Influenza A-associated severe pneumonia in hospitalized patients: Risk factors and NAI treatments
Authors:
- Zou, Qianda
- Zheng, Shufa
- Wang, Xiaochen
- Liu, Sijia
- Bao, Jiaqi
- Yu, Fei
- Wu, Wei
- Wang, Xianjun
- Shen, Bo
- Zhou, Tieli
- Zhao, Zhigang
- Wang, Yiping
- Chen, Ruchang
- Wang, Wei
- Ma, Jianbo
- Li, Yongcheng
- Wu, Xiaoyan
- Shen, Weifeng
- Xie, Fuyi
- Vijaykrishna, Dhanasekaran
- Chen, Yu
Details:
International Journal of Infectious Diseases, Volume 92, 2020-03-31
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Objective The risk factors and the impact of NAI treatments in patients with severe influenza A-associated pneumonia remain unclear. Methods A multicenter, retrospective, observational study was conducted in Zhejiang, China during a severe influenza epidemic in August 2017–May 2018. Clinical records of patients (>14 y) hospitalized with laboratory-confirmed influenza A virus infection and who developed severe pneumonia were compared to those with mild-to-moderate pneumonia. Risk factors related to pneumonia severity and effects of NAI treatments (monotherapy and combination of peramivir and oseltamivir) were analyzed. Results 202 patients with influenza A-associated severe pneumonia were enrolled, of whom 84 (41.6%) had died. Male gender (OR = 1.782; 95% CI: 1.089–2.917; P = 0.022), chronic pulmonary disease (OR = 2.581; 95% CI: 1.447–4.603; P = 0.001) and diabetes mellitus (OR = 2.042; 95% CI: 1.135–3.673; P = 0.017) were risk factors related to influenza A pneumonia severity. In cox proportional hazards model, severe pneumonia patients treated with double dose oseltamivir (300mg/d) had a better survival rate compared to those receiving a single dose (150 mg/d) (HR = 0.475; 95%CI: 0.254–0.887; P = 0.019). However, different doses of peramivir (300 mg/d vs. 600 mg/d) and combination therapy (oseltamivir-peramivir vs. monotherapy) showed no differences in 60-day mortality (P = 0.392 and P = 0.658, respectively). Conclusions Patients with male gender, chronic pulmonary disease, or diabetes mellitus were at high risk of developing severe pneumonia after influenza A infection. Double dose oseltamivir might be considered in treating influenza A-associated severe pneumonia.