Table 4 Ultrasound finding and type of tumor

Tumor size

Total

Benign

Malignant

RR (95% CI)

P-value

Greater 10 (>  10)

46

13 (28.3)

2 (4.3)

0.15 (0.04, 0.64)

0.0104

Equal or Less than 10 (<  10)

85

15 (17.6)

5 (5.9)

0.33 (0.13,0.88)

0.0259

Unknown

33

N/A

N/A

N/A

N/A

Tumor characteristic

Total

Benign

Malignant

RR (95% CI)

P-value

Simple/ Null / N/A

97

12 (12.4)

1 (1.03)

0.08 (0.01, 0.63)

0.0159

Complex (solid component)

13

3 (23.1)

10 (76.9)

3.33 (1.18, 9.39)

0.0228

Solid

3

0 (0)

1 (33.3)

3.01 (0.17, 53.7)

0.4554

Multi-cyst/Multi-occulated

25

9 (36.0)

2 (8.0)

0.22 (0.05, 0.93)

0.0390

Dermoid

25

25 (100)

0 (0)

N/A

N/A