Table 1.
Characteristics of the study population.
| Characteristics | All (n = 162) | Premenopausal (n = 82) | Postmenopausal (n = 80) | p-Value |
|---|---|---|---|---|
| Age at mastectomy (years) | 52 ± 7.9 | 47 ± 5.8 | 58 ± 4.9 | <0.0001 |
| Degree of lobular involution (n) | ||||
| No or partial involution | 77 (48%) | 51 (62%) | 26 (32%) | 0.00012 |
| Complete involution | 85 (52%) | 31 (38%) | 54 (68%) | |
| Predominant lobule type (n) | ||||
| Predominant type 1 without any type 3 | 65 (40%) | 16 (20%) | 49 (61%) | <0.0001 |
| Predominant type 2–3 | 97 (60%) | 66 (80%) | 31 (39%) | |
| Microcalcifications (n) | 67 (41%) | 29 (35%) | 38 (48%) | 0.12 |
| Waist circumference (cm) | 87 ± 13 | 84 ± 12 | 90 ± 13 | 0.0018 |
| Parity | ||||
| Nulliparous | 44 (27%) | 23 (28%) | 21 (26%) | 0.80 |
| Parous | 118 (73%) | 59 (72%) | 59 (74%) | |
| Number of deliveries * (mean) | 2.1 ± 0.80 | 2.1 ± 0.81 | 2.0 ± 0.80 | 0.36 |
| Age at the first delivery * (years) | 26 ± 4.1 | 26 ± 4.3 | 26 ± 3.8 | 0.44 |
| Breastfeeding * (n) | 61 (52%) | 33 (56%) | 28 (47%) | 0.49 |
| Total breastfeeding duration * (months) | 4.6 ± 7 | 5.5 ± 8.3 | 3.6 ± 5.3 | 0.13 |
* In parous women; continuous numbers are presented as mean ± standard deviation (SD), p-value < 0.05 is considered significant.