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Table 2 Association between breast density (odds of having mixed/dense breasts) and exposure variables from the Copenhagen mammography register and the Copenhagen School Health Records Registry in 13,572 women

From: Birth weight, childhood body mass index, and height in relation to mammographic density and breast cancer: a register-based cohort study

  Model 1 Model 2
  Crude model OR (95% CI) Adjustedamodel OR (95% CI)
Age at screening (years) 0.90 (0.89-0.91) 1.00 (0.98-1.02)b
Born 1930 to 1934 1.00 1.00 c
Born 1935 to 1939 1.34 (1.21-1.48) 1.34 (1.16-1.55)
Born 1940 to 1944 2.16 (1.96-2.39) 2.18 (1.80-2.65)
Born 1945 to 1949 3.89 (3.48-4.34) 3.92 (3.19-4.81)
Birth weight (g) 0.95 (0.87-1.03) 0.98 (0.90-1.07)
BMI at age 7 (kg/m2) 0.72 (0.70-0.75) 0.69 (0.66-0.72)
BMI at age 8 (kg/m2) 0.70 (0.67-0.73) 0.65 (0.62-0.68)
BMI at age 9 (kg/m2) 0.67 (0.64-0.69) 0.62 (0.59-0.64)
BMI at age 10 (kg/m2) 0.64 (0.61-0.67) 0.59 (0.57-0.62)
BMI at age 11 (kg/m2) 0.61 (0.59-0.64) 0.57 (0.55-0.60)
BMI at age 12 (kg/m2) 0.60 (0.58-0.63) 0.56 (0.54-0.59)
BMI at age 13 (kg/m2) 0.59 (0.56-0.61) 0.56 (0.53-0.58)
Height at age 7 (cm) 0.99 (0.96-1.03) 0.99 (0.95-1.03)
Height at age 8 (cm) 0.99 (0.96-1.03) 0.98 (0.95-1.02)
Height at age 9 (cm) 0.99 (0.95-1.02) 0.98 (0.94-1.01)
Height at age 10 (cm) 0.97 (0.94-1.01) 0.96 (0.93-1.00)
Height at age 11 (cm) 0.96 (0.93-1.00) 0.95 (0.92-0.99)
Height at age 12 (cm) 0.96 (0.93-0.99) 0.95 (0.91-0.98)
Height at age 13 (cm) 0.98 (0.95-1.01) 0.96 (0.93-1.00)
  1. OR, odds ratio; CI, confidence interval; BMI, body mass index. aAdjusted for age at screening and birth cohort; badjusted for birth cohort; cadjusted for age at screening.