| PMC full text: | Published online 2014 Mar 28. doi: 10.1186/1471-2407-14-229
|
Table 3
Potential determinants for breast density and tumour detection
| Factor | Category | Breast density | | ||
|---|---|---|---|---|---|
| | | Fatty (n =93) | Moderate (n=312) | Dense (n=214) | |
| Number (column percent) Mean, SD in italics | p-value** | ||||
| Age at baseline | Years | 60.1 (7.1) | 56.8 (6.8) | 55.1 (6.7) | <0.0001 |
| Age at diagnosis | Years | 67.4 (7.3) | 65.2 (7.1) | 62.0 (7.6) | < 0.0001 |
| HRT at diagnosis | No | 25 (26.9) | 126 (40.4) | 46 (21.5) | <0.0001 |
| | Yes | 10 (10.8) | 84 (26.9) | 106 (49.5) | |
| | Unknown | 58 (62.4) | 102 (32.6) | 62 (29.0) | |
| Menopausal status at diagnosis | Premenopausal | 3 (3.2) | 18 (5.8) | 32 (15.0) | 0.001 |
| | Postmenopausal | 89 (95.7) | 287 (92.0) | 177 (82.7) | |
| | Unknown | 1 (1.1) | 7 (2.2) | 5 (2.3) | |
| BMI at baseline | <20 | 0 (0.0) | 10 (3.2) | 17 (7.9) | <0.0001 |
| | 20-<25 | 29 (31.2) | 135 (43.3) | 129 (60.3) | |
| | 25-<30 | 27 (29.0) | 123 (39.4) | 53 (24.8) | |
| | ≥30 | 37 (39.8) | 44 (14.1) | 15 (7.0) | |
| Detection mode (three categories) | Non-symptomatic | 50 (53.8) | 183 (58.7) | 117 (54.7) | 0.333 |
| | Interval | 10 (10.8) | 43 (13.8) | 34 (15.9) | |
| | Symptomatic | 31 (33.3) | 83 (26.6) | 63 (29.4) | |
| | Unknown* | 2 (2.2) | 3 (1.0) | 0 (0.0) | |
| Detection mode (symptomatic including interval cancers) | Non-symptomatic | 50 (53.8) | 183 (58.7) | 117 (54.7) | 0.559 |
| Symptomatic | 43 (46.2) | 129 (41.3) | 97 (45.3) | ||
*Unknown if interval or symptomatic cancer.
**Continuous variables analysed with ANOVA and categorical variables with the Chi-2 test.