To provide clinical utility of the prediction model, we also created a live birth prediction chart with rapidly assessable clin-

ical parameters only. Specifically, the estimated chance of live birth was calculated from a modified logistic regression model

for live birth by removing the laboratory variables from the original final model. The estimated chances of live birth were then

categorized by every 10 percentage points until it reached the maximum estimated chance of live birth. The color-coded chart

was then created with the categorized chance of live birth by possible combinationsof the clinical variables. 修正logistic回归啥意思