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Table 1 Characteristic of breast cancer patients and health control individuals

From: The association of CASC16 variants with breast Cancer risk in a northwest Chinese female population

VariablesCases (n = 681)Controls (n = 680)p
Age, years (mean ± SD)a50.58 ± 9.8450.63 ± 9.710.930
  > 50345 (51%)344 (51%) 
  ≤ 50336 (49%)336 (49%) 
Tumor position
 Left274 (40%)  
 Right288 (42%)  
 Missing119 (18%)  
LN metastasis
 Node-positive323 (47%)  
 Node-negative331 (49%)  
 Missing27 (4%)  
Clinical stage
 III/IV150 (22%)  
 I/II321 (47%)  
 Missing210 (31%)  
Tumor size
  > 2 cm409 (60%)  
  ≤ 2 cm139 (20%)  
 Missing133 (20%)  
PR
 Positive414 (61%)  
 Negative257 (38%)  
 Missing10 (1%)  
ER
 Positive462 (68%)  
 Negative198 (29%)  
 Missing21 (3%)  
C-erb
 Positive405 (59%)  
 Negative114 (17%)  
 Missing162 (24%)  
Menopausal status
 Yes321 (47%)  
 No247 (36%)  
 Missing113 (17%)  
Procreative times
 1227 (33%)  
  > 1260 (38%)  
 Missing194 (29%)  
Age of menarche (years)
  ≤ 14340 (50%)  
  > 14233 (34%)  
 Missing108 (16%)  
BMI, kg/m2 (mean ± SD)a
  ≤ 24333 (49%)240 (35%)0.274
  > 24168 (25%)114 (17%)0.321
 Missing180 (26%)326 (48%) 
  1. a Student’s t-test is used. p < 0.05 indicates statistical significance
  2. PR progesterone receptor, ER estrogen receptor, BMI body mass index, LN lymph node