Type 2 & other diabetes

Risk phenotypes of diabetes and association with COVID-19 severity and death: an update of a living systematic review and meta-analysis

DiabetologiaPublished Living systematic review and meta-analysis of observational studies

Authors' conclusion

Individuals with a more severe course of diabetes and pre-existing comorbidities had a poorer prognosis of COVID-19 than individuals with a milder course of the disease.

Study context

Population
Individuals with diabetes and confirmed SARS-CoV-2 infection; searches to 14 February 2022, PubMed alert to 1 December 2022169 articles
Participants
≈900,000 individuals
Comparison
High-risk phenotypes of diabetes vs other phenotypes
Outcome
COVID-19-related death and severity
Methodological detailsfirst update, random-effects meta-analysis, Quality in Prognosis Studies (QUIPS) risk of bias, GRADE certainty of evidence, Observational studies; residual or unmeasured confounding cannot be ruled out
  • First update
  • Random-effects meta-analysis
  • QUIPS risk of bias
  • GRADE certainty of evidence
  • Observational studies; residual or unmeasured confounding cannot be ruled out

Pooled result

As reported in the abstract

COVID-19-related death: new evidence (moderate to high certainty)
Obesity, SRR (95% CI), n=21 studies
1.18 [1.04, 1.34]
HbA1c 53-75 mmol/mol [7-9%], n=8
1.18 [1.06, 1.32]
Chronic GLP-1 RA use, n=9
0.83 [0.71, 0.97]
Pre-existing HF, n=14
1.33 [1.21, 1.47]
Pre-existing liver disease, n=6
1.40 [1.17, 1.67]
Charlson index per 1 unit increase, n=2
1.33 [1.13, 1.57]
C-reactive protein per 5 mg/l increase, n=10
1.07 [1.02, 1.12]
Aspartate aminotransferase per 5 U/l increase, n=5
1.28 [1.06, 1.54]
eGFR per 10 ml/min per 1.73 m² increase, n=6
0.80 [0.71, 0.90]
Lactate dehydrogenase per 10 U/l increase, n=7
1.03 [1.01, 1.04]
Lymphocyte count per 1×109/l increase, n=6
0.59 [0.40, 0.86]

Further pooled results

COVID-19 severity

Existing COVID-19 vaccination, SRR (95% CI), n=3
0.32 [0.26, 0.38]
Pre-existing hypertension, n=49
1.23 [1.14, 1.33]
Similar associations as for death; new evidence on neuropathy, cancer and high IL-6 levels

Original publication

Risk phenotypes of diabetes and association with COVID-19 severity and death: an update of a living systematic review and meta-analysis. Diabetologia. Published 19 May 2023. doi:10.1007/s00125-023-05928-1

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