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Table 2 Clinical characteristics of patients at the time of diagnosis and of controls. Controls are matched with patients for age.

From: Breast cancer in kurdish women of northern Iraq: incidence, clinical stage, and case control analysis of parity and family risk

  Breast cancer n = 296 Controls n = 254 P
Age 47.4 ± 10.9 46.9 ± 12.7 0.65
Pre-menopausal 59.5% 55.9% 0.75
BMI 27.7 ± 5.0 27.1 ± 4.3 0.16
   ≥50 years old 39.5% 41.3% 0.84
Married 84.1% 91.7% 0.53
   Never married ≥50 y 6.8% 5.7% 0.96
Nulligravida 13.9% 10.6% 0.38
   Nulligravida ≥50 y 9.4% 2.8% 0.11
Children 5.0 ± 3.3 5.4 ± 3.5 0.16
   Children, patients ≥50 y 6.1 ± 3.3 7.6 ± 3.3 0.001
History of mother or sister having breast cancer 11.1% 2.1% < 0.001
History of mother or sister having breast cancer
     Patients ≥50 y
14.1% 3.1% 0.02
  1. Values for age, BMI, and number of children are mean ± standard deviation.