Table 3 Univariate and multivariate proportional hazard analyses of PSA relapse (n = 908)

Serum PSA (ng/mL) (≥7.8 vs. <7.8)

1.7

1.2–2.3

0.001

1.6

1.2–2.2

0.005

Gleason score (≥ 8vs. ≤7)

2.0

1.4–2.9

0.007

-

-

-

Extra prostatic extension (1 vs. 0)

2.4

1.7–3.3

<0.0001

-

-

-

Lymphovascular invasion (1 vs. 0)

1.6

1.1–2.2

0.009

1.4

0.9–2.0

0.06

Perineural invasion (1 vs. 0)

2.0

1.4–2.8

<0.0001

1.8

1.3–2.7

0.001

Resection margin (1 vs. 0)

3.0

2.2–4.1

<0.0001

-

-

-

Lymph node metastasis (1 vs.0)

3.5

1.1–8.2

0.004

-

-

-

RARP vs RRP

0.7

0.4–0.9

0.04

0.6

0.4–0.9

0.009