Table 1 A two-by-two contingency table for C-PRR calculation.

From: Ontology-based systematical representation and drug class effect analysis of package insert-reported adverse events associated with cardiovascular drugs used in China

 

All drugs in a drug class

All drugs in all other drug groups

an AE

a (No. of drugs)

b (No. of drugs)

Not the AE

c (No. of drugs)

d (No. of drugs)

Total

a + c

b + d

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