Key result
In patients with scrub typhus, the presence of interstitial pneumonia was associated with significantly higher rates of hypoxia (32.6% vs 14.2%) and other markers of disease severity compared to those without interstitial pneumonia.
Why the study?
Is the presence of interstitial pneumonia associated with increased disease severity in patients with scrub typhus?
Observational (n=101)
Single-blind
No
Is the presence of interstitial pneumonia associated with increased disease severity in patients with scrub typhus?
Absolute Event Rate: 32.6% vs 14.2%
p-value: p=0.030
Interstitial pneumonia is a frequent chest radiographic finding in scrub typhus and serves as a clinical marker for increased disease severity and morbidity.
May flag higher-risk scrub typhus cases for monitoring; leaves open prospective validation and management impact.
Interstitial pneumonia (IP) frequently occurs in patients with scrub typhus, but its clinical significance is not well known. This study was designed to evaluate interstitial pneumonia as a marker of severity of the disease for patients with scrub typhus. We investigated clinical parameters representing the severity of the disease, and the chest radiographic findings for 101 patients with scrub typhus. We then compared these clinical factors between patients with and without IP. We also studied the relationship between IP and other chest radiographic findings. The chest radiography showed IP (51.4%), pleural effusion (42.6%), cardiomegaly (14.9%), pulmonary alveolar edema (20.8%), hilar lymphadenopathy (13.8%) and focal atelectasis (11.8%), respectively. The patients with IP (n=52) had higher incidences in episode of hypoxia (p=0.030), hypotension (p=0.024), severe thrombocytopenia (p=0.036) and hypoalbuminemia (p=0.013) than the patients without IP (n=49). The patients with IP also had higher incidences of pleural effusion (p<0.001), focal atelectasis (p=0.019), cardiomegaly (p<0.001), pulmonary alveolar edema (p=0.011) and hilar lymphadenopathy (p<0.001) than the patients without IP. Our data suggest that IP frequently occurs for patients with scrub typhus and its presence is closely associated with the disease severity of scrub typhus.
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Song et al. (2004) conducted an observational in Scrub typhus (n=101). Interstitial pneumonia vs. Absence of interstitial pneumonia was evaluated on Incidence of hypoxia (p=0.030). In patients with scrub typhus, the presence of interstitial pneumonia was associated with significantly higher rates of hypoxia (32.6% vs 14.2%) and other markers of disease severity compared to those without interstitial pneumonia.
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