Pneumonia After Bacterial or Viral Infection Preceded or Followed by Radiation Exposure: A Reanalysis of Older Radiobiologic Data and Implications for Low-Dose Radiation Therapy for Coronavirus Disease 2019 Pneumonia.

There is a highly significant decreasing trend ( P < .001) of mortality with postinoculation dose in the data set of Lieberman et al 6 with EOR per Gy = −0.23 (95% CI, −0.24 to −0.16; Table 2 , Table E2 ), as also shown by Figure 1 .

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However, there is a borderline significant decreasing trend ( P = .029) of mortality with preinoculation dose in this data set, with EOR/Gy = −0.62 (95% CI, −0.90 to −0.09; Table 2 , Table E7 ) again confirmed by Figure 1 .

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