Table 1.
Characteristics of the study population (N = 193).
| Patients | Case subjects, N = 93 |
Control subjects, N = 100 |
|---|---|---|
| Breast cancer | n(%, 95% CI) | n(%, 95% CI) |
| Age (years) | ||
| 30–39 | 11 (11.83, 21.50–22.85) | 9 (9.00, 0.00–19.36) |
| 40–49 | 34 (36.56, 26.88–47.58) | 37 (37.00, 27.00–47.36) |
| 50–59 | 26 (27.96, 18.28–38.98) | 36 (36.00, 26.00–46.36) |
| 60–69 | 15 (16.13, 64.52–27.15) | 17 (17.00, 7.00–27.36) |
| 70+ | 7 (7.53, 0.00–18.55) | 1 (1.00, 0.00–1.36) |
| Histologic type | ||
| Ductal carcinoma | 80 (86.02, 80.65–93.30) | 84 (84.00, 78.00–91.42) |
| Lobular carcinoma | 10 (10.75, 4.30–17.32) | 16 (16.00, 10.00–23.42) |
| Combined ductal/ lobular carcinoma |
2 (2.15, 0.00–8.72) | |
| Metaplastic carcinoma | 1 (1.08, 0.00–7.64) | |
| Year at diagnosis | n(%) | n(%) |
| 1998–2000 | 4 (4.30) | 19 (19.00) |
| 2001–2003 | 10 (10.75) | 22 (22.00) |
| 2004–2006 | 17 (18.28) | 21 (21.00) |
| 2007–2009 | 31 (33.33) | 17 (17.00) |
| 2010–2012 | 31 (33.33) | 21 (21.00) |
| CIN3+ | n(%, 95% CI) | |
| Age (years) | ||
| <30 | 4 (4.30, 0.00–15.52) | |
| 30–39 | 27 (29.03, 19.35–40.25) | |
| 40–49 | 24 (25.80, 16.13–37.02) | |
| 50–59 | 25 (26.88, 17.20–38.10) | |
| 60+ | 13 (13.98, 4.30–25.19) | |
| Histologic type | ||
| CIN3 | 34 (0.37, 0.27–0.48) | |
| Squamous cell carcinoma in situ |
31 (0.33, 0.24–0.45) | |
| Adenocarcinoma in situ | 3 (0.03, 0.00–0.15) | |
| Squamous cell carcinoma | 20 (0.22, 0.12–0.33) | |
| Adenocarcinoma | 5 (0.05, 0.00–0.17) | |
| Year at diagnosis | n(%) | |
| 1998–2000 | 28 (30.11) | |
| 2001–2003 | 30 (32.26) | |
| 2004–2006 | 18 (19.35) | |
| 2007–2009 | 12 (12.90) | |
| 2010–2012 | 5 (5.38) | |