nominally significantP = 0.01
We then tested for interaction with habitual starch intake and observed a nominally significant effect of interaction between AMY1 CN and starch intake on two out of 64 genera, Megasphaera ( P = 0.01) and Acidaminococcus ( P = 0.05), and found similar results when this was analyzed with further adjustments for energy intake, smoking habits, and physical activity level.