The association between abnormal serum magnesium levels and prognosis of elderly patients with community-acquired pneumonia.

To investigate the association between abnormal serum magnesium levels and the prognosis of elderly patients with community-acquired pneumonia (CAP). Methods: A retrospective study was conducted on 1381 elderly patients with CAP in the First Hospital of Qinhuangdao between January 2015 and December 2018. Serum magnesium concentrations in the range of 0.