warranted.
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Affiliation(s)
- Friederike Maretzke
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Angela Bechthold
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Sarah Egert
- Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany;
| | - Jana B. Ernst
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
| | - Debora Melo van Lent
- Glenn Biggs Institute for Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Sciences Center, San Antonio, TX 78229, USA;
| | - Stefan Pilz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria;
| | - Jörg Reichrath
- Department of Adult and Pediatric Dermatology, Venereology, Allergology, University Hospital Saarland, 66424 Homburg, Germany;
| | - Gabriele I. Stangl
- Institute for Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany;
| | - Peter Stehle
- Department of Nutrition and Food Sciences, University of Bonn, 53115 Bonn, Germany;
| | - Dorothee Volkert
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, 90408 Nuremberg, Germany;
| | - Michael Wagner
- Department for Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, 53127 Bonn, Germany;
| | - Julia Waizenegger
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
- Correspondence: ; Tel.: +49-228-3776-628
| | - Armin Zittermann
- Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, 32545 Bad Oeynhausen, Germany;
| | - Jakob Linseisen
- German Nutrition Society, 53175 Bonn, Germany; (F.M.); (A.B.); (J.B.E.); (J.L.)
- University Center of Health Sciences at Klinikum Augsburg (UNIKA-T), Ludwig Maximilian University of Munich, 86156 Augsburg, Germany
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6
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Religi A, Backes C, Chatelan A, Bulliard JL, Vuilleumier L, Moccozet L, Bochud M, Vernez D. Estimation of exposure durations for vitamin D production and sunburn risk in Switzerland. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2019; 29:742-752. [PMID: 30992519 DOI: 10.1038/s41370-019-0137-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 02/25/2019] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
Although overexposure to solar ultraviolet radiation (UVR) is responsible for cutaneous melanoma and epithelial skin cancer and can cause negative health effects such as sunburn, a "little and often" exposure regime is often suggested to produce naturally recommended vitamin D levels, being essential for skeletal health. This study aimed to quantify solar UV doses needed to trigger 1000 International Units (IU) vitamin D doses and, at the same time, producing sunburn in Switzerland. Solar UV erythema irradiance (in mW/m2) measured at four meteorological stations in Switzerland for the period 2005-2017 were used to evaluate effective solar UV radiation producing 1000 IU vitamin D doses in skin phototype II and III individuals. Daily solar UV exposure durations (in minutes) needed to produce vitamin D with limited sunburn risk were estimated while considering mean vitamin D food intake of the Swiss population and seasonal skin coverage. In summer and spring, with 22% of uncovered skin, 1000 IU vitamin D doses are synthesized in 10-15 min of sun exposure for adults. Exposure durations between erythema risk and 1000 IU vitamin D production vary between 9 and 46 min. In winter and autumn, the recommended vitamin D production without sunburn risks often unachievable, since up to 6.5 h of sun exposure might be necessary considering 8-10% of uncovered skin surface. The vitamin D food intake only represented 10% of the recommended vitamin D production and remained unchanged throughout the year. These findings might clarify why vitamin D deficiency is common in Switzerland. Moreover, exposure durations between recommended vitamin D and increased sunburn risk might only differ by few minutes. Without additional oral vitamin D supplementation, daily doses of vitamin D (1000 IU) are not reachable in autumn and winter months in Switzerland.
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Affiliation(s)
- A Religi
- Centre Universitaire d'Informatique (CUI), University of Geneva, Geneva, Switzerland.
| | - C Backes
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital (CHUV), 1010, Lausanne, Switzerland
- Institute for Work and Health, University of Lausanne and Geneva, 1010 Epalignes- Lausanne, Lausanne, Switzerland
| | - A Chatelan
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital (CHUV), 1010, Lausanne, Switzerland
| | - J-L Bulliard
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital (CHUV), 1010, Lausanne, Switzerland
| | - L Vuilleumier
- Federal Office of Meteorology and Climatology (MeteoSwiss), Payerne, Switzerland
| | - L Moccozet
- Centre Universitaire d'Informatique (CUI), University of Geneva, Geneva, Switzerland
| | - M Bochud
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital (CHUV), 1010, Lausanne, Switzerland
| | - D Vernez
- Institute for Work and Health, University of Lausanne and Geneva, 1010 Epalignes- Lausanne, Lausanne, Switzerland
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7
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Corradi E, Baczynska KA, Morelii M, Giulietti D, Khazova M. Method for Measurements of Terrestrial Ultraviolet Radiation on Inclined Surfaces in Personal Dosimetry Field Studies. Photochem Photobiol 2019; 95:1454-1460. [PMID: 31172526 DOI: 10.1111/php.13131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/25/2019] [Indexed: 12/25/2022]
Abstract
Understanding personal ultraviolet radiation (UVR) exposure is essential for the evaluation of the health risks and benefits; however, personal dosimetry could be challenging in large-scale or/and long-term population studies. Alternatively, personal exposure could be simulated using three-dimensional models and lifestyle surveys together with data on a body position with respect to the sun. These models require a real-time input on local environmental UVR. The main challenge in using this method is retrieval of the diffuse irradiance as it requires an often-expensive tracking of solar position. In this study, a hypothesis that UVR measured on a vertical plane in the north direction can be used in the UK as a proxy for diffuse radiation was tested against direct measurements and compared with models based on solar tracker data in Chilton, UK, (51.57°N) in June-July 2018. The statistical analysis over 17 days under all weather conditions showed that for 45° and 90° tilted surfaces the proposed method performed as well as the best of the models based on solar tracker data. A proposed system could offer a portable and low-cost alternative to measurements of diffuse radiation by solar tracking radiometers for spatial distribution of terrestrial erythema effective UVR in population field studies.
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Affiliation(s)
- Elena Corradi
- SiHealth, Didcot, UK.,Department of Physics, University of Pisa, Pisa, Italy
| | - Katarzyna A Baczynska
- Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, UK
| | | | | | - Marina Khazova
- Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, UK
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8
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Pilz S, Zittermann A, Trummer C, Theiler-Schwetz V, Lerchbaum E, Keppel MH, Grübler MR, März W, Pandis M. Vitamin D testing and treatment: a narrative review of current evidence. Endocr Connect 2019; 8:R27-R43. [PMID: 30650061 PMCID: PMC6365669 DOI: 10.1530/ec-18-0432] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/16/2019] [Indexed: 12/11/2022]
Abstract
Vitamin D testing and treatment is a subject of controversial scientific discussions, and it is challenging to navigate through the expanding vitamin D literature with heterogeneous and partially opposed opinions and recommendations. In this narrative review, we aim to provide an update on vitamin D guidelines and the current evidence on the role of vitamin D for human health with its subsequent implications for patient care and public health issues. Vitamin D is critical for bone and mineral metabolism, and it is established that vitamin D deficiency can cause rickets and osteomalacia. While many guidelines recommend target serum 25-hydroxyvitamin D (25[OH]D) concentrations of ≥50 nmol/L (20 ng/mL), the minimum consensus in the scientific community is that serum 25(OH)D concentrations below 25-30 nmol/L (10-12 ng/mL) must be prevented and treated. Using this latter threshold of serum 25(OH)D concentrations, it has been documented that there is a high worldwide prevalence of vitamin D deficiency that may require public health actions such as vitamin D food fortification. On the other hand, there is also reason for concern that an exploding rate of vitamin D testing and supplementation increases costs and might potentially be harmful. In the scientific debate on vitamin D, we should consider that nutrient trials differ from drug trials and that apart from the opposed positions regarding indications for vitamin D treatment we still have to better characterize the precise role of vitamin D for human health.
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Affiliation(s)
- Stefan Pilz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Armin Zittermann
- Clinic for Thoracic and Cardiovascular Surgery, Herz- und Diabeteszentrum NRW, Ruhr University Bochum, Bad Oeynhausen, Germany
| | - Christian Trummer
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Verena Theiler-Schwetz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Elisabeth Lerchbaum
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Martin H Keppel
- University Institute for Medical and Chemical Laboratory Diagnostics, Paracelsus Medical University, Salzburg, Austria
| | - Martin R Grübler
- Department of Cardiology, Swiss Cardiovascular Center Bern, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Winfried März
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
- Medical Clinic V (Nephrology, Hypertensiology, Rheumatology, Endocrinology, Diabetology), Medical Faculty Mannheim, Ruperto-Carola University of Heidelberg, Heidelberg, Germany
- Synlab Medical Center of Human Genetics Mannheim, Mannheim, Germany
| | - Marlene Pandis
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
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9
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Religi A, Backes C, Moccozet L, Vuilleumier L, Vernez D, Bulliard JL. Body Anatomical UV Protection Predicted by Shade Structures: A Modeling Study. Photochem Photobiol 2018; 94:1289-1296. [DOI: 10.1111/php.12949] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 05/25/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Arianna Religi
- Centre Universitaire d'Informatique (CUI); University of Geneva; Geneva Switzerland
| | - Claudine Backes
- Institute for Work and Health; University of Lausanne and Geneva; Lausanne Switzerland
- Centre Hospitalier Universitaire Vaudois (CHUV); University Institute of Social and Preventive Medicine; University of Lausanne; Lausanne Switzerland
| | - Laurent Moccozet
- Centre Universitaire d'Informatique (CUI); University of Geneva; Geneva Switzerland
| | - Laurent Vuilleumier
- Federal Office of Meteorology and Climatology; MeteoSwiss; Payerne Switzerland
| | - David Vernez
- Institute for Work and Health; University of Lausanne and Geneva; Lausanne Switzerland
| | - Jean-Luc Bulliard
- Centre Hospitalier Universitaire Vaudois (CHUV); University Institute of Social and Preventive Medicine; University of Lausanne; Lausanne Switzerland
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10
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Schmalwieser AW, Siani AM. Review on Nonoccupational Personal Solar UV Exposure Measurements. Photochem Photobiol 2018; 94:900-915. [PMID: 29856894 DOI: 10.1111/php.12946] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 05/25/2018] [Indexed: 01/22/2023]
Abstract
Solar ultraviolet (UV) radiation follows people during their whole life. Exposure to UV radiation is vital but holds serious risks, too. The quantification of human UV exposure is a complex issue. UV exposure is directly related to incoming UV radiation as well as to a variety of factors such as the orientation of the exposed anatomical site with respect to the sun and the duration of exposure. The use of badge-sensors allows assessing the UV exposure of differently oriented body sites. Such UV devices have been available for over 40 years, and a variety of measuring campaigns have been undertaken since then. This study provides an overview of those studies which reported measurements of the personal UV exposure (PE) during outdoor activities of people not related to their occupation. This overview is given chronologically to show the progress of knowledge in this research and is given with respect to different activities. Special focus is put on the ratio of personal exposure to ambient UV radiation. This ratio, when given as a function of solar elevation, allows estimating PE at any other location or date if ambient UV radiation is known.
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Affiliation(s)
- Alois W Schmalwieser
- Unit of Physiology and Biophysics, University of Veterinary Medicine, Vienna, Austria
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11
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Serrano MA. Contribution of sun exposure to the vitamin D dose received by various groups of the Spanish population. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:545-551. [PMID: 29156273 DOI: 10.1016/j.scitotenv.2017.11.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 11/03/2017] [Accepted: 11/03/2017] [Indexed: 06/07/2023]
Abstract
Although the harmful effects of excessive exposure to solar ultraviolet (UV) radiation are well known, the recommended dose of UV radiation is beneficial for the synthesis of vitamin D by the skin, in addition to being useful in the treatment of various illnesses and mental problems. Numerous studies have shown that vitamin D performs important functions in the human organism, such as absorbing calcium and phosphorous and contributing to the immune system, among others. Several studies have found that a high percentage of various groups of the Spanish population suffer from vitamin D deficiency, and since very few natural foods contain vitamin D, it was considered important to determine whether groups such as schoolchildren, outdoor workers and athletes, receive enough solar radiation to produce adequate levels of vitamin D in their daily activities. It was found that the amount of vitamin D (in IU) produced by personal effective solar UV doses could exceed the recommended dose of 1000IU/day in spring and summer, while the winter estimate (about 220IU/day) is only one quarter of the recommended dose. These results suggest that most people would not receive the recommended daily vitamin D dose in winter from exposure to solar UV radiation, the main source of vitamin D.
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Affiliation(s)
- Maria-Antonia Serrano
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
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12
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Healthy changes in some cardiometabolic risk factors accompany the higher summertime serum 25-hydroxyvitamin D concentrations in Iranian children: National Food and Nutrition Surveillance. Public Health Nutr 2018; 21:2013-2021. [PMID: 29580303 DOI: 10.1017/s1368980018000630] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To investigate seasonal variations of vitamin D status at different latitudes and if these changes are accompanied by corresponding variations in certain health parameters in children living in a broad latitudinal range in Iran. DESIGN Longitudinal study. SUBJECTS In total, 530 apparently healthy children aged 5-18 years were randomly selected from six regions of Iran with a latitudinal gradient from 29°N to 37·5°N. All anthropometric and biochemical assessments were performed twice during a year (summer, winter). High BMI (Z-score >1), low HDL cholesterol (150 mg/dl) were considered cardiometabolic risk factors. RESULTS Serum 25-hydroxyvitamin D (25(OH)D) showed between-season variation, with significantly higher concentrations (mean (sd)) in summer v. winter (43 (29) v. 27 (18) nmol/l; P33°N v. <33°N: 4·5; 0·09, 9·0; P=0·04) were predictors of change of serum 25(OH)D between two seasons. CONCLUSIONS Summertime improvement of vitamin D status was accompanied by certain improved cardiometabolic risk factors, notably serum TAG, total cholesterol and BMI, in children.
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Pilz S, März W, Cashman KD, Kiely ME, Whiting SJ, Holick MF, Grant WB, Pludowski P, Hiligsmann M, Trummer C, Schwetz V, Lerchbaum E, Pandis M, Tomaschitz A, Grübler MR, Gaksch M, Verheyen N, Hollis BW, Rejnmark L, Karras SN, Hahn A, Bischoff-Ferrari HA, Reichrath J, Jorde R, Elmadfa I, Vieth R, Scragg R, Calvo MS, van Schoor NM, Bouillon R, Lips P, Itkonen ST, Martineau AR, Lamberg-Allardt C, Zittermann A. Rationale and Plan for Vitamin D Food Fortification: A Review and Guidance Paper. Front Endocrinol (Lausanne) 2018; 9:373. [PMID: 30065699 PMCID: PMC6056629 DOI: 10.3389/fendo.2018.00373] [Citation(s) in RCA: 219] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 06/21/2018] [Indexed: 01/14/2023] Open
Abstract
Vitamin D deficiency can lead to musculoskeletal diseases such as rickets and osteomalacia, but vitamin D supplementation may also prevent extraskeletal diseases such as respiratory tract infections, asthma exacerbations, pregnancy complications and premature deaths. Vitamin D has a unique metabolism as it is mainly obtained through synthesis in the skin under the influence of sunlight (i.e., ultraviolet-B radiation) whereas intake by nutrition traditionally plays a relatively minor role. Dietary guidelines for vitamin D are based on a consensus that serum 25-hydroxyvitamin D (25[OH]D) concentrations are used to assess vitamin D status, with the recommended target concentrations ranging from ≥25 to ≥50 nmol/L (≥10-≥20 ng/mL), corresponding to a daily vitamin D intake of 10 to 20 μg (400-800 international units). Most populations fail to meet these recommended dietary vitamin D requirements. In Europe, 25(OH)D concentrations <30 nmol/L (12 ng/mL) and <50 nmol/L (20 ng/mL) are present in 13.0 and 40.4% of the general population, respectively. This substantial gap between officially recommended dietary reference intakes for vitamin D and the high prevalence of vitamin D deficiency in the general population requires action from health authorities. Promotion of a healthier lifestyle with more outdoor activities and optimal nutrition are definitely warranted but will not erase vitamin D deficiency and must, in the case of sunlight exposure, be well balanced with regard to potential adverse effects such as skin cancer. Intake of vitamin D supplements is limited by relatively poor adherence (in particular in individuals with low-socioeconomic status) and potential for overdosing. Systematic vitamin D food fortification is, however, an effective approach to improve vitamin D status in the general population, and this has already been introduced by countries such as the US, Canada, India, and Finland. Recent advances in our knowledge on the safety of vitamin D treatment, the dose-response relationship of vitamin D intake and 25(OH)D levels, as well as data on the effectiveness of vitamin D fortification in countries such as Finland provide a solid basis to introduce and modify vitamin D food fortification in order to improve public health with this likewise cost-effective approach.
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Affiliation(s)
- Stefan Pilz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
- *Correspondence: Stefan Pilz ;
| | - Winfried März
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
- Synlab Academy, Synlab Services GmbH, Mannheim, Germany
| | - Kevin D. Cashman
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland
| | - Mairead E. Kiely
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland
| | - Susan J. Whiting
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Michael F. Holick
- Section of Endocrinology, Nutrition and Diabetes, Department of Medicine, Physiology and Biophysics, Boston University Medical Center, Boston, MA, United States
| | - William B. Grant
- Sunlight, Nutrition and Health Research Center, San Francisco, CA, United States
| | - Pawel Pludowski
- Department of Biochemistry, Radioimmunology and Experimental Medicine, The Children's Memorial Health Institute, Warsaw, Poland
| | - Mickael Hiligsmann
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, Netherlands
| | - Christian Trummer
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Verena Schwetz
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Elisabeth Lerchbaum
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Marlene Pandis
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | | | - Martin R. Grübler
- Department of Cardiology, Swiss Cardiovascular Center Bern, Bern University Hospital, Bern, Switzerland
| | - Martin Gaksch
- Department of Laboratory Medicine, Paracelsus Medical University, Salzburg, Austria
| | - Nicolas Verheyen
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Bruce W. Hollis
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, United States
| | - Lars Rejnmark
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Spyridon N. Karras
- Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
| | - Andreas Hahn
- Institute of Food Science and Human Nutrition, Leibniz University Hannover, Hannover, Germany
| | - Heike A. Bischoff-Ferrari
- Department of Geriatrics and Aging Research, University Hospital Zurich and Waid City Hospital, University of Zurich, Zurich, Switzerland
| | - Jörg Reichrath
- Center for Clinical and Experimental Photodermatology, The Saarland University Hospital, Homburg, Germany
| | - Rolf Jorde
- Tromsø Endocrine Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ibrahim Elmadfa
- Department of Nutritional Sciences, Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Reinhold Vieth
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Robert Scragg
- School of Population Health, University of Auckland, Auckland, New Zealand
| | - Mona S. Calvo
- U.S. Food and Drug Administration, Silver Spring, MD, United States
| | - Natasja M. van Schoor
- Department of Epidemiology and Biostatistics, Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, Netherlands
| | - Roger Bouillon
- Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Leuven, Belgium
| | - Paul Lips
- Endocrine Section, Department of Internal Medicine, VU University Medical Center, Amsterdam, Netherlands
| | - Suvi T. Itkonen
- Calcium Research Unit, Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
| | - Adrian R. Martineau
- Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Christel Lamberg-Allardt
- Calcium Research Unit, Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
| | - Armin Zittermann
- Clinic for Thoracic and Cardiovascular Surgery, Heart Center North Rhine-Westfalia, Ruhr University Bochum, Bad Oeynhausen, Germany
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Vernia P, Burrelli Scotti G, Dei Giudici A, Chiappini A, Cannizzaro S, Afferri MT, de Carolis A. Inadequate sunlight exposure in patients with inflammatory bowel disease. J Dig Dis 2018; 19:8-14. [PMID: 29251424 DOI: 10.1111/1751-2980.12567] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Inadequate sun exposure impairs vitamin D activity and favors low bone density, especially in patients at increased risk for osteoporosis, such as those affected by inflammatory bowel disease (IBD). In this study, sun exposure was investigated in a large series of patients with IBD in a Mediterranean country, Italy, where this risk is considered less likely to occur than in higher latitudes. METHODS This is a case-control study of 292 patients with IBD [132 with Crohn's disease (CD) and 160 with ulcerative colitis (UC)], 80 diseased and 540 healthy controls, conducted via a validated questionnaire to quantify sunlight exposure. Data were also compared with controls matched by age and gender. RESULTS In total 78 of the 292 patients with IBD had low, 169 had moderate and 45 had high exposure to sunlight, significantly differing from controls (P < 0.001). The 132 patients with CD were more likely to have abnormal levels of sunlight exposure (49 low, 72 moderate and 11 high) than those with UC (29 low, 97 moderate and 34 high) (P < 0.001). The controls were significantly more exposed to sunlight than both men and women with IBD (P < 0.001 and 0.004, respectively). CONCLUSIONS IBD patients are significantly less exposed to sunlight than matched controls in Italy, often to an extent that may impair vitamin D activation. Increasing responsible sunlight exposure, thus promoting adequate vitamin D concentrations, may prove beneficial in IBD, in geographical areas in which this risk factor is not generally taken into consideration.
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Affiliation(s)
- Piero Vernia
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Giorgia Burrelli Scotti
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Anna Dei Giudici
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Ambra Chiappini
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Santi Cannizzaro
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Maria Teresa Afferri
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - Aurora de Carolis
- Division of Gastroenterology, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
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15
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Cardoso S, Santos A, Guerra RS, Sousa AS, Padrão P, Moreira P, Afonso C, Amaral TF, Borges N. Association between serum 25-hidroxyvitamin D concentrations and ultraviolet index in Portuguese older adults: a cross-sectional study. BMC Geriatr 2017; 17:256. [PMID: 29089044 PMCID: PMC5664428 DOI: 10.1186/s12877-017-0644-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 10/16/2017] [Indexed: 12/14/2022] Open
Abstract
Background The older population is a risk group for hypovitaminosis D. The Ultraviolet Index (UVI) can be an indicator of potential for cutaneous synthesis of vitamin D but physiological and other environmental factors also influence vitamin D synthesis and status. Knowledge about vitamin D status in Portuguese older adults is limited. This study aims to explore the association between Ultraviolet Index and serum 25-hidroxyvitamin D3 [25(OH)D] levels accounting for other potential influential factors. Methods A cross-sectional study was conducted between December 2015 and June 2016, in 1497 Portuguese older adults (≥ 65 years) within Nutrition UP 65 project. For each participant, serum 25(OH)D was determined and the mean UVI (mUVI) in the respective residence district was calculated for the previous 30 days. Stepwise linear regression analyses were conducted for the following periods of blood collection: between December and June, December and March and April and June. Standardized regression coefficients (Sβ) and 95% confidence intervals were calculated. Results The median 25(OH)D concentration was 35.9 nmol/L. The UVI was independently and positively associated with 25(OH)D in the models for December–June (Sβ = 0.244, 95% CI: 0.198; 0.291, P < 0.001) and April–June (Sβ = 0.295, 95% CI: 0.299; 0.362, P < 0.001) and independently and negatively associated in December–March period (Sβ = −0.149, 95% CI: -0.211; −0.087, P < 0.001). Conclusions In this sample with high vitamin D deficiency frequency, the UVI was a predictor of 25(OH)D levels but the direction of the association varied according to the blood collection period. Our results suggest that accounting for the time of year in future research regarding vitamin status and related public health recommendations may be relevant. Electronic supplementary material The online version of this article (10.1186/s12877-017-0644-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sofia Cardoso
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Alejandro Santos
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,I3S-Instituto de Investigação e Inovação em Saúde, R. Alfredo Allen, 4200-135, Porto, Portugal
| | - Rita S Guerra
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Ana S Sousa
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Patrícia Padrão
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, n° 135, 4050-600, Porto, Portugal
| | - Pedro Moreira
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,Centro de Investigação em Atividade Física, Saúde e Lazer, Universidade do Porto, R. Dr. Plácido da Costa 91, 4200-450, Porto, Portugal.,CINTESIS - Centre for Health Technology and Services Research, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal
| | - Cláudia Afonso
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Teresa F Amaral
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Nuno Borges
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. .,CINTESIS - Centre for Health Technology and Services Research, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal.
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16
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Özçelik R, Bruckmaier RM, Hernández-Castellano LE. Prepartum daylight exposure increases serum calcium concentrations in dairy cows at the onset of lactation
1. J Anim Sci 2017; 95:4440-4447. [DOI: 10.2527/jas2017.1834] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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A review of prevalence studies of Autism Spectrum Disorder by latitude and solar irradiance impact. Med Hypotheses 2017; 109:19-24. [PMID: 29150285 DOI: 10.1016/j.mehy.2017.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/07/2017] [Accepted: 09/15/2017] [Indexed: 12/20/2022]
Abstract
Autism Spectrum Disorder (ASD) is a lifelong disability with no known cause or cure. Among the suggested etiologies, is Cannell's hypothesis of a deficiency in Vitamin D the main natural source of which is Solar Ultraviolet-B (UVB) radiation. The aim in this paper is to build on this hypothesis and explore the relationship of solar irradiance of which UVB is a component, by latitude with the prevalence rates of ASD. Twenty-five reports published between 2011 and 2016 using comparable diagnostic criteria were reviewed. The results suggest a tendency for the prevalence rates of ASD to be lowest in countries near the equator and for this rate to increase as the latitude increases. These findings provide some support not just for the Vitamin D hypothesis, but also for a new proposition that along with UVB radiation, the entire solar radiation spectrum which reaches the earth, may play a role in ASD. While these results are both novel and encouraging in terms of the potential efficacy of exposure to natural sunlight, further research is warranted before results can be considered definitive, and before the implications of the findings can be implemented clinically.
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Impact of Orientation on the Vitamin D Weighted Exposure of a Human in an Urban Environment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14080920. [PMID: 28813022 PMCID: PMC5577621 DOI: 10.3390/ijerph14080920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/04/2017] [Accepted: 08/10/2017] [Indexed: 01/17/2023]
Abstract
The vitamin D3-weighted UV exposure of a human with vertical posture was calculated for urban locations to investigate the impact of orientation and obstructions on the exposure. Human exposure was calculated by using the 3D geometry of a human and integrating the radiance, i.e., the radiant energy from the direct solar beam and the diffuse sky radiation from different incident and azimuth angles. Obstructions of the sky are derived from hemispherical images, which are recorded by a digital camera with a fisheye lens. Due to the low reflectivity of most surfaces in the UV range, the radiance from obstructed sky regions was neglected. For spring equinox (21 March), the exposure of a human model with winter clothing in an environment where obstructions cover 40% of the sky varies by up to 25%, depending on the orientation of the human model to the sun. The calculation of the accumulated vitamin D3-weighted exposure of a human with winter clothing walking during lunch break shows that human exposure is reduced by the obstruction of buildings and vegetation by 40%.
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Higher prevalence of vitamin D deficiency in German pregnant women compared to non-pregnant women. Arch Gynecol Obstet 2017; 296:43-51. [PMID: 28526926 DOI: 10.1007/s00404-017-4398-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 05/09/2017] [Indexed: 01/05/2023]
Abstract
PURPOSE Adequate vitamin D status is crucial for normal development of the fetus and for maternal health. As data on vitamin D status (25-hydroxyvitamin D, 25(OH)D) in German women of different states of pregnancy were not available, this study compared the vitamin D status of German women in all trimesters of pregnancy with that of non-pregnant women. METHODS The study sample of 858 women (18-45 years) was recruited from April 2013 to March 2015 as a part of the cross-sectional Germany-wide VitaMinFemin study. Serum 25(OH)D levels were determined using chemiluminescence immunoassay. RESULTS A total of 78.1% of the pregnant women and 53.9% of the non-pregnant women had a vitamin D status <50.0 nmol/L (p < 0.001). In pregnant women, the multivariate binary analysis showed that winter [odds ratio (OR) 13.5], longitude of residence between 6.3°E and 8.9°E (OR 2.0) or 9.0°E and 10.9°E (OR 2.3) and third trimester (OR 2.3) were associated with a higher risk of vitamin D status <25.0 nmol/L, whereas increasing age per one year (OR 0.9) with a lower risk. Compared with non-pregnant women, pregnant women were 3.7 times more likely to have a vitamin D status <25.0 nmol/L. CONCLUSION A low vitamin D status is prevalent among German pregnant women and should be improved to supply mother and fetus adequately.
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Gellert S, Ströhle A, Hahn A. Breastfeeding woman are at higher risk of vitamin D deficiency than non-breastfeeding women - insights from the German VitaMinFemin study. Int Breastfeed J 2017; 12:19. [PMID: 28435438 PMCID: PMC5397784 DOI: 10.1186/s13006-017-0105-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 03/13/2017] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Despite increased awareness of the adverse health effects of vitamin D deficiency, only a few studies have evaluated the vitamin D status (25-hydroxyvitamin D [25(OHD)]) of breastfeeding women and up to now, no information exits for German breastfeeding women. Therefore, the aim of study was to determine the vitamin D status of breastfeeding women compared to non-pregnant and non-breastfeeding (NPNB) women. METHODS This cross-sectional study investigated 124 breastfeeding women and 124 age and season matched NPNB women from the German "Vitamin and mineral status among German women" study. The study participants were recruited from April 2013 to March 2015 and did not take vitamin D supplements. Serum 25(OH)D was analyzed by chemiluminescent immunoassay. RESULTS Vitamin D deficiency (<25.0 nmol/L) was prevalent in 26.6% of the breastfeeding women. The majority of women (49.2%) showed 25(OH)D concentration between 25.0 and 49.9 nmol/L. In multiple binary logistic regression analysis, breastfeeding women had a 4.0-fold higher odds ratio (OR) (95% confidence interval [CI] 1.8, 8.7) for vitamin D deficiency than NPNB women. For breastfeeding women, the risk of vitamin D deficiency was higher in the winter and spring months (OR: 2.6, 95% CI 1.1, 6.3) and increased with lower longitude per one unit (OR 0.7, 95% CI 0.6, 0.9). CONCLUSION Breastfeeding women in Germany had a higher risk of deficient vitamin D levels than NPNB women. In further studies, the optimal vitamin D status for breastfeeding women should be investigated and also the required vitamin D doses to ensure this vitamin D status. TRIAL REGISTRATION German Clinical Trial Register (identification number: DRKS00004789).
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Affiliation(s)
- Sandra Gellert
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Alexander Ströhle
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Andreas Hahn
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
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Langston M, Dennis L, Lynch C, Roe D, Brown H. Temporal Trends in Satellite-Derived Erythemal UVB and Implications for Ambient Sun Exposure Assessment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14020176. [PMID: 28208641 PMCID: PMC5334730 DOI: 10.3390/ijerph14020176] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/07/2017] [Indexed: 12/13/2022]
Abstract
Ultraviolet radiation (UVR) has been associated with various health outcomes, including skin cancers, vitamin D insufficiency, and multiple sclerosis. Measurement of UVR has been difficult, traditionally relying on subject recall. We investigated trends in satellite-derived UVB from 1978 to 2014 within the continental United States (US) to inform UVR exposure assessment and determine the potential magnitude of misclassification bias created by ignoring these trends. Monthly UVB data remotely sensed from various NASA satellites were used to investigate changes over time in the United States using linear regression with a harmonic function. Linear regression models for local geographic areas were used to make inferences across the entire study area using a global field significance test. Temporal trends were investigated across all years and separately for each satellite type due to documented differences in UVB estimation. UVB increased from 1978 to 2014 in 48% of local tests. The largest UVB increase was found in Western Nevada (0.145 kJ/m2 per five-year increment), a total 30-year increase of 0.87 kJ/m2. This largest change only represented 17% of total ambient exposure for an average January and 2% of an average July in Western Nevada. The observed trends represent cumulative UVB changes of less than a month, which are not relevant when attempting to estimate human exposure. The observation of small trends should be interpreted with caution due to measurement of satellite parameter inputs (ozone and climatological factors) that may impact derived satellite UVR nearly 20% compared to ground level sources. If the observed trends hold, satellite-derived UVB data may reasonably estimate ambient UVB exposures even for outcomes with long latency phases that predate the satellite record.
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Affiliation(s)
- Marvin Langston
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724, USA.
- Division of Public Health Sciences, Department of Surgery, Washington University in Saint Louis School of Medicine, St. Louis, MO 63110, USA.
| | - Leslie Dennis
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724, USA.
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52246, USA.
| | - Charles Lynch
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52246, USA.
| | - Denise Roe
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724, USA.
| | - Heidi Brown
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724, USA.
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Serrano MA, Cañada J, Moreno JC, Gurrea G. Solar ultraviolet doses and vitamin D in a northern mid-latitude. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:744-750. [PMID: 27664761 DOI: 10.1016/j.scitotenv.2016.09.102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/13/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
Solar ultraviolet (UV) radiation is one of the most important factors in the development of skin cancer in human, solar erythema and skin aging. Nevertheless, numerous studies have shown the benefits of UV solar radiation in moderate doses, such as the reduction of blood pressure and mental health, treatment of various diseases, and the synthesis of vitamin D in the skin. This paper analyses data from solar ultraviolet erythemal (UVER) irradiance in W/m2 measured in a northern mid-latitude as Valencia (Spain) for the period 2003-2010. To estimate effective solar UV radiation in the production of vitamin D (UVD) we used the relationship proposed by McKenzie et al. (2009). It was obtained for one month for each season the minimum exposure time needed around solar noon and at 9 UTC and 15 UTC (Coordinated Universal Time) to obtain the recommended daily dose of 1000IU. Also, it has been calculated time for erythema induction around solar noon for the same months. The median UVER daily dose during the summer months was 4000J/m2day, and 700J/m2day in winter. With regard to UVD, the median UVD daily dose in summer season was 7700J/m2day, and in winter it was 1000J/m2day. Around noon in January it takes more than two hours of solar exposure to obtain the recommended daily dose of vitamin D, whereas the rest of the year range between 7min on July and 31min on October. For the same months around noon, exposure times to produce erythema were obtained, these being of higher value to the previous. The results show that it is difficult to obtain the recommended vitamin D doses in winter in a northern mid-latitude, as the human body is almost entirely covered in this season.
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Affiliation(s)
- Maria-Antonia Serrano
- Solar Radiation Research Group, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain.
| | - Javier Cañada
- Solar Radiation Research Group, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain
| | - Juan Carlos Moreno
- Solar Radiation Research Group, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain.
| | - Gonzalo Gurrea
- Solar Radiation Research Group, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain.
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Miyauchi M, Nakajima H. Determining an Effective UV Radiation Exposure Time for Vitamin D Synthesis in the Skin Without Risk to Health: Simplified Estimations from UV Observations. Photochem Photobiol 2016; 92:863-869. [DOI: 10.1111/php.12651] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 09/14/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Masaatsu Miyauchi
- Center for Global Environmental Research National Institute for Environmental Studies Tsukuba Ibaraki 305‐8506 Japan
| | - Hideaki Nakajima
- Center for Global Environmental Research National Institute for Environmental Studies Tsukuba Ibaraki 305‐8506 Japan
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Moshammer H, Simic S, Haluza D. UV "Indices"-What Do They Indicate? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13101041. [PMID: 27783061 PMCID: PMC5086780 DOI: 10.3390/ijerph13101041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 10/14/2016] [Accepted: 10/18/2016] [Indexed: 12/11/2022]
Abstract
Ultra-Violet (UV) radiation covers the spectrum of wavelengths from 100 to 400 nm. The potency and biological activity for a variety of endpoints differ by wavelength. For monitoring and communication purposes, different UV action spectra have been developed. These spectra use different weighting functions. The action spectrum for erythemal dose is the most widely used one. This erythemal dose per time or dose-rate has been further simplified into a “UV index”. Following this example, in our review we use the term “index” or (plural) “indices” in a more general description for all simplified single-value measures for any biologically effective UV dose, e.g., for human non-melanoma skin cancer and for previtamin D production rate. Ongoing discussion about the existence of an increased melanoma risk due to UV-A exposure underscores the uncertainties inherent in current weighting functions. Thus, we performed an online literature search to review the data basis for these indices, to understand their relevance for an individual, and to assess the applicability of the indices for a range of exposure scenarios. Even for natural (solar) UV, the spectral composition varies spatially and temporally. Artificial UV sources and personal protection introduce further variation to the spectral composition. Many biological effects are proposed for UV radiation. Only few endpoints have been studied sufficiently to estimate a reliable index. Weighting functions for chronic effects and most importantly for cancer endpoints have been developed in animal models, and often for proxy endpoints only. Epidemiological studies on biological effects of UV radiation should not only depend on single-value weighted UV dose estimates (indexes) but should strive for a more detailed description of the individual exposure. A better understanding of the adverse and beneficial effects of UV radiation by wavelength would also improve medical counseling and health communication regarding individual health-supportive behavior.
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Affiliation(s)
- Hanns Moshammer
- Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Vienna 1090, Austria.
| | - Stana Simic
- Institute for Meteorology, University of Natural Resources and Life Sciences, Vienna 1180, Austria.
| | - Daniela Haluza
- Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Vienna 1090, Austria.
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Schrempf M, Haluza D, Simic S, Riechelmann S, Graw K, Seckmeyer G. Is Multidirectional UV Exposure Responsible for Increasing Melanoma Prevalence with Altitude? A Hypothesis Based on Calculations with a 3D-Human Exposure Model. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13100961. [PMID: 27690069 PMCID: PMC5086700 DOI: 10.3390/ijerph13100961] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/21/2016] [Accepted: 09/22/2016] [Indexed: 11/16/2022]
Abstract
In a recent study, melanoma incidence rates for Austrian inhabitants living at higher altitudes were found to increase by as much as 30% per 100 m altitude. This strong increase cannot simply be explained by the known increase of erythemally-weighted irradiance with altitude, which ranges between 0.5% and 4% per 100 m. We assume that the discrepancy is partially explainable by upwelling UV radiation; e.g., reflected by snow-covered surfaces. Therefore, we present an approach where the human UV exposure is derived by integrating incident radiation over the 3D geometry of a human body, which enables us to take upwelling radiation into account. Calculating upwelling and downwelling radiance with a radiative transfer model for a snow-free valley and for snow-covered mountain terrain (with albedo of 0.6) yields an increase in UV exposure by 10% per 100 m altitude. The results imply that upwelling radiation plays a significant role in the increase of melanoma incidence with altitude.
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Affiliation(s)
- Michael Schrempf
- Institute of Meteorology and Climatology, Leibniz Universität Hannover, Hannover 30419, Germany.
| | - Daniela Haluza
- Institute of Environmental Health, Center for Public Health, Medical University of Vienna, Vienna 1090, Austria.
| | - Stana Simic
- Institute of Meteorology, University of Natural Resources and Applied Life Sciences, Vienna 1190, Austria.
| | - Stefan Riechelmann
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 38116, Germany.
| | - Kathrin Graw
- Deutscher Wetterdienst, Offenbach 63067, Germany.
| | - Gunther Seckmeyer
- Institute of Meteorology and Climatology, Leibniz Universität Hannover, Hannover 30419, Germany.
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Liu Y, Hu L, Wang F, Gao Y, Zheng Y, Wang Y, Liu Y. The angular distributions of ultraviolet spectral irradiance at different solar elevation angles under clear sky conditions. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2016; 60:63-72. [PMID: 25994798 DOI: 10.1007/s00484-015-1005-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 04/14/2015] [Accepted: 04/26/2015] [Indexed: 06/04/2023]
Abstract
To investigate the angular distributions of UVA, UVB, and effective UV for erythema and vitamin D (vitD) synthesis, the UV spectral irradiances were measured at ten inclined angles (from 0° to 90°) and seven azimuths (from 0° to 180°) at solar elevation angle (SEA) that ranged from 18.8° to 80° in Shanghai (31.22° N, 121.55° E) under clear sky and the albedo of ground was 0.1. The results demonstrated that in the mean azimuths and with the back to the sun, the UVA, UVB, and erythemally and vitD-weighted irradiances increased with the inclined angles and an increase in SEA. When facing toward the sun at 0°-60° inclined angles, the UVA first increased and then decreased with an increase in SEA; at other inclined angles, the UVA increased with SEA. At 0°-40° inclined angles, the UVB and erythemally and vitD-weighted irradiances first increased and then decreased with an increase in SEA, and their maximums were achieved at SEA 68.7°; at other inclined angles, the above three irradiances increased with an increase in SEA. The maximum UVA, UVB, and erythemally and vitD-weighted irradiances were achieved at an 80° inclined angle at SEA 80° (the highest in our measurements); the cumulative exposure of the half day achieved the maximum at a 60° inclined angle, but not on the horizontal. This study provides support for the assessment of human skin sun exposure.
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Affiliation(s)
- Yan Liu
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
- Department of Biomedical Engineering, China Medical University, Shenyang, China
| | - LiWen Hu
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
| | - Fang Wang
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
| | - YanYan Gao
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
| | - Yang Zheng
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
| | - Yu Wang
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China
| | - Yang Liu
- Department of Environmental Health, School fo Public Health, China Medical University, Shenyang, China.
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Reduction of Solar UV Radiation Due to Urban High-Rise Buildings--A Coupled Modelling Study. PLoS One 2015; 10:e0135562. [PMID: 26263507 PMCID: PMC4532478 DOI: 10.1371/journal.pone.0135562] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 07/24/2015] [Indexed: 12/02/2022] Open
Abstract
Solar UV radiation has both adverse and beneficial effects to human health. Using models (a radiative transfer model coupled to a building shading model), together with satellite and surface measurements, we studied the un-obstructed and obstructed UV environments in a sub-tropical urban environment featured with relatively high pollution (aerosol) loadings and high-rise buildings. Seasonal patterns of the erythemal UV exposure rates were governed by solar zenith angles, seasonal variations of aerosol loadings and cloud effects. The radiative transfer modelling results agreed with measurements of erythemal UV exposure rates and spectral irradiances in UVA and UVB ranges. High-rise buildings and narrow road width (height to width, H/W, ratios up to 15) reduced the modelled total UV (UVA+UVB) radiation and leave 10% of the un-obstructed exposure rate at ground-level at noon. No more than 80% of the un-obstructed exposure rate was received in the open area surrounded by 20-storey buildings. Our modelled reduction of UVB radiation in the urban environment was consistent with similar measurements obtained for Australia. However, our results in more extreme environments (higher H/W ratios) were for the first time reported, with 18% of the un-obstructed exposure rate remained at the ground-level center of the street canyon.
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29
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Romano A, Vigna L, Belluigi V, Conti DM, Barberi CE, Tomaino L, Consonni D, Riboldi L, Tirelli AS, Andersen LL. Shift work and serum 25-OH vitamin D status among factory workers in Northern Italy: Cross-sectional study. Chronobiol Int 2015; 32:842-7. [PMID: 26125129 DOI: 10.3109/07420528.2015.1048867] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Low levels of vitamin D are related to muscle weakness, poor balance, and higher risk of falls, and can therefore have a major impact on performance and safety at work. Little knowledge exists on the association between work environment and vitamin D status. This study evaluates vitamin D status in shift workers. In this cross-sectional study, led during early springtime, 96 male shift workers at an engineering factory in Northern Italy, and 100 male daily workers operating nearby, participated. 25-OH vitamin D concentration, anthropometric indexes, fasting glycemia and triglycerides were detected. 51 shift workers underwent anamnesis collection on lifestyle and habits and determination of heel bone mineral density. Vitamin D levels were lower in shift workers than daily ones (13.4 ± 5.3 ng/mL versus 21.9 ± 10.7 ng/mL, p < 0.001). Linear regression analysis adjusted for age, body mass index and smoking habits confirms a statistically significant association between shift work and vitamin D levels (p < 0.0001). An association trend between cigarette smoking and low vitamin D values was found. No significant association was detected between the heel bone mineral density values and vitamin D levels or smoking habits. In conclusion, this cross-sectional study highlights the high prevalence of vitamin D deficit among shift workers compared with daily ones.
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Affiliation(s)
- Alessandro Romano
- Department of Clinical Sciences and Community Health, Post-graduate School of Occupational Medicine, Università degli Studi di Milano , Milan , Italy
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The influence of the environment and clothing on human exposure to ultraviolet light. PLoS One 2015; 10:e0124758. [PMID: 25923778 PMCID: PMC4414538 DOI: 10.1371/journal.pone.0124758] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 03/05/2015] [Indexed: 12/01/2022] Open
Abstract
Objection The aim of this study is to determine the effect of clothing and the environment on human exposure to ultraviolet light. Methods The ultraviolet (ultraviolet A and ultraviolet B) light intensity was measured, and air quality parameters were recorded in 2014 in Beijing, China. Three types of clothing (white polyester cloth, pure cotton white T-shirt, and pure cotton black T-shirt) were individually placed on a mannequin. The ultraviolet (ultraviolet A and ultraviolet B) light intensities were measured above and beneath each article of clothing, and the percentage of ultraviolet light transmission through the clothing was calculated. Results (1) The ultraviolet light transmission was significantly higher through white cloth than through black cloth; the transmission was significantly higher through polyester cloth than through cotton. (2) The weather significantly influenced ultraviolet light transmission through white polyester cloth; transmission was highest on clear days and lowest on overcast days (ultraviolet A: P=0.000; ultraviolet B: P=0.008). (3) Air quality parameters (air quality index and particulate matter 2.5 and 10) were inversely related to the ultraviolet light intensity that reached the earth’s surface. Ultraviolet B transmission through white polyester cloth was greater under conditions of low air pollution compared with high air pollution. Conclusion Clothing color and material and different types of weather affected ultraviolet light transmission; for one particular cloth, the transmission decreased with increasing air pollution.
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Bais AF, McKenzie RL, Bernhard G, Aucamp PJ, Ilyas M, Madronich S, Tourpali K. Ozone depletion and climate change: impacts on UV radiation. Photochem Photobiol Sci 2015; 14:19-52. [DOI: 10.1039/c4pp90032d] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Percentage changes in the UV Index (UVI) for 2090 relative to 2015 due to changes in ozone (left) and aerosols (right) only. Large decreases are projected over Antarctica due to stratospheric ozone recovery. Increases are projected for parts of Asia due to decreases in aerosols, partly reversing the possible large reductions in UVI after the 1950s.
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Affiliation(s)
- A. F. Bais
- Laboratory of Atmospheric Physics
- Aristotle University of Thessaloniki
- 54124 Thessaloniki
- Greece
| | - R. L. McKenzie
- National Institute of Water and Atmospheric Research
- PB 50061 Omakau, Central Otago
- New Zealand
| | | | - P. J. Aucamp
- Ptersa Environmental Management Consultants
- Faerie Glen
- South Africa
| | - M. Ilyas
- School of Environmental Engineering
- University Malaysia Perlis
- Kangar
- Malaysia
| | - S. Madronich
- National Center for Atmospheric Research
- Boulder
- USA
| | - K. Tourpali
- Laboratory of Atmospheric Physics
- Aristotle University of Thessaloniki
- 54124 Thessaloniki
- Greece
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Downs N, Parisi A, Butler H, Turner J, Wainwright L. Minimum Exposure Limits and Measured Relationships Between the Vitamin D, Erythema and International Commission on Non-Ionizing Radiation Protection Solar Ultraviolet. Photochem Photobiol 2014; 91:438-49. [DOI: 10.1111/php.12394] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 11/12/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Nathan Downs
- International Centre for Applied Climate Sciences; University of Southern Queensland; Toowoomba Qld Australia
- Centre for Health Sciences Research; University of Southern Queensland; Toowoomba Qld Australia
- Faculty of Health; Engineering and Sciences; University of Southern Queensland; Toowoomba Qld Australia
| | - Alfio Parisi
- International Centre for Applied Climate Sciences; University of Southern Queensland; Toowoomba Qld Australia
- Faculty of Health; Engineering and Sciences; University of Southern Queensland; Toowoomba Qld Australia
| | - Harry Butler
- International Centre for Applied Climate Sciences; University of Southern Queensland; Toowoomba Qld Australia
- Faculty of Health; Engineering and Sciences; University of Southern Queensland; Toowoomba Qld Australia
| | - Joanna Turner
- International Centre for Applied Climate Sciences; University of Southern Queensland; Toowoomba Qld Australia
- Faculty of Health; Engineering and Sciences; University of Southern Queensland; Toowoomba Qld Australia
| | - Lisa Wainwright
- Faculty of Health; Engineering and Sciences; University of Southern Queensland; Toowoomba Qld Australia
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Zaratti F, Piacentini RD, Guillén HA, Cabrera SH, Liley JB, McKenzie RL. Proposal for a modification of the UVI risk scale. Photochem Photobiol Sci 2014; 13:980-5. [DOI: 10.1039/c4pp00006d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Peak UVI values for the globe using a modified colour scale. With the colour scale for UVI as currently recommended by WHO, more than 78% of the globe area – representing 89% of the world's population – would be indistinguishable.
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Affiliation(s)
- Francesco Zaratti
- Laboratorio de Fisica de la Atmosfera
- Universidad Mayor de San Andres
- La Paz, Bolivia
| | - Rubén D. Piacentini
- Area Física de la Atmósfera
- Radiación Solar y Astropartículas
- Instituto de Física Rosario
- CONICET – Universidad Nacional de Rosario
- Rosario, Argentina
| | | | - Sergio H. Cabrera
- Universidad de Chile
- Facultad de Medicina
- Instituto de Ciencias Biomédicas
- Programa de Biología Celular y Molecular Independencia 1027
- Santiago, Chile
| | - J. Ben Liley
- National Institute of Water & Atmospheric Research (NIWA)
- Lauder
- Central Otago, New Zealand
| | - Richard L. McKenzie
- National Institute of Water & Atmospheric Research (NIWA)
- Lauder
- Central Otago, New Zealand
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Sandmann H, Stick C. Spectral and Spatial UV Sky Radiance Measurements at a Seaside Resort Under Clear Sky and Slightly Overcast Conditions. Photochem Photobiol 2013; 90:225-32. [DOI: 10.1111/php.12180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 09/26/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Henner Sandmann
- Institute of Medical Climatology; Kiel University; Kiel Germany
| | - Carsten Stick
- Institute of Medical Climatology; Kiel University; Kiel Germany
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