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Studies are often conducted in Caucasian individuals; other racial groups may respond differently.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>An outdoor, double\u2010blind, intra\u2010individual study was performed in 63 healthy Chinese and Caucasian volunteers in Singapore. Subjects underwent one outdoor sun exposure lasting 2\u20103\u00a0hours. ISO reference products P3 (SPF 15), P5 (SPF 30), and P8 (SPF\u00a050+) applied at 2\u00a0mg\/cm<jats:sup>2<\/jats:sup> were compared against each other and against an untreated exposed area (positive control) and an unexposed area (negative control). Endpoints were investigator global assessment (IGA) of erythema at 24\u00a0hours, IGA of pigmentation at 1\u00a0week, and colorimetry (a*, L*, and ITA) at 24\u00a0hours and 1\u00a0week.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Clinical erythema and pigmentation scores were statistically significantly different among the three sunscreens, with the highest SPF product providing the highest protection, confirming the discriminatory capacity of the model used. Colorimetric assessment correlated well with clinical evaluation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study confirmed the feasibility of ranking sunscreens (at 2\u00a0mg\/cm<jats:sup>2<\/jats:sup>) based on clinical effects of high\u2010intensity outdoor solar radiation. Larger studies are needed to look at differences in erythema and pigmentation reactions between Chinese and Caucasian individuals, which could be relevant for photoprotection.<\/jats:p><\/jats:sec>","DOI":"10.1111\/phpp.12710","type":"journal-article","created":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T18:47:56Z","timestamp":1624387676000},"page":"19-28","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Outdoor sunscreen testing with high\u2010intensity solar exposure in a Chinese and Caucasian population"],"prefix":"10.1111","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5117-448X","authenticated-orcid":false,"given":"Corinne","family":"Granger","sequence":"first","affiliation":[{"name":"Innovation and Development ISDIN Barcelona Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0337-5820","authenticated-orcid":false,"given":"Gavin","family":"Ong","sequence":"additional","affiliation":[{"name":"The Dermatology Practice @ Gleneagles Singapore City Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4706-8099","authenticated-orcid":false,"given":"Philippe","family":"Andres","sequence":"additional","affiliation":[{"name":"Clipeum Pharma Nice France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1925-5102","authenticated-orcid":false,"given":"Carles","family":"Trull\u00e0s","sequence":"additional","affiliation":[{"name":"Innovation and Development ISDIN Barcelona Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7778-9482","authenticated-orcid":false,"given":"Muzzammil","family":"Hosenally","sequence":"additional","affiliation":[{"name":"Department of Economics and Statistics University of Mauritius R\u00e9duit Mauritius"},{"name":"Centre International de D\u00e9veloppement Pharmaceutique Phoenix Mauritius"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2784-492X","authenticated-orcid":false,"given":"Wei","family":"Lai","sequence":"additional","affiliation":[{"name":"Department of Dermatology The 3rd Affiliated Hospital of Sun Yat\u2010sen University Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0041-6239","authenticated-orcid":false,"given":"Wei","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Dermatology Air Force General Hospital PLA Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8433-1517","authenticated-orcid":false,"given":"Jean","family":"Krutmann","sequence":"additional","affiliation":[{"name":"IUF \u2013 Leibniz Research Institute for Environmental Medicine D\u00fcsseldorf Germany"},{"name":"Medical Faculty Heinrich\u2010Heine\u2010University D\u00fcsseldorf Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0797-6570","authenticated-orcid":false,"given":"Thierry","family":"Passeron","sequence":"additional","affiliation":[{"name":"Department of Dermatology Centre Hospitalier\u2010Universitaire de Nice Universit\u00e9 C\u00f4te d'Azur Nice France"},{"name":"INSERM C3M (U1065) Universit\u00e9 C\u00f4te d'Azur Nice France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1576-1115","authenticated-orcid":false,"given":"Henry W.","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Dermatology Henry Ford Hospital Detroit MI USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,8,4]]},"reference":[{"key":"e_1_2_9_2_1","unstructured":"International Organization for Standardization.ISO 24444:2019. 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