- 著者
- Yuki Kataoka Tomohisa Baba Tatsuyoshi Ikenoue Yoshinori Matsuoka Junichi Matsumoto Junji Kumasawa Kentaro Tochitani Hiraku Funakoshi Tomohiro Hosoda Aiko Kugimiya Michinori Shirano Fumiko Hamabe Sachiyo Iwata Yoshiro Kitamura Tsubasa Goto Tomohiro Handa Shoji Kido Shingo Fukuma Noriyuki Tomiyama Toyohiro Hirai Takashi Ogura Japan COVID-19 AI team
- 出版者
- Society for Clinical Epidemiology
- 雑誌
- Annals of Clinical Epidemiology (ISSN:24344338)
- 巻号頁・発行日
- pp.22014, (Released:2022-07-08)
- 被引用文献数
- 2
Background: We aimed to develop and externally validate a novel machine learning model that can classify CT image findings as positive or negative for SARS-CoV-2 reverse transcription polymerase chain reaction (RT-PCR).Methods: We used 2,928 images from a wide variety of case-control type data sources for the development and internal validation of the machine learning model. A total of 633 COVID-19 cases and 2,295 non-COVID-19 cases were included in the study. We randomly divided cases into training and tuning sets at a ratio of 8:2. For external validation, we used 893 images from 740 consecutive patients at 11 acute care hospitals suspected of having COVID-19 at the time of diagnosis. The dataset included 343 COVID-19 patients. The reference standard was RT-PCR.Results: In external validation, the sensitivity and specificity of the model were 0.869 and 0.432, at the low-level cutoff, 0.724 and 0.721, at the high-level cutoff. Area under the receiver operating characteristic was 0.76.Conclusions: Our machine learning model exhibited a high sensitivity in external validation datasets and may assist physicians to rule out COVID-19 diagnosis in a timely manner at emergency departments. Further studies are warranted to improve model specificity.
- 著者
- Kazuaki Kameda Michinori Shirano Yoshiro Hadano Yu Kasamatsu Tadahiro Nakamura Makiko Ota Tetsushi Goto
- 出版者
- The Japanese Society of Internal Medicine
- 雑誌
- Internal Medicine (ISSN:09182918)
- 巻号頁・発行日
- vol.54, no.5, pp.513-518, 2015 (Released:2015-03-01)
- 参考文献数
- 30
- 被引用文献数
- 1 4
Polyradiculopathy (PRP) is a rare but serious neurologic complication of cytomegalovirus (CMV) in patients with acquired immunodeficiency syndrome (AIDS). We herein report three cases of CMV PRP in patients with AIDS. Although providing a prompt diagnosis and initiating anti-CMV therapy may achieve clinical improvements, administering single-drug treatment may result in virologic failure. Therefore, introducing antiretroviral therapy is a key step for improving the treatment outcomes of CMV PRP.