{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T06:13:25Z","timestamp":1771481605572,"version":"3.50.1"},"reference-count":17,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2007,9,30]],"date-time":"2007-09-30T00:00:00Z","timestamp":1191110400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>The effect of a common habit among Yemeni population on the periodontal status was investigated. This cross-sectional study was done on 2500 Yemenis with mean age 27.01 years (1818 males and 682 females). Among these 1528 were qat chewers and 972 were non-chewers. Detailed questionnaire and pre-designed scoring system for the periodontal status were employed for each case. Study results indicated that out of 972 non-chewers 116(12%) had periodontal pocketing and 18 (1.9%) cases had gingival recession. On the other hand, out of 1528 chewers, 468 (31.8%) had periodontal pockets and 98 (6.4%) with gum bleeding, p<\/jats:p>","DOI":"10.3390\/ijerph2007030008","type":"journal-article","created":{"date-parts":[[2008,10,25]],"date-time":"2008-10-25T13:52:15Z","timestamp":1224942735000},"page":"243-247","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Qat Habit in Yemen Society: A Causative Factor for Oral Periodontal Diseases"],"prefix":"10.3390","volume":"4","author":[{"given":"Aiman A.","family":"Ali","sequence":"first","affiliation":[{"name":"Department of Oral Pathology and Medicine, Faculty of Dentistry, University of Sana\u2019a, Yemen"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2007,9,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"11","DOI":"10.5507\/bp.2004.002","article-title":"Khat habit and its health effect. 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Cancer."},{"key":"ref_10","first-page":"565","article-title":"Head and neck squamous cell carcinoma in Hajjah, Yemen","volume":"21","author":"Nasr","year":"2000","journal-title":"Saudi Med J."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1016\/0030-4220(87)90255-6","article-title":"The oral and dental effects of qat chewing","volume":"63","author":"Hill","year":"1987","journal-title":"Oral Surg Oral Med Oral Pathol Oral Radiol Endod."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"310","DOI":"10.1111\/j.1600-0528.1986.tb01079.x","article-title":"Periodontal conditions in adults 35\u201344 years of age: an overview of CPITN data in the WHO global oral data bank","volume":"14","author":"Pilot","year":"1986","journal-title":"Community Dental Oral Epidemiology"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"336","DOI":"10.1111\/j.1600-0528.1987.tb01748.x","article-title":"Periodontal conditions in adults 15\u201319 years of age: an overview of CPITN data in the WHO global oral data bank","volume":"15","author":"Pilot","year":"1987","journal-title":"Community Dental Oral Epidemiology"},{"key":"ref_14","first-page":"13","article-title":"CPITN application in regular dental practice","volume":"80","author":"Mengel","year":"1992","journal-title":"Deutche Zahn-, Mund-Kieferheilkunde"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"752","DOI":"10.1111\/j.1600-051X.1993.tb00702.x","article-title":"Periodontal health of the population in Eastern Germany (former GDR)","volume":"20","author":"Mengel","year":"1993","journal-title":"J Clin Periodontol"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1111\/j.1600-051X.1996.tb00571.x","article-title":"Periodontal status of a subject sample of Yemen","volume":"23","author":"Reiner","year":"1996","journal-title":"J Clin Periodontol"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1111\/j.1399-302X.2004.00195.x","article-title":"Effect of khat chewing on 14 selected periodontal bacteria in sub-and supragingival plaque of a young male population","volume":"20","author":"Skaug","year":"2005","journal-title":"Oral Microbiology Immunology"}],"container-title":["International Journal of Environmental Research and Public Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1660-4601\/4\/3\/243\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:24:17Z","timestamp":1760221457000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1660-4601\/4\/3\/243"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,9,30]]},"references-count":17,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2007,9]]}},"alternative-id":["ijerph2007030008"],"URL":"https:\/\/doi.org\/10.3390\/ijerph2007030008","relation":{},"ISSN":["1660-4601"],"issn-type":[{"value":"1660-4601","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,9,30]]}}}