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Drug checking has gained popularity in recent years to test for adulterants, but epidemiology studies are needed to estimate potential shifts in prevalence of drug checking to further inform harm reduction efforts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Adults entering randomly selected EDM events in New York City were surveyed in 2017 and 2022. Those reporting past\u2010year ecstasy use were asked if they tested their ecstasy in the past year using a drug testing kit and whether they found out or suspected their ecstasy contained other drugs. We compared estimates between 2017 and 2022.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      In 2017, an estimated 23.1% had tested their ecstasy, and this estimate increased to 43.1% in 2022 (86.6% increase,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.006). Among those who tested their ecstasy, in 2017, 31.2% always tested their drug, and this increased to 60.6% in 2022 (94.2% increase,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.026). In 2017, 59.6% of those who tested their ecstasy reported finding out or suspecting their drug was adulterated, which decreased to 18.4% in 2022 (69.1% decrease,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Suspected methamphetamine adulteration in particular decreased, from 21.9% in 2017 to 3.6% in 2022 (83.6% decrease,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.007).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion and Conclusions<\/jats:title>\n                    <jats:p>The use of drug testing kits has increased among EDM event attendees who use ecstasy and, at the same time, among those who had tested their ecstasy, suspected adulteration has decreased. Continued interest in understanding ecstasy contents among this population suggests the need for formal drug checking services.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/dar.13829","type":"journal-article","created":{"date-parts":[[2024,2,26]],"date-time":"2024-02-26T19:40:05Z","timestamp":1708976405000},"page":"975-983","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Increases in the use of drug testing kits among nightclub and festival attendees in New York City who use ecstasy, 2017\u20132022"],"prefix":"10.1111","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7779-5874","authenticated-orcid":false,"given":"Nicole D.","family":"Fitzgerald","sequence":"first","affiliation":[{"name":"Department of Epidemiology College of Public Health and Health Professions, College of Medicine, University of Florida  Gainesville USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8565-9415","authenticated-orcid":false,"given":"Joseph J.","family":"Palamar","sequence":"additional","affiliation":[{"name":"Department of Population Health NYU Grossman School of Medicine  New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,2,26]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugpo.2019.07.005"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/jat\/bky051"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/08897077.2016.1267070"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugalcdep.2020.107889"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13011-020-00295-1"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugpo.2023.104001"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/hup.2318"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1093\/bja\/ael078"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1080\/02791072.2002.10399953"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.scijus.2013.08.006"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.forsciint.2017.11.017"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.drugpo.2017.07.010"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/dta.1954"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00213-018-5066-6"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1038\/npp.2012.204"},{"key":"e_1_2_9_17_1","unstructured":"European Monitoring Centre for Drugs and Drug Addiction.European Drug Report 2023: Trends and Developments 2023. 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