RT Journal
A1 Forman JP
T1 POpulation attributable risk of incident hypertension in women—reply
JF JAMA
JO JAMA
YR 2009
FD December 16
VO 302
IS 23
SP 2550
OP 2551
DO 10.1001/jama.2009.1827
UL http://dx.doi.org/10.1001/jama.2009.1827
AB 
where Pe represents the proportion of the population exposed to the risk factor.1 This alternative formula was used to recalculate all of the PARs that were reported in the article. The interpretation of the data are virtually identical using this formula compared with using the formula in the article. An example is the comparative data of the principal results, which were presented in Table 2 of the article. The PARs in the article vs using the alternative formula were 53% vs 52% (3 healthy lifestyle factors), 58% vs 57% (4 factors), 72% vs 71% (5 factors), and 78% vs 78% (6 factors).