{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T15:55:08Z","timestamp":1762271708615},"reference-count":20,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,4,12]],"date-time":"2013-04-12T00:00:00Z","timestamp":1365724800000},"content-version":"vor","delay-in-days":11,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinical Otolaryngology"],"published-print":{"date-parts":[[2013,4]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>To investigate the internal validity of the diagnosis code used at discharge after treatment of acute mastoiditis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Retrospective national re\u2010evaluation study of patient records 1993\u20132007 and make comparison with the original <jats:styled-content style=\"fixed-case\">ICD<\/jats:styled-content> codes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>All <jats:styled-content style=\"fixed-case\">ENT<\/jats:styled-content> departments at university hospitals and one large county hospital department in Sweden.<\/jats:p><\/jats:sec><jats:sec><jats:title>Participants<\/jats:title><jats:p>A total of 1966 records were reviewed for patients with <jats:styled-content style=\"fixed-case\">ICD<\/jats:styled-content> codes for in\u2010patient treatment of acute (529), chronic (44) and unspecified mastoiditis (21) and acute otitis media (1372).<\/jats:p><\/jats:sec><jats:sec><jats:title>Main outcome measures<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">ICD<\/jats:styled-content> codes were reviewed by the authors with a defined protocol for the clinical diagnosis of acute mastoiditis. Those not satisfying the diagnosis were given an alternative diagnosis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 529 records with <jats:styled-content style=\"fixed-case\">ICD<\/jats:styled-content> coding for acute mastoiditis, 397 (75%) were found to meet the definition of acute mastoiditis used in this study, while 18% were not diagnosed as having any type of mastoiditis after review. Review of the in\u2010patients treated for acute media otitis identified an additional 60 cases fulfilling the definition of acute mastoiditis. Overdiagnosis was common, and many patients with a diagnostic code indicating acute mastoiditis had been treated for external otitis or otorrhoea with transmyringeal drainage.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The internal validity of the diagnosis acute mastoiditis is dependent on the use of standardised, well\u2010defined criteria. Reliability of diagnosis is fundamental for the comparison of results from different studies. Inadequate reliability in the diagnosis of acute mastoiditis also affects calculations of incidence rates and statistical power and may also affect the conclusions drawn from the results.<\/jats:p><\/jats:sec>","DOI":"10.1111\/coa.12108","type":"journal-article","created":{"date-parts":[[2013,4,12]],"date-time":"2013-04-12T07:32:45Z","timestamp":1365751965000},"page":"130-135","source":"Crossref","is-referenced-by-count":20,"title":["National assessment of validity of coding of acute mastoiditis: a standardised reassessment of 1966 records"],"prefix":"10.1111","volume":"38","author":[{"given":"J.","family":"Stalfors","sequence":"first","affiliation":[{"name":"Department of Otorhinolaryngology Sahlgrenska University Hospital Gothenburg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Enoksson","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology Helsingborg Hospital Helsingborg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Hermansson","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology Sk\u00e5ne University Hospital Lund Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Hultcrantz","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology Karolinska University Hospital Solna Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00c5.","family":"Robinson","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology Sahlgrenska University Hospital Gothenburg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Stenfeldt","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology Sk\u00e5ne University Hospital Malm\u00f6 Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Groth","sequence":"additional","affiliation":[{"name":"Strama Sk\u00e5ne Lund Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,4,12]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"Dorland's Illustrated Medical Dictionary","author":"Dorland W.A.N.","year":"1994"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00431-007-0549-1"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/MAO.0b013e31817f736b"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1001\/archotol.134.1.45"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2011.08.015"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2012.07.002"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2008.01.013"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2009.05.019"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2007.06.022"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2006.06.009"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2007.02.014"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-5876(00)00425-0"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1177\/000348940511400412"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1001\/archoto.2011.29"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2005.04.009"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00405-006-0085-z"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2007.06.018"},{"key":"e_1_2_7_19_1","first-page":"33","article-title":"Acute mastoiditis in children: review of the current status","volume":"256","author":"Spratley J.","year":"2005","journal-title":"Int. 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