- 著者
- Keisuke Anan Yuki Kataoka Kazuya Ichikado Kodai Kawamura Takeshi Johkoh Kiminori Fujimoto Kazunori Tobino Ryo Tachikawa Hiroyuki Ito Takahito Nakamura Tomoo Kishaba Minoru Inomata Yosuke Yamamoto
- 出版者
- Society for Clinical Epidemiology
- 雑誌
- Annals of Clinical Epidemiology (ISSN:24344338)
- 巻号頁・発行日
- pp.22008, (Released:2022-02-09)
- 被引用文献数
- 4
Background: This study aimed to develop criteria for identifying patients with acute exacerbation of idiopathic pulmonary fibrosis (AE-IPF) from Japanese administrative data and validate the pre-existing criteria.Methods: This retrospective, multi-center validation study was conducted at eight institutes in Japan to verify the diagnostic accuracy of the disease name for AE-IPF. We used the Japanese Diagnosis Procedure Combination data to identify patients with a disease name that could meet the diagnostic criteria for AE-IPF, who were admitted to the eight institutes from January 2016 to February 2019. As a reference standard, two respiratory physicians performed a chart review to determine whether the patients had a disease that met the diagnostic criteria for AE-IPF. Furthermore, two radiologists interpreted the chest computed tomography findings of cases considered AE-IPF and confirmed the diagnosis. We calculated the positive predictive value (PPV) for each disease name and its combination. Results: We included 830 patients; among them, 216 were diagnosed with AE-IPF through the chart review. We combined the groups of disease names and yielded two criteria: the criteria with a high PPV (0.72 [95% confidence interval 0.62 to 0.81]) and that with a slightly less PPV (0.61 [0.53 to 0.68]) but more true positives. Pre-existing criteria showed a PPV of 0.40 (0.31 to 0.49).Conclusion: The criteria derived in this study for identifying AE-IPF from Japanese administrative data show a fair PPV. Although these criteria should be carefully interpreted according to the target population, our findings could be utilized in future database studies on AE-IPF.
- 著者
- Hideto Kameda Hitoshi Tokuda Fumikazu Sakai Takeshi Johkoh Shunsuke Mori Yuji Yoshida Noboru Takayanagi Hirofumi Taki Yoshinori Hasegawa Kazuhiro Hatta Hisashi Yamanaka Makoto Dohi Shu Hashimoto Hidehiro Yamada Shinichi Kawai Tsutomu Takeuchi Kazuhiro Tateda Hajime Goto
- 出版者
- The Japanese Society of Internal Medicine
- 雑誌
- Internal Medicine (ISSN:09182918)
- 巻号頁・発行日
- vol.50, no.4, pp.305-313, 2011 (Released:2011-02-15)
- 参考文献数
- 25
- 被引用文献数
- 27 60
Objective Acute-onset diffuse interstitial lung disease (AoDILD) in patients with rheumatoid arthritis (RA) has been a serious concern, especially for those under treatment with biological agents which may affect the presentation and outcome of AoDILD, including Pneumocystis pneumonia (PCP). Therefore, we conducted a retrospective, multi-center study of AoDILD in RA patients receiving biological agents. Methods Patients who developed AoDILD while receiving biological agents (infliximab, etanercept, adalimumab and tocilizumab) were enrolled in the study. Definite PCP was defined as patients who showed either P. jirovecii organisms in their respiratory samples by microscopic examination, or positive tests for both P. jirovicii DNA-PCR with respiratory samples and an elevated serum 1,3-β-D-glucan level above the cut-off value. Probable PCP was defined as either a positive test for P. jirovicii PCR or an elevated serum β-D-glucan level. Chest HRCT findings were evaluated and scored by two board-certified radiologists. Results The final diagnoses for 26 patients examined were definite PCP for 13 patients, probable PCP for 11, and methotrexate-associated pneumonitis in 2 patients. Definite and probable PCP cases were clinically indistinguishable. Generalized, diffuse ground-glass opacity (GGO) is the characteristic HRCT finding in patients with definite or probable PCP, which was different from our previous findings in RA patients, mostly without biologics, showing GGO distributed in a panlobular or multilobular manner. The clinical outcome was favorable by treatment with trimethoprim-sulfamethoxazole and glucocorticoids. Conclusion The possibility of PCP should be intensively investigated in RA patients developing AoDILD while receiving biological agents.
- 著者
- Sadatomo Tasaka Hitoshi Tokuda Fumikazu Sakai Takeshi Fujii Kazuhiro Tateda Takeshi Johkoh Norio Ohmagari Hiromitsu Ohta Hideki Araoka Yoshimi Kikuchi Masahide Yasui Kanako Inuzuka Hajime Goto
- 出版者
- The Japanese Society of Internal Medicine
- 雑誌
- Internal Medicine (ISSN:09182918)
- 巻号頁・発行日
- vol.49, no.4, pp.273-281, 2010 (Released:2010-02-15)
- 参考文献数
- 21
- 被引用文献数
- 24 61
Background The clinical features of pneumocystis pneumonia (PCP) differ according to the predisposing factors responsible for immunosuppression. Although PCP in patients with acquired immunodeficiency syndrome (AIDS) has been extensively described, its characteristics in non-AIDS patients, such as those with malignancies, are not thoroughly documented. Study objective To characterize and compare the clinical and imaging features of PCP in patients with malignancies with those in AIDS patients. Design A multi-center retrospective study. Patients and Measurements We evaluated the clinical and radiological features of PCP in 21 patients with malignancies and in 17 with AIDS. Clinical presentation, serum markers, oxygenation, CT findings, and outcome were examined. Results The patients with malignancies showed shorter durations of symptoms before PCP was diagnosed. The levels of serum markers and the oxygenation index did not differ. CT showed diffuse or widespread ground-glass opacity (GGO) in all of the patients evaluated. None of the AIDS patients demonstrated consolidation, whereas half of the patients with malignancy showed consolidation along with GGO. The extent of GGO scored on CT images was significantly greater in the AIDS patients. No correlation was observed between the CT findings and other clinical parameters. All of the AIDS patients recovered from PCP, whereas six patients with malignancies died within a month after the onset of PCP. Conclusion The characteristics of the CT images differed between the patient groups with different underlying disorders, although it remains to be determined whether CT findings are associated with other clinical features or are predictive of the outcome of PCP.