Table 2 Univariate and multivariate Cox regression models for the variables associated with urethral stricture recurrence

Age > 36 years

0.80 (0.38, 1.67)

0.554

–

Obesity

0.94 (0.66, 1.34)

0.742

–

Breast feeding

0.70 (0.33, 1.48)

0.362

–

Oral contraceptive use

2.86 (1.35, 6.06)

0.006

3.41 (1.57, 7.40)

0.002

Smoking

4.09 (1.55, 10.78)

0.004

3.17 (1.14, 8.82)

0.027

Family history of breast cancer

1.35 (0.51, 3.57)

0.535

–

Hyperechoic mass

8.96 (3.10, 25.87)

< 0.001

3.14 (0.94, 10.49)

0.063

Surgical margin

1.70 (0.80, 3.63)

0.164

–

Size > 4 cm

4.22 (1.86, 9.58)

0.001

3.45 (1.44, 8.27)

0.005

Histologic subtype

benign

0.46 (0.20, 0.46)

0.066

borderline

0.94 (0.22, 4.00)

0.943

malignant

3.07 (1.24, 7.57)

0.015

0.94 (0.38, 3.05)

0.940

Mitotic Rate > 2

3.33 (1.59, 7.00)

0.001

0.82 (0.31, 2.16)

0.696

Heterogeneous stroma

2.11 (1.00, 4.47)

0.050

–

Stromal overgrowth

4.07 (1.88, 8.82)

< 0.001

2.81 (1.20, 6.58)

0.017

Stromal cell atypia

5.15 (1.78, 14.89)

0.002

3.65 (1.16, 11.45)

0.026