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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Vestnik dermatologii i venerologii</journal-id><journal-title-group><journal-title xml:lang="en">Vestnik dermatologii i venerologii</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник дерматологии и венерологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0042-4609</issn><issn publication-format="electronic">2313-6294</issn><publisher><publisher-name xml:lang="en">Rossijskoe Obschestvo Dermatovenerologov i Kosmetologov</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1322</article-id><article-id pub-id-type="doi">10.25208/vdv1322</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL STUDIES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>НАУЧНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The age at first cutaneous manifestation of psoriasis as a prognostic factor in the timing of psoriatic arthritis diagnosis</article-title><trans-title-group xml:lang="ru"><trans-title>Возраст пациента при первых клинических проявлениях псориаза как прогностический фактор сроков установления диагноза псориатического артрита</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0662-2682</contrib-id><contrib-id contrib-id-type="scopus">57205267691</contrib-id><contrib-id contrib-id-type="spin">6372-2237</contrib-id><name-alternatives><name xml:lang="en"><surname>Bogdanova</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Богданова</surname><given-names>Елена Витальевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>bogdanova@cnikvi.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">State Research Center of Dermatovenereology and Cosmetology</institution></aff><aff><institution xml:lang="ru">Государственный научный центр дерматовенерологии и косметологии</institution></aff></aff-alternatives><content-language>ru</content-language><pub-date date-type="pub" publication-format="electronic" iso-8601-date="2022-09-19"><day>19</day><month>09</month><year>2022</year></pub-date><pub-date date-type="collection"><year>2022</year></pub-date><volume>98</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>41</fpage><lpage>48</lpage><history><date date-type="received" iso-8601-date="2022-04-18"><day>18</day><month>04</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-05-11"><day>11</day><month>05</month><year>2022</year></date></history><pub-history><event event-type="received"><event-desc>Received:<date date-type="received" iso-8601-date="2022-04-18"><day>18</day><month>04</month><year>2022</year></date></event-desc></event><event event-type="accepted"><event-desc>Accepted:<date date-type="accepted" iso-8601-date="2022-05-11"><day>11</day><month>05</month><year>2022</year></date></event-desc></event><event event-type="pub"><event-desc>Published:<pub-date date-type="pub" publication-format="electronic" iso-8601-date="2022-09-19"><day>19</day><month>09</month><year>2022</year></pub-date></event-desc></event></pub-history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Bogdanova E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Богданова Е.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Bogdanova E.V.</copyright-holder><copyright-holder xml:lang="ru">Богданова Е.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://vestnikdv.ru/jour/article/view/1322">https://vestnikdv.ru/jour/article/view/1322</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Psoriatic arthritis is a chronic inflammatory disease of joints, spine and enthesis, which develops in 6–40% of patients with psoriasis and has a significant impact on the quality of life of patients.</p> <p><bold>Aims.</bold> To determine the relationship between age of cutaneous manifestation of psoriasis and the timing of psoriatic arthritis diagnosis; to examine the possibility of prediction of timing of psoriatic arthritis diagnosis depending on age of cutaneous manifestation of psoriasis.</p> <p><bold>Materials and methods.</bold> Data of patients aged 18 years and older with psoriatic arthritis included in the psoriasis patient register were analysed. Inclusion criteria were: patient age 18 years and older; established diagnosis of psoriasis and psoriatic arthritis. Exclusion criteria were: psoriatic arthritis diagnosed before or simultaneously with cutaneous manifestation of psoriasis; the age of the cutaneous manifestation of psoriasis older than 70 years. The sample included 771 patients.</p> <p>Spearman's correlation analysis was used to assess the correlation between age of cutaneous manifestation of psoriasis and period from skin psoriasis onset to psoriatic arthritis diagnosis.</p> <p>The possibility of prediction of the period till psoriatic arthritis was diagnosed depending on age at cutaneous manifestation of psoriasis was established by means of quantile regression analysis.</p> <p><bold>Results.</bold> Mean age at cutaneous manifestation of psoriasis (±SD) was 26.0 ± 13.5 years. The period from the onset of skin psoriasis to the diagnosis of psoriatic arthritis averaged 13.7 ± 10.3 years, its median [interquartile range] was 12 [6–19] years.</p> <p>According to Spearman's correlation analysis, a moderate (close to strong) negative correlation between varibles was revealed (Spearman's correlation coefficient = –0.490, <italic>p</italic> &lt; 0.0005).</p> <p>In accordance to quantile regression analysis, lines of 5, 25, 50, 75 and 95% quantiles were obtained and the dependence of the period till the diagnosis of psoriatic arthritis on the age of onset of skin psoriasis was demonstrated. Based on the quantile equation obtained, a prognostic table for the period from the onset of skin psoriasis to the diagnosis of psoriatic arthritis was compiled.</p> <p><bold>Conclusions.</bold> Statistically significant inverse relationship between age of cutaneous manifestation of psoriasis and period till psoriatic arthritis diagnosis was established: older age at skin psoriasis onset is associated with shorter period till psoriatic arthritis diagnosis. Based on established relationship, presented as an equation, table and graphically, prediction of period till psoriatic arthritis diagnosis is possible. These results can be used in the clinical practice of dermatovenereologists.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Псориатический артрит представляет собой хроническое воспалительное заболевание суставов, позвоночника и энтезисов, развивающееся у 6–40% больных псориазом и оказывающее существенное влияние на качество жизни пациентов.</p> <p><bold>Цель исследования.</bold> Определить наличие зависимости между возрастом первых клинических проявлений псориаза и сроком установления диагноза псориатического артрита; оценить возможность прогнозирования сроков установления диагноза псориатического артрита в зависимости от возраста первых клинических проявлений псориаза.</p> <p><bold>Методы.</bold> Выполнен анализ данных пациентов, включенных в регистр пациентов с псориазом РОДВК. Критерии включения в анализ: возраст пациента 18 лет и старше; установленный диагноз псориаза и псориатического артрита. Критерии невключения: установление диагноза псориатического артрита до или одновременно с манифестацией кожных проявлений псориаза; возраст первых клинических проявлений (начала) псориаза старше 70 лет. В выборку был включен 771 пациент.</p> <p>Наличие корреляции между двумя переменными определяли посредством корреляционного анализа Спирмена.</p> <p>Для прогнозирования продолжительности периода до установления диагноза псориатического артрита в зависимости от возраста пациента при первых клинических проявлениях псориаза использовали метод квантильного регрессионного анализа; в качестве независимой переменной был включен возраст первых клинических проявлений псориаза на коже, в качестве зависимой — продолжительность периода до установления диагноза псориатического артрита.</p> <p><bold>Результаты.</bold> Средний возраст при первых клинических проявлениях псориаза на коже (± стандартное отклонение) был равен 26,0 ± 13,5 года. Продолжительность периода времени от начала псориаза до установления диагноза псориатического артрита в среднем составляла 13,7 ± 10,3 года, ее медиана [межквартильный интервал] — 12 [6–19] лет.</p> <p>По результатам корреляционного анализа Спирмена была выявлена умеренная (пограничная с сильной) отрицательная корреляция между исследуемыми переменными (коэффициент корреляции Спирмена = –0,490, <italic>р</italic> &lt; 0,0005).</p> <p>По результатам квантильного регрессионного анализа были получены линии 5, 25, 50, 75 и 95% квантилей и продемонстрировано наличие значимой зависимости продолжительности периода до установления диагноза псориатического артрита от возраста начала псориаза. На основании полученного уравнения для линий квантилей была составлена прогностическая таблица для оценки продолжительности периода времени от начала псориаза до установления диагноза псориатического артрита.</p> <p><bold>Заключение.</bold> Установлена статистически значимая обратная зависимость между возрастом начала псориаза и сроком установления диагноза псориатического артрита: более старший возраст при первых клинических проявлениях псориаза на коже связан с укорочением сроков установления диагноза псориатического артрита. На основании установленной зависимости, представленной в виде формулы, графика и таблицы, возможно прогнозирование продолжительности периода до установления диагноза псориатического артрита. Полученные результаты могут быть использованы врачами-дерматовенерологами в клинической практике.</p></trans-abstract><kwd-group xml:lang="en"><kwd>psoriasis</kwd><kwd>age of onset</kwd><kwd>psoriatic arthritis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>псориаз</kwd><kwd>возраст начала псориаза</kwd><kwd>псориатический артрит</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Псориаз артропатический. Псориатический артрит. Клинические рекомендации Российского общества дерматовенерологов и косметологов и Ассоциации ревматологов России. 2021. Доступно: http://www.cr.minzdrav.gov.ru/schema/562_2. [Psoriasis arthropathic. Psoriatic arthritis. Clinical guidelines of Russian society of dermatovenereologists and cosmetologists and Association of rheumatologists of Russia. 2021. 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