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Table 1 Characteristics of patients and control individuals

From: Possible association of β2- and β3-adrenergic receptor gene polymorphisms with susceptibility to breast cancer

   Control
Characteristics Patients (n [%]) individuals (n [%])
Age at diagnosis or check up (years)
   30-39 18 (9.0) 14 (7.7)
   40-49 72 (36.3) 39 (21.4)
   50-59 69 (34.3) 71 (39.0)
   60-69 41 (20.4) 58 (31.9)
Age at menarche (years)
   -13 92 (46.0) 89 (48.9)
   14-15 84 (42.0) 65 (35.7)
   16+ 23 (11.5) 28 (15.4)
   No recall 1 (0.5) 0 (0.0)
Menopause
   Premenopausal 108 (54.2) 95 (52.2)
   Postmenopausal 92 (45.8) 87 (47.8)
Body mass index
   <20 46 (23.0) 42 (23.1)
   20-24 108 (54.0) 93 (51.1)
   ≥ 24 46 (23.0) 47 (25.8)
Breast cancer family history, in mother and/or sister(s)
   No 175 (87.6) 178 (97.8)
   Yes 25 (12.4) 4 (2.2)
  1. The total number of cases was 200, and that of control individuals was 182.