Control HMD    
Quantitative variables Average Sd Average Sd Z P
Age   58.16 4.61 56.31 5.42 3.40 0.001*
Waist circumference 95.06 11.13 89.47 10.83 5.04 <0.001*
Number of Pregnancies 3.63 2.56 2.46 1.83 4.62 <0.001*
Number of births   2.84 1.98 1.99 1.54 4.37 <0.001*
Number of Abortions   0.79 1.20 0.48 0.87 2.93 0.003*
Menopause   46.83 6.26 46.45 6.33 0.49 0.621
Age at first birth   21.88 5.16 24.04 6.04 3.61 <0.001*
Menarche   12.87 1.78 13.17 1.78 1.66 0.096
Time after menopause   11.33 6.42 9.85 7.38 2.69 0.007*
Qualitative variables n % n % x2 P
BMI Normal / overweight 81 52.3 195 63.3 5.23 0.022*
  Obese 74 47.7 113 36.7    
Smoking No 140 90.3 264 85.7 1.97 0.161
  Yes 15 9.7 44 14.3    
Alcohol intake No 137 88.4 258 83.8 1.76 0.185
  Yes 18 11.6 50 16.2    
Metabolic Syndrome No 104 67.1 220 71.4 0.92 0.337
  Yes 51 32.9 88 28.6    
Quantitative variables*: statistically significant difference (p<0.05) Nonparametric Mann-Whitney test *Qualitative variables: statistically significant difference (p<0.05) Chi-square test
Table 1: Comparison between the two groups of Mammographic Density: High Mammographic Density (HMD) and Control in quantitative and qualitative variables.