Objective: To quantify the magnitude of the risk of total and type-specific cardiovascular and cerebrovascular diseases (CCVD) in patients with anti-neutrophil cytoplasmic antibody-associated vasculitis (AAV).
Method: Searches of PubMed, Embase, and the Cochrane Library were conducted. Observational studies were included if they reported data on CCVD in AAV patients. Pooled risk ratios (RR) with 95% confidence intervals were calculated.
Result: Fourteen studies met the inclusion criteria, comprising 20,096 AAV patients (over 46,495 person-years) with 5757 CCVD events. Compared with non-vasculitis population, AAV patients showed an 83% increased risk of incident CCVD (1.83 [1.37-2.45]; n = 10), 48% for coronary artery disease (1.48 [1.26-1.75]; n = 9), and 56% for cerebrovascular accident (1.56 [1.22-1.99]; n = 9). For type-specific CCVD, the risks of myocardial infarction, stroke, heart failure were increased by 67% (1.67 [1.29-2.15]; n = 6), 97% (1.97 [1.19-3.25]; n = 8) and 72% (1.72 [1.28-2.32]; n = 4), whereas there was only a trend toward a higher risk of angina pectoris (1.46 [0.90-2.39]; n = 2), and ischemic stroke (1.88 [0.86-4.12]; n = 4). Subgroup analyses by AAV type found significantly increased CCVD risk in both granulomatosis with polyangiitis (1.87 [1.29-2.73]; n = 7) and microscopic polyangiitis (2.93 [1.58-5.43]; n = 3). In three studies reporting impact of follow-up period after AAV diagnosis, the CCVD risk was significantly higher in the first two years after diagnosis than the subsequent follow-up (2.23 [2.00-2.48] vs. 1.48 [1.40-1.56]; p < 0.01). Significant heterogeneity existed in the main analyses.
Conclusion: This meta-analysis demonstrates that AAV is associated with increased risks of overall and type-specific CCVD, especially within two years after AAV diagnosis.
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