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Table 5 Standard errors in parentheses ** N<0.01, ** p<0.05, * p<0.1 Table 5 presents the correlation matrix. C: Audit cost, KAMs: Key Audit matters, GC: Going concern, BIG4: audit typ. CFO: cash flow from operation, FS: firm size measured by logarithm of total assets, ROE, Beta, , BS: board size, INL board independence, NAF: non-audit fees. Table 5: Pairwise correlation