|
Method
|
MSE
|
R
2
|
N
|
|---|
|
Univariate selection
|
117.0 (8.6)
|
0.67 (0.02)
|
132.5 (9.7)
|
|
Lasso
|
111.9 (8.4)
|
0.69 (0.02)
|
108.8 (12.9)
|
|
Boosting
|
113.0 (8.6)
|
0.68 (0.02)
|
126.1 (8.8)
|
|
Random forest
|
120.2 (9.7)
|
0.66 (0.03)
|
–a
|
- Summary statistics (mean and standard deviation) of mean squared error (MSE) and R
2 obtained from (linear) regression models with selected features, as well as the number of selected features N, are shown. All measurements were obtained by 3-fold cross-validation with 100 repetitions
-
MSE mean squared error, PMD percentage mammographic density
-
aThere was no variable selection with random forest
