Table I.
Total characteristics of case (PCOS) and control groups
| Variables | PCOS (n░=░68) | Control (n░=░68) | P-value |
|---|---|---|---|
| Age (yrs)* | 45.24░±░4.07 | 45.73░±░4.22 | 0.50 |
| BMI (kg/m2) * | 29.42░±░6.67 | 27.58░±░4.41 | 0.06 |
| WHR* | 0.88░±░0.09 | 0.83░±░0.07 | 0.001 |
| Parity (n)* | 2.42░±░1.09 | 2.28░±░1.02 | 0.48 |
| Age at first pregnancy (yr)* | 23.49░±░6.66 | 21.94░±░5.16 | 0.18 |
| Age of menarche (yr)* | 13.71░±░1.80 | 13.63░±░2.45 | 0.84 |
| The family history of breast surgery** | 17 (25) | 10 (14.7) | 0.20 |
| Exposure to cigarette smoke** | 20 (29.4) | 10 (14.7) | 0.06 |
| Physical activity** | 53 (77.9) | 29 (42.6) | < 0.001 |
| History of breastfeeding** | 52 (76.5) | 54 (79.4) | 0.84 |
| Daily sun exposure more than 30░min** | 4 (5.9) | 15 (22.1) | 0.01 |
| History of abortion** | 22 (32.4) | 16 (23.5) | 0.34 |
| Vitamin D intake** | 24 (35.3) | 18 (26.5) | 0.35 |
| Calcium intake** | 64 (94.1) | 51 (75) | 0.004 |
| Hormone therapy** | 37 (54.4) | 4 (5.9) | < 0.001 |
| ACR breast density** 1 2 3 4 |
16 (23.5) 22 (32.4) 21 (30.9) 9 (13.2) |
4 (5.9) 26 (38.2) 30 (44.1) 8 (11.8) |
0.03 |
*
Data expressed as mean░±░SD;
**
Data expressed as number (%)
P-value refers to t-test in comparison of continues variables and Chi-square test was conducted between categorical variables
PCOS: Polycystic ovarian syndrome; BMI: Body mass index; WHR: Waist-hip ratio