Review Article

Improved COVID-19 Outcomes following Statin Therapy: An Updated Systematic Review and Meta-analysis

Table 1

Characteristics of included studies.

ICU admission
AuthorStatinSampleSettingStudy designResultConclusionReference
UserNonuser
Masana et al.5811576Patients admitted to their hospitals because of SARS-CoV-2 infectionMembers of the Lipids and Arteriosclerosis Units Net (XULA) of Catalonia (Spain)Retrospective observationalN/AN/A[30]
103 (17.7)233 (14.8)
Zhang et al.121912762Patients with COVID-19Hubei Province, ChinaRetrospectiveaHR: 0.69, CI: 0.56-0.85, Cox model analysis showed statin use associated with lower prevalence ICU admission[25]
N/AN/A
Song et al.123126Patients with COVID-19“Lifespan” healthcare system hospitalsRetrospective cohortOR: 0.90, CI: 0.49-1.67, No significant associations between statin use and hospital death or ICU admission[31]
N/AN/A
Argenziano et al.325525Patients with laboratory-confirmed COVID-19 infectionNew York-Presbyterian/Columbia University Irving Medical Center, a quaternary care academic medical centerRetrospective case series, CI: 0.79-1.46N/A[32]
93143
De Spiegeleer et al.31123Residents at two elderly care homes with COVID-19 diagnosisOne of two Belgian nursing homesRetrospective multicenter cohortOR: 0.75, CI: 0.24-1.87Statin use showed nonsignificant benefits[33]
631
Yan et al.N/AN/AConfirmed COVID-19 diagnosisHospitals in Zhejiang Province, ChinaCase-controlOR: 0.98, CI: 0.32-2.99, N/A[34]
N/AN/A
Dreher et al.1832COVID-19 patients with and without acute respiratory distress syndrome (ARDS)Aachen University HospitalRetrospective cohortOR: 1.13, CI: 0.36-3.60N/A[35]
915
Tan et al.40509717 patients admittedTertiary center in Singapore for COVID-19 infectionRetrospective cohortATET Coeff: − 0.12, CI: −0.23-0.01, Statin use independently associated with lower requirement for ICU admission[36]
1N/A
Daniels et al.46124Patients hospitalized for treatment of COVID-19University of California San Diego Health (UCSDH), ascertained by data capture within system-wide electronic health record (EHR) system (Epic Systems, Verona, WI, USA)Retrospective cohortAdjusted OR: 0.29, CI: 0.11-0.71, Inpatients hospitalized for COVID-19, use of statin medication prior to admission associated with reduced risk of severe disease[37]
2070
Vahedian-Azimi et al.326525Positive for SARS-CoV-2Baqiyatallah University of Medical SciencesProspective observationalOR: 1.00, CI: 0.58-1.74, Statin use not associated with mortality[10]
39243
Butt et al.8433999Danish citizens had a primary or secondary diagnosis code for COVID-19 infectionA Danish hospital, including inpatient, outpatient, and emergency department visitsObservational cohort studyHR 2.41 (95% CI 2.04 to 2.85)Statin exposure was associated with a significantly higher risk of severe COVID-19 infection compared with no statin exposure)severe COVID-19 infection, defined as a hospital diagnosis of “COVID-19 severe acute respiratory syndrome” (ICD-10 code: B972A) or admission to an intensive care unit([38]
204 (24.2%)419 (10.5%)
Fan et al.2501897Patients with COVID-19Zhongnan Hospital of Wuhan University and Leishenshan Hospital in Wuhan, ChinaRetrospective studyAdjusted HR, 0.319; 95% CI, 0.270–0.945; The risk was lower for intensive care unit (ICU) care in the statin group vs. the nonstatin group[39]
N/AN/A
Hippisley-Cox et al.561613870Patients who had COVID-19 diseaseGeneral practices in England contributing to the QResearch database from which current data were available, EnglandProspective cohort study (1.02-1.43)
(1.38-1.75)
For ICU admission, there was no significant associations with the statin[40]
487 (8.7%)799 (5.8%)
McCarthy et al.107140Patients hospitalized with confirmed SARS-CoV-2 infectionThree Partners Healthcare hospitals (Massachusetts General Hospital, Brigham and Women’s Hospital, and Newton-Wellesley Hospital)Retrospective cohort studyAdmitted to ICU or died
OR: 1.18 (0.71-1.96)
N/A[41]
5161
Mitacchione et al.179663Patients hospitalized for COVID-19Hospitals include Luigi Sacco Hospital, Milan; Policlinico Umberto I Hospital, Rome; Spedali Civili Hospital, Brescia; Humanitas Gavazzeni Hospital; Bergamo, ItaliaObservational multicenter studyOur results did not confirm the supposed favorable effects of statin therapy on COVID-19 intensive care unit admission[42]
6 (3%)40 (6%)
Ahlström et al.N/AN/AICU COVID-19 patientsSwedenRetrospective cohort study (0.81-1.12)
We did not find a protective effect on ICU admission in statin-treated patients[43]
5181466
Izzi-Engbeaya et al.N/AN/APatients hospitalized with swab-positive COVID-19ICHNT, which includes three hospitals admitting patients with COVID-19 (Charing Cross Hospital, Hammersmith Hospital, and St. Mary’s Hospital), LondonRetrospective cohort studyPrimary outcome of death/ICU admission
Estimate: −0.105
SE: 0.504

(1.12-1.98)
N/A[44]
N/AN/A
Tracheal intubation
AuthorStatinSampleSettingStudy designResultConclusion
UserNonuser
Zhang et al.121912762Patients with COVID-19Hubei Province, ChinaRetrospectiveaHR: 0.37, CI: 0.26-0.53, Cox model analysis showed statin use associated with a lower prevalence of using mechanical ventilation[25]
N/AN/A
Song et al.123126Patients with COVID-19“Lifespan” healthcare system hospitalsRetrospective cohortStatin use significantly associated with decreased risk for IMV OR: 0.45, CI: 0.20-0.99, Data support continued use of statins in patients hospitalized with COVID-19 due to decreased risk for IMV[31]
N/AN/A
Gupta et al.648648Positive for SARS-CoV-2Columbia University Irving Medical Center (CUIMC) and Allen Hospital sites of the New York-Presbyterian Hospital (NYPH)RetrospectiveNo significant difference in invasive mechanical ventilationN/A[45]
130 (20.1%)158 (24.4%)
Masana et al.5811576Patients admitted to hospitals due to SARS-CoV-2 infectionMembers of the Lipids and Arteriosclerosis Units Net (XULA) of Catalonia (Spain)Retrospective observationalN/AN/A[30]
84 (14.46)191 (12.12)
Cariou et al.11921257Patients with diabetes admitted with COVID-1968 French hospitalsNationwide observationalOR: 1.13, CI: 0.83-1.53Routine statin use not significantly associated with increased risk of tracheal intubation/mechanical ventilation[46]
19.2%19.7%
Tan et al.40509Patients admitted for COVID-19Tertiary center in Singapore for COVID-19 infectionRetrospective cohortATET Coeff: −0.08, CI: −0.19-0.02, No significant differences in intubation[36]
1N/A
Peymani et al.7575Hospitalized COVID-19 patientsSingle tertiary hospital in Shiraz, IranRetrospectiveOR: 0.96, CI: 0.61-2.99, Nonsignificant association between statin use and reduction in mortality in COVID-19 patients[47]
N/AN/A
Fan et al.2501897Patients with COVID-19Zhongnan Hospital of Wuhan University and Leishenshan Hospital in Wuhan, ChinaRetrospective studyN/AN/A[39]
26 (10.4%)180 (9.4%)
Mitacchione et al.179663Patients hospitalized for COVID-19Hospitals include Luigi Sacco Hospital, Milan; Policlinico Umberto I Hospital, Rome; Spedali Civili Hospital, Brescia; Humanitas Gavazzeni Hospital; Bergamo, ItaliaObservational multicenter studyOur results did not confirm the supposed favorable effects of statin therapy on COVID-19 mechanical ventilation[42]
6 (3%)36 (5%)
Nicholson et al.511531Adult patients with laboratory-confirmed COVID-19 infectionFive hospitals in the Mass General Brigham healthcare system (Massachusetts General Hospital (MGH), Brigham and Women’s Hospital (BWH), Newton Wellesley Hospital (NWH), Brigham and Women’s Faulkner Hospital (BWFH), and North Shore Medical Center, NSMC) in Boston, USARetrospective cohort (0.65–1.09), N/A[48]
180224
Mortality
AuthorStatinSampleSettingStudy designResultConclusionStatin time
UserNonuser
Gupta et al.648648Positive for SARS-CoV-2Columbia University Irving Medical Center (CUIMC) and Allen Hospital sites of the New York-Presbyterian Hospital (NYPH)RetrospectiveUnivariate OR: 0.69, CI: 0.56-0.85. Multivariate adjusted OR: 0.49, CI: 0.38-0.63Antecedent statin use associated with significantly lower rates of in-hospital mortality within 30 days[45]
112 (17.2%)201 (31.0%)
Masana et al.581581Patients admitted to hospitals due to SARS-CoV-2 infectionMembers of the Lipids and Arteriosclerosis Units Net (XULA) of Catalonia (Spain)Retrospective observationalSignificant difference in mortality rate between groups
HR: 0.58, CI: 0.39-0.89,
A lower SARS-CoV-2 infection-related mortality observed in patients treated with statin therapy prior to hospitalization[30]
115 (19.79)148 (25.40)
Zhang et al.121912762Patients with COVID-19Hubei Province, ChinaRetrospectiveIndividuals with statin therapy had a lower crude 28-day mortality (incidence rate ratios (IRR): 0.78, CI: 0.61–1.00, )Statin use in hospitalized COVID-19 patients associated with lower risk of all-cause mortality and favorable recovery profile[25]
0.21%0.27%
Rossi et al.4229Patients with preexisting chronic cardiovascular disease, with COVID-19N/AObservationalMortality rates of patients taking statins were 21.4% (9/42) and 34.5% (10/29) in those not taking statins ()Statin use significantly reduced risk of mortality in COVID-19 patients[19]
9 (21.4%)10 (34.5%)
Cariou et al.11921257Patients with diabetes admitted with COVID-1968 French hospitalsNationwide observationalMortality rates significantly higher in statin users in 28 days (23.9% vs. 18.2%, ). OR: 1.46, CI: 1.08-1.95Routine statin treatment significantly associated with increased mortality in T2DM patients hospitalized for COVID-19[46]
23.9%18.2%
Saeed et al.9831283Patients with diabetes mellitus hospitalized with COVID-19Montefiore Medical Center, Bronx, New YorkObservational retrospectivePatient with diabetes on statins had lower cumulative in-hospital mortality (24% vs. 39%, ). HR: 0.51, CI: 0.43-0.61, Statin use associated with reduced in-hospital mortality from COVID-19 in patients with diabetes[21]
24%39%
Saeed et al.3721614Patients without diabetes mellitus hospitalized with COVID-19Montefiore Medical Center in Bronx, New YorkObservational retrospectiveNo difference noted in patients without diabetes (20% vs. 21%, )Statin use associated with reduced in-hospital mortality from COVID-19 inpatients with diabetes[21]
20%21%
Song et al.123126Patients with COVID-19“Lifespan” healthcare system hospitalsRetrospective cohortNo significant associations between statin use and in-hospital death
OR: 0.88, CI: 0.37-2.08,
No significant associations between statin use and hospital death[31]
N/AN/A
De Spiegeleer et al.31123Residents at two elderly care homes with COVID-19 diagnosisOne of two Belgian nursing homesRetrospective multicenter cohortConsidering death as serious outcome, the effect sizes, OR: 0.61, CI: 0.15-1.71, Statins not statistically significantly associated with death from COVID-19 in elderly adults in nursing homes[33]
N/AN/A
Rodriguez-Nava et al.4740Laboratory-confirmed COVID-19Community hospital intensive care unit (ICU) located in Evanston, ILRetrospective cohortMultivariable Cox PH regression model showed atorvastatin nonusers had 73% chance of faster progression to death compared with users. HR: 0.38, CI: 0.18-0.77, Slower progression to death associated with atorvastatin use in patients with COVID-19 admitted to ICU[26]
23 (49%)25 (63%)
Zenga et al.38993COVID-19 inpatientsTongji Hospital, Tongji Medical College of HUST (Wuhan, China)Retrospective cohort, -2.05N/A[49]
5160
Nguyen et al.90266African American population with COVID-19University of Chicago Medical Center (UCMC), serving south metropolitan ChicagoRetrospective observational, -1.72N/A[50]
1035
Wang et al.2412Multiple myeloma patients with COVID-19Mount Sinai HospitalRetrospective cohortStatin use significantly associated with mortality. OR: 6.21, CI: 1.37-39.77, N/A[49]
113
Grasselli et al.N/AN/APatients admitted to ICUs in Lombardy with suspected SARS-CoV-2 infectionOne of the network ICUs, MilanRetrospective, observational studyStatins associated with higher mortality in univariate analysis. HR: 0.98, CI: 0.81-1.2, Long-term treatment with statins, before ICU admission associated with higher mortality unadjusted analysis only. Multivariate analysis did not confirm association between any home therapies and increased mortality[51]
N/AN/A
Ayed et al.1093Intensive care unit- (ICU-) admitted COVID-19 patientsJaber Al-Ahmad Al Sabah Hospital, KuwaitRetrospective cohortOR: 0.49, CI: 0.11-2.08N/A[52]
443
Tan et al.40509717 patients admittedTertiary center in Singapore for COVID-19 infectionRetrospective cohortATET Coeff: −0.04, CI: −0.16-0.08, No significant differences in mortality[36]
2
Peymani et al.7575Hospitalized COVID-19 patientsSingle tertiary hospital, Shiraz, IranRetrospectiveHR: 0.76, CI: 0.16-3.72, Nonsignificant association between statin use and reduction in mortality in patients with COVID-19[47]
N/AN/A
Nicholson et al.5115311042 people with COVID-19 symptoms admittedMass General Brigham HospitalsRetrospective cohortOR: 0.50, CI: 0.27-0.93, Chronic statin use associated with reduced in-hospital mortality[53]
N/AN/A
Lala et al.9841752Hospitalized COVID-19-positive patients1 of 5 Mount Sinai Health System hospitals in New York CityMultihospital retrospective cohortHR: 0.57, CI: 0.47-0.69, Statin use associated with improved survival[54]
N/AN/A
Krishnan et al.8171Consecutive patients requiring mechanical ventilation from March 10 to April 15St. Joseph Mercy Oakland HospitalRetrospective observationalOR: 2.44, CI: 1.23-4.76, Statin use associated with increased mortality[55]
N/AN/A
Vahedian-Azimi et al.326525Positive for SARS-CoV-2Baqiyatallah University of Medical SciencesProspective observationalOR: 0.18, CI: 0.06–0.49
Statin use associated with decreased mortality[10]
8282
Butt et al.8433999Danish citizens had a primary or secondary diagnosis code for COVID-19 infectionA Danish hospital, including inpatient, outpatient, and emergency department visitsObservational cohort studyHR 2.87 (95% CI 2.39 to 3.46)Statin exposure was associated with a significantly higher risk of mortality compared with no statin exposure[38]
177 (21.0%)311 (7.8%)
Fan et al.2501897Patients with COVID-19Zhongnan Hospital of Wuhan University and Leishenshan Hospital in Wuhan, ChinaRetrospective studyAdjusted HR, 0.428; 95% CI, 0.169–0.907; Statin use was associated with lower mortality[39]
6 (2.4%)70 (3.7%)
Israel et al.N/AN/AHospitalized COVID-19 patients were assigned to two distinct case-control cohorts. Control patients were taken from the general populationClalit Health Services (CHS) data warehouseRetrospective cohort (0.444, 1.037), 0.072Rosuvastatin has protective effects in this large population analysis[56]
N/AN/A
Israel et al.N/AN/AHospitalized COVID-19 patients were assigned to two distinct case-control cohorts. Case patients were nonhospitalized SARS-CoV-2-positive patientsClalit Health Services (CHS) data warehouseCase-control matched cohortOR (95% CI) 0.530 (0.360, 0.766)
Rosuvastatin has protective effects in this large population analysis[56]
N/AN/A
Mughal et al.—abstract4476Adult patients who were hospitalized with RT-PCR-confirmed SARS-CoV-2 infectionN/ARetrospective cohortN/AN/A[57]
14 (31.8%)7 (9.2%)
Mallow et al.531316363COVID-19 patientDatabase of inpatient and hospital-based outpatient detailed claims across more than 300 acute care hospitals in the USRetrospective cohortOR 0.54, 95% CI, 0.49–0.60; Our findings suggest that patients administered statins in the hospital had a 46% lower risk of death than those not receiving statins[28]
N/AN/A
McCarthy et al.107140Patients hospitalized with confirmed SARS-CoV-2 infectionThree Partners Healthcare hospitals (Massachusetts General Hospital, Brigham and Women’s Hospital, and Newton-Wellesley Hospital)Retrospective cohort studyAdmitted to ICU or died
OR: 1.18 (0.71-1.96)
N/A[41]
5161
Alamdari et al.117342COVID-19 patientsPatients who were admitted to Shahid Modarres Hospital, which is a 279-bed tertiary referral center in Tehran, IranRetrospective cohortOR: 0.27 (0.11–0.64)Statin use history decreased the incidence of mortality dramatically[58]
6 (9.5%)57 (16.7%)
Soleimani et al.66188Patients with COVID-19Sina Hospital in Tehran, IranRetrospective observational studyOR: 0.93 (0.49–1.76)N/A[59]
17 (25%)51 (27%)
Ayeh et al.5943853Patients with a diagnosis of SARS-CoV-2 infectionJohns Hopkins Hospital and affiliated hospitals, Johns Hopkins Bayview Medical Center, Howard County General Hospital, Sibley Memorial Hospital, and Suburban Hospital, USARetrospective study, 95% CI (0.53–1.59)The average treatment effect of statin use on COVID-19-related mortality in the matched groups was not statistically significant[60]
N/AN/A
Ahlström et al.N/AN/AICU COVID-19 patientsSwedenRetrospective cohort study (0.53-0.98)
Statins were protective of ICU death[43]
110N/A
An et al.10749160Patients diagnosed with COVID-19South KoreaNationwide cohortOR: 4.11 (3.07-5.51)N/A[61]
69 (6.4%)159 (1.7%)
Holman et al.118995142710COVID-19 people with type 1 diabetesThe National Diabetes Audit (NDA), UKPopulation-based cohort study (0.65-1.03)
Association of prescription of statins with mortality in type 1 diabetes was not significant[62]
338120
Holman et al.2099505752245COVID-19 people with type 2 diabetesThe National Diabetes Audit (NDA), UKPopulation-based cohort study (0.62-0.75)
In people with type 2 diabetes, prescription for statins was associated with reduced mortality[62]
73553086
Inciardi et al.2574Patients hospitalized for COVID-19 pneumoniaCivil Hospitals of Brescia, Lombardy, ItalyRetrospective cohort (0.71-5.03)N/A[63]
9 (36%)17 (23%)
Luo et al.55228Patients with confirmed COVID-19Tongji Hospital in Wuhan, ChinaRetrospective study (0.65–13.76)
N/A[27]
N/AN/A
Ullah et al.108104Confirmed COVID-19 patientsPrimary, secondary, and tertiary electronic healthcare records (EHRs) of HPB patients in East LondonRetrospective single-center cohort study (1.25-4.56)N/A[64]
3618
Ramachandran et al.114181Patients admitted with a principal diagnosis of COVID-19Tertiary care academic medical center in Brooklyn, New YorkRetrospective cohort study (0.84-3.02)
N/A[65]
N/AN/A
Izzi-Engbeaya et al.N/AN/APatients hospitalized with swab-positive COVID-19ICHNT, which includes three hospitals admitting patients with COVID-19 (Charing Cross Hospital, Hammersmith Hospital, and St. Mary’s Hospital), LondonRetrospective cohort studyPrimary outcome of death/ICU admission
Estimate: −0.105
SE: 0.504

(1.12-1.98)
N/A[44]
N/AN/A
Bifulco et al.117424COVID-19 patientsPatients admitted to Humanitas Clinical and Research Hospital (Rozzano, Milan, Italy)Retrospective cohortAdjusted odds ratio (aOR): 0.75; 95% confidence interval (CI): 0.26–2.17; Deaths were lower, although not significantly, in statin users with respect to nonstatin users[66]
N/AN/A
Oh et al.N/AN/APatients with COVID-19NHIS-COVID-19 cohort database, South KoreanRetrospective cohort studyOR (95% CI) 0.74, (0.52, 1.05), We found that it did not affect the hospital mortality of patients who were diagnosed with COVID-19[29]
N/AN/A
Maric et al.22974594COVID-19 patientsCerner’s large COVID-19 EHR database, USARetrospective cohort studyWe observed a small, but statistically significant, decrease in mortality among patients prescribed statins (16.1%) when compared with matched COVID-19-positive controls (18.0 to 20.6%)[67]
369 (16.1%)845 (18.39%)
Mitacchione et al.179663Patients hospitalized for COVID-19Hospitals include Luigi Sacco Hospital, Milan; Policlinico Umberto I Hospital, Rome; Spedali Civili Hospital, Brescia; and Humanitas Gavazzeni Hospital, Bergamo, ItaliaObservational multicenter studyStatin users appeared to show higher mortality rates[42]
52 (%29)130 (%20)

N/A: not available.