Salford Royal Hospital, UK.
Lancaster University, UK.
Health Inf Manag. 2020 Jan;49(1):58-61. doi: 10.1177/1833358318819105. Epub 2018 Dec 18.
Intracranial venous thrombosis (ICVT) accounts for around 0.5% of all stroke cases. There have been no previously published studies of the International Classification of Diseases, Tenth Edition (ICD-10) validation for the identification of ICVT admissions in adults.
The aims of this study were to validate and quantify the performance of the ICD-10 coding system for identifying cases of ICVT in adults and to derive an estimate of incidence.
Administrative data were collected for all patients admitted to a regional neurosciences centre over a 5-year period. We searched for the following ICD-10 codes at any position: G08.X (intracranial and intraspinal phlebitis and thrombophlebitis), I67.6 (non-pyogenic thrombosis of intracranial venous system), I63.6 (cerebral infarction due to cerebral venous thrombosis, non-pyogenic), O22.5 (cerebral venous thrombosis in pregnancy) and O87.3 (cerebral venous thrombosis in the puerperium).
Sixty-five admissions were identified by at least one of the relevant ICD-10 codes. The overall positive predictive value (PPV) for confirmed ICVT from all of the admissions combined was 92.3% (60 out of 65) with the results for each code as follows: G08.X 91.5% (54 of 59), O22.5 100% (4 of 4), I67.6 100% (1 of 1), I63.6 100% (1 of 1) and O87.3 100% (1 of 1). There were 40 unique cases of ICVT over a 5-year period giving an annual incidence of ICVT of 5 per million.
All codes gave a high PPV.
As demonstrated in previous studies, the incidence of ICVT may be higher than previously thought.
颅内静脉血栓形成（ICVT）约占所有中风病例的 0.5%。以前没有发表过关于第十版国际疾病分类（ICD-10）验证用于识别成人 ICVT 入院的研究。
本研究的目的是验证和量化 ICD-10 编码系统识别成人 ICVT 病例的性能，并估计发病率。
在 5 年期间，收集了所有入住区域神经科学中心的患者的行政数据。我们在任何位置搜索以下 ICD-10 代码：G08.X（颅内和脊髓静脉炎和血栓性静脉炎）、I67.6（非化脓性颅内静脉系统血栓形成）、I63.6（脑静脉血栓形成引起的脑梗死，非化脓性）、O22.5（妊娠期间的脑静脉血栓形成）和 O87.3（产褥期脑静脉血栓形成）。
至少有一种相关 ICD-10 代码确定了 65 例入院。所有入院患者中确诊 ICVT 的总阳性预测值（PPV）为 92.3%（60 例），每个代码的结果如下：G08.X 91.5%（54 例），O22.5 100%（4 例），I67.6 100%（1 例），I63.6 100%（1 例），O87.3 100%（1 例）。在 5 年内有 40 例独特的 ICVT 病例，每年发病率为每百万 5 例。
所有代码的 PPV 均较高。
如前研究所示，ICVT 的发病率可能高于先前的估计。
