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Table 1 Characteristics of the patients in the study groups

From: Quantification of angiogenesis in estrogen receptor-positive and negative breast carcinoma

Age (years) Group A Group B
Mean 52.40 58.38
SE 2.32 2.26
SD 13.75 12.18
P = 0.070: Student's t-test; P = 0.204: Mann-Whitney's non-parametric test
Tumor size (cm)   
Mean 3.36 3.26
SE 0.21 0.22
SD 1.25 1.19
P = 0.746: Student's t-test; P = 0.833: Mann-Whitney's non-parametric test
Histological grade   
  n (%) n (%)
1 12 (34.29) 8 (27.59)
2 16 (45.71) 11 (37.93)
3 7 (20.00) 10 (34.48)
total 35 (100.00) 29 (100.00)
P = 0.426: Chi-square test   
  1. Group A: ER-positive, n = 35; Group B: ER-negative, n = 29
  2. SD: standard derivation; SE: standard error