[DrSingh]

PAR – proportion of cases in the total population that can be attributed to the risk factor

PAR = p0 – p2 or an alternate formula, PAR = (p1 – p2) x n1/N
Where:
p0 = the proportion of ALL births with the outcome of interest (a + c / a + b + c + d)
p1 = the proportion of births with the outcome of interest to mothers WITH the risk factor
(a / a + b)
p2 = the proportion of births with the outcome of interest to mothers WITHOUT the risk
factor (c / c + d)
N = the total number of births (a + b + c + d)
n1= the number of births exposed to the risk factor (a + b)

PAR% = p0 – p2/p0 x 100

• This topic was modified 3 years, 6 months ago by DrSingh.
• This topic was modified 3 years, 6 months ago by DrSingh.

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