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要約 目的:Vogt-小柳-原田病(VKHD)は活動期に脈絡膜が急激に肥厚する。今回筆者らは,VKHDの治療経過中に光干渉断層計で測定した中心窩下脈絡膜厚(SCT)と症候性再燃との関連を検討した。
対象と方法:2019年5月〜2023年5月に昭和医科大学病院附属東病院を初診した初発VKHD患者を対象とし,症候性再燃の有無により再燃群,非再燃群に分類した。治療開始前,治療開始後1週,2週,1か月,3か月,6か月,12か月後のSCT値を両群で後方視的に検討した。
結果:再燃群8例16眼,非再燃群13例26眼であった。治療開始前のSCTの平均値は,再燃群848±132μm,非再燃群680±234μmで,再燃群で有意に大きかった(p<0.01)。治療開始前のSCT値による症候性再燃の有無を目的変数としたロジスティック回帰分析を行ったところ,治療開始前のSCTが大きいほど,症候性再燃のリスクが有意に高かった(β=0.00567,p=0.008,オッズ比=1.0051,95% CI:1.0013〜1.0089)。
結論:治療開始前にSCTが厚い例は症候性再燃を起こすリスクが高い可能性が示されたが,脈絡膜厚に影響するさまざまな要因を排除することが困難であった。
Abstract Purpose:In Vogt-Koyanagi-Harada disease(VKHD), the choroid thickens rapidly during the active phase. In this study, we investigated the relationship between subfoveal choroidal thickness(SCT) measured using optical coherence tomography during treatment of VKHD and symptomatic relapse.
Subjects and methods:Patients with newly diagnosed VKHD who first visited SHOWA Medical University East Hospital between May 2019 and May 2023 were included, and were classified into a relapse group and a non-relapse group based on the presence or absence of symptomatic relapse. SCT values before the start of treatment, and 1 week, 2 weeks, 1 month, 3 months, 6 months, and 12 months after treatment were retrospectively examined in both groups.
Results:The mean SCT before the start of treatment was 848±132 μm in the relapse group and 680±234 μm in the non-relapse group, which was significantly higher in the relapse group(p<0.01). Logistic regression analysis was performed using the presence or absence of symptomatic relapse according to the SCT value before the start of treatment as the dependent variable, and the risk of symptomatic relapse was significantly higher with a higher SCT before the start of treatment(β=0.00567, p=0.008, odds ratio=1.0051, 95% CI:1.0013-1.0089).
Conclusion:It was suggested that patients with a thicker SCT before the start of treatment may have a higher risk of symptomatic relapse, but it was difficult to exclude various factors that affect choroidal thickness.

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