Table 1 Four-fold table of disproportionality analysis.

From: Risk assessment of the top 50 drugs associated with drug-induced orthostatic hypotension: a disproportionality analysis of the FAERS and JADER databases

Item

Number of target adverse event reports

Number of other adverse event reports

Total

Target drug

a

b

a + b

Other drugs

c

d

c + d

Total

a + c

b + d

N = a + b + c + d

  1. a, number of reports containing both the target drug and target adverse reaction reports; b, number of reports containing other adverse reaction reports of the target drug; c, number of reports containing the target adverse reaction reports of other drugs; d, number of reports containing other drugs and other adverse reaction reports; N, the number of reports.
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