Benign (n=144)
Malignant (n=70)
Malignancy rate
Group 1 (n=47)
34
13
0.27
Group 2 (n=67)
45
22
0.32
Group 3 (n=85)
57
28
0.32
Group 4 (n=15)
8
7
0.46
Total
144
70
0.32
Table 2:
Malignancy rates in groups
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