However, there
was a modest degree of effect modification by BMI, with the
lower risk associated with low-fat dairy product consumption
being somewhat more pronounced in women with higher BMI
(compared with the first quintile of low-fat dairy foods,
P-interaction = 0.008 between the 4th quintile of low-fat dairy
foods and BMI; P-interaction = 0.046 between the 5th quintile
of low-fat dairy foods and BMI). The effect of this interaction is
subtle and best illustrated by example.