showed a trendP =0.098
For MI, the regression of the spline coefficient showed a trend for significance ( P =0.098) and for improvement of goodness of fit ( P =0.12).
For MI, the regression of the spline coefficient showed a trend for significance ( P =0.098) and for improvement of goodness of fit ( P =0.12).
The results here should also be interpreted with caution because some point estimates failed to reach statistical significance, although the small size of the extreme groups limited our power.