LAUSR

Background Statins are frequently prescribed for patients with dyslipidemia and diabetes mellitus. These comorbidities are highly prevalent in coronavirus disease 2019 (COVID-19) patients. Statin's beneficial effect on mortality in COVID-19 infection has been reported in several studies. However, these findings are still inconclusive. Methods We conducted a retrospective observational study among 6,095 patients with laboratory confirmed COVID-19 hospitalized in Mount Sinai Health System between March 1st 2020 and May 7th 2020. Patients were stratified into two groups: statin use prior to or during hospitalization (N=2,423) versus no statins (N=3,672). We evaluated in-hospital mortality as a primary outcome using propensity score matching and inverse probability treatment weighted (IPTW) analysis. In additional analysis, we compared continuous use of statins (N=1,108) with no statins, continuous use of statins with discontinuation of statins (N=644), and discontinuation of statins with no statins. Results Among 6,095 COVID-19 patients, statin use prior to or during hospitalization group were older (70.8±12.7 years versus 59.2±18.2 years, p<0.001) and had more comorbidities compared to no statins group. After matching by propensity score (1,790 pairs), there were no significant differences in in-hospital mortality between patients with statins and those without [28.9% versus 31.0%, p=0.19, odds ratio (OR) 95% confidence interval (CI): 0.91 (0.79-1.05)]. This result was confirmed by IPTW analysis [OR (95% CI): 0.96 (0.81-1.12), p=0.53]. In the additional analysis comparing continuous use of statins with no statins group, in-hospital mortality was significantly lower in continuous use of statins compared to no statins group [26.3% versus 34.5%, p<0.001, OR (95% CI): 0.68 (0.55-0.82)] after matching by propensity score (944 pairs), as well as IPTW analysis [OR (95% CI): 0.77 (0.64-0.94), p=0.009]. Finally, comparison of continuous use of statins with discontinuation of statins showed lower in-hospital mortality in continuous use of statins group [27.9% versus 42.1%, p<0.001, OR (95% CI): 0.53 (0.41-0.68)]. Conclusions Use of statins prior to or during hospitalization was not associated with a decreased risk of in-hospital mortality, however, continuous use of statins was associated with lower in-hospital mortality compared to no statin use and discontinuation of statins.