Table 1 Baseline characteristics of the study population

Gender, n (%)

0.471^a

 Male

58 (56.3%)

21 (20.4%)

 Female

20 (19.4%)

4 (3.9%)

Location, n (%)

0.002^a

 Lateral wall

33 (32.0%)

1 (1.0%)

 Posterior wall

28 (27.2%)

18 (17.5%)

 Parietal wall

6 (5.8%)

1 (1.0%)

 Bottom wall

8 (7.8%)

5 (4.9%)

 Anterior wall

3 (2.9%)

0 (0.0%)

Morphology, n (%)

0.035^b

 Cauliflower

25 (24.3%)

11 (10.7%)

 Hilly

15 (14.6%)

1 (1.0%)

 Lobulation

19 (18.4%)

2 (1.9%)

 Papillary

19 (18.4%)

11 (10.7%)

Number of lesion, n (%)

0.089^a

 Single

57 (55.3%)

23 (22.3%)

 Multiple

21 (20.4%)

2 (1.9%)

Calcification, n (%)

0.109^b

 Absence

64 (62.1%)

24 (23.3%)

 Present

14 (13.6%)

1 (1.0%)

Cystic degeneration, n (%)

1.000^b

 Absence

75 (72.8%)

25 (24.3%)

 Present

3 (2.9%)

0 (0.0%)

Junction smoothness, n (%)

0.007^a

 Smooth

27 (26.2%)

17 (16.5%)

 Non-smooth

51 (49.5%)

8 (7.8%)

Age, mean ± SD

63.51 ± 12.23

55.00 ± 11.80

0.003^c

Urine erythrocyte, median (IQR)

323 (6, 2647.75)

3 (0, 15)

< 0.001^d

Maximum transverse diameter, median (IQR)

2.50 (1.80, 3.58)

1.20 (0.70, 1.70)

< 0.001^d

Maximum longitudinal diameter, median (IQR)

1.75 (1.30, 2.40)

1.00 (0.80, 1.60)

< 0.001^d

Transverse diameter/longitudinal diameter, median (IQR)

1.45 (1.20, 1.66)

1.00 (0.64, 1.53)

0.001^d

Tumor-wall interface, median (IQR)

2.05 (1.30, 3.58)

0.70 (0.40, 0.90)

< 0.001^d

Non-enhanced CT value, mean ± SD

30.95 ± 5.08

28.84 ± 5.46

0.079^c

arterial phase CT value, mean ± SD

72.92 ± 14.88

54.49 ± 15.84

< 0.001^c

Arterial reinforcement rate, median (IQR)

1.28 (1.07, 1.52)

0.84 (0.52, 1.19)

< 0.001^d