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Table 1 Baseline characteristics

From: Prognostic value of estrogen receptor-α and progesterone receptor in curatively resected colorectal cancer: a retrospective analysis with independent validations

  Training set Internal validation set External validation set
Number of patients 148 485 511
Patient demographics
 Median age (min-max) 58 (16–89) 59 (16–86) 68 (31–90)
 Male (number, %) 91 (61.5%) 290 (59.8%) 270 (52.8%)
Localization
 Colon 77 (52.0%) 221(45.6%) 379 (74.2%)
 Rectum 71 (48.0%) 264 (54.4%) 132 (25.8%)
Stage
 Stage I 22 (14.9%) 99 (20.4%) 106 (20.7%)
 Stage II 64 (43.2%) 178 (36.7%) 224 (43.8%)
 Stage III 62 (41.9%) 208 (42.9%) 181 (35.4%)
ER-α expression
 High (number, %) 19 (12.8%) 78 (16.1%) 158 (30.9%)
 Low (number, %) 129 (87.2%) 407 (83.9%) 353 (69.1%)
PR expression
 High (number, %) 32 (21.6%)   
 Low (number, %) 116 (78.4%)   
  1. Baseline characteristics of the two cohorts regarding demography (age and gender), tumor features (stage and localization), ER-α expression and PR expression (just in training set)
  2. Abbreviations: ER-α estrogen receptor –α, PR progesterone receptor
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