論文No2145

Characteristics and association with survival of respiratory-related hospitalization in Japanese idiopathic pulmonary fibrosis patients
Osamu Nishiyama, Sho Saeki, Ryo Yamazaki, Hiroyuki Sano, ... Yuji Tohda
Respiratory Investigation, Volume 57, Issue 5, September 2019, Pages 415-421

 

 

 

 

<背景>

 

 

特発性肺線維症(IPF)患者の呼吸器関連入院の特徴、意義についてはアジア諸国でよくわかっていない。

この研究の目的は日本の実臨床においてIPF患者の呼吸器関連入院を検討し、

呼吸器関連入院とその後の生存との関連を調べることである。


<方法>

IPF患者で2008年2月から2017年8月までに臨床評価を行った人をスクリーニングした。

IPFと診断後1年以内に評価を行った群のみを対象とした。

診断後の肺機能を登録ポイントとした。

その後6か月後に生存している群のみにランドマーク的解析を行った。

登録後6か月以内の呼吸器関連入院の特徴と生存との関連を検討した。


<結果>

106名のIPF患者が登録された。

登録時の平均FVCは80.2 ± 25.1%であった。

17名(16.0%)が登録後6か月以内に呼吸器関連入院をしていた。

肺炎が原因として最多(47%)で、IPF急性増悪(29.4%)がつづいた。

多変量解析で、%FVC(hazard ratio: 0.98, 95% confidence interval: 0.96–0.99, p = 0.004)、

6か月の%FVCの減少(1.05, 1.02–1.08, 0.005)、

呼吸器関連入院(2.45, 1.24–4.85, 0.009)が有意に生存に関連していた。


<感想>

日本のIPF患者の呼吸器関連入院は肺炎が最多だったようです。呼吸器関連入院があるとその後の予後が悪かったようです。

 

 

 

 

 


Background
The characteristics and significance of respiratory-related hospitalization in patients with idiopathic pulmonary fibrosis (IPF) in Asian countries remain unknown. The purpose of this study was to define the characteristics of respiratory-related hospitalization and to inspect the relationship between respiratory-related hospitalization and subsequent survival in patients with IPF in Japanese general practice.

Methods
Patients with IPF who underwent clinical evaluation between February 2008 and August 2017 were screened. Only those who had undergone evaluation within 1 year after the diagnosis of IPF were included in the study. The post-diagnosis pulmonary function tests were considered the registration point. We then performed a 6-month landmark analysis including only patients who were alive 6 months after the registration. The characteristics of respiratory-related hospitalizations during the 6 months after registration and the association between respiratory-related hospitalization and survival were investigated.

Results
A total of 106 patients with IPF were included in the study. The mean forced vital capacity (FVC) at registration was 80.2 ± 25.1% predicted. Seventeen patients (16.0%) had respiratory-related hospitalization during the 6 months after registration. Pneumonia was the most frequent reason for hospitalization (47.0%), followed by acute exacerbation of IPF (29.4%). In multivariate analysis, % predicted FVC (hazard ratio: 0.98, 95% confidence interval: 0.96–0.99, p = 0.004), 6-month decrease in % predicted FVC (1.05, 1.02–1.08, 0.005), and respiratory-related hospitalization (2.45, 1.24–4.85, 0.009) were significantly associated with survival.

Conclusions
Pneumonia is the most frequent cause of respiratory-related hospitalization in Japanese IPF patients. Furthermore, respiratory-related hospitalization is significantly associated with subsequent poor survival.