SFTPD and acute respiratory distress syndrome: In a consistent manner, increasing circulating levels in the kinetic of SP-D between D1 and D14 was associated with a 12-fold lower risk of ARDS onset (0.077 [0.004–0.24]; p = 0.077), with the neutrophil-to-lymphocyte ratio on D1 and increase in SP-D circulating levels as confounding variables.