Intelligent Analysis of Premature Ventricular Contraction Based on Features and Random Forest

Table 6

Impact of unbalanced datasets on experiments.

Proportion	Acc (%)	PPV (%)	Se (%)	Sp (%)	γ (%)
13 : 1	77.34	75.01	80.10	78.21	58.32
8 : 1	84.20	84.38	85.00	86.92	71.93
4 : 1	89.47	90.63	92.50	92.08	84.59
1 : 1	96.38	95.46	97.88	97.56	95.45