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Table 1 Baseline characteristics of patients according to presence of IDC-P

From: Retrospective study on the benefit of adjuvant radiotherapy in men with intraductal carcinoma of prostate

  Patients with IDC-P (n = 73) Patients without IDC-P (n = 220) P *
Adjuvant radiotherapy 21 (29%) 27 (12%) 0.002
Mean age at diagnosis (S.D.) 62.1 (6.8) 62.0 (6.8) 0.852
Grade group
 1 16 (22%) 113 (51%) < 0.001
 2 26 (36%) 82 (37%)
 3 21 (29%) 19 (9%)
 4 2 (3%) 1 (1%)
 5 8 (11%) 5 (2%)
Lymphovascular invasion 19 (26%) 17 (8%) < 0.001
Extraprostatic extension 42 (58%) 66 (30%) < 0.001
Seminal vesicle invasion 15 (21%) 14 (6%) 0.001
Positive margins 29 (40%) 51 (23%) 0.010
Mean # of high-risk features (S.D.) 1.32 (1.1) 0.6 (0.9) < 0.001
Median follow-up (months) (I.Q.R.) 61 (29–101) 112 (70–140) < 0.001
Centre
 1 19 (26%) 20 (9%) < 0.001
 2 54 (74%) 200 (91%)
  1. High-risk features: Grade groups 4–5, seminal vesicle invasion, positive margins, extraprostatic extension
  2. S.D Standard deviation, I.Q.R Interquartile range
  3. *Welch’s test for means, Fisher’s exact test for 2 × 2 tests, Pearson’s chi-square for categorical variables with more than 2 categories, Mann-Whitney U for medians