Table 4.
Adjusted odds ratios (ORs) and 95% confidence intervals (95% CI) for the association between other breast cancer screening examinations and familial risk for female relatives from the Ontario Site of the Breast Cancer Family Registry
| Familial Risk [n (%)] | |||
|---|---|---|---|
| Screening Examinations | Low (N = 521) |
Moderate or High (N = 518) |
ORa (95% CI) |
| Time since last Clinical Breast Examb | |||
| All women | |||
| Never had or Non-screening CBE | 57 (11.3) | 42 (8.4) | 1.00 |
| Screening CBE, ≤ 12 months ago | 264 (52.2) | 312 (62.3) | 1.40 (0.90-2.16) |
| Screening CBE, > 12 – 24 months ago | 115 (22.7) | 87 (17.4) | 0.95 (0.57-1.57) |
| Screening CBE, > 24 months ago | 70 (13.8) | 60 (12.0) | 1.11 (0.64-1.92) |
| Women < 50 years | |||
| Never had or Non-screening CBE | 48 (15.1) | 22 (10.6) | 1.00 |
| Screening CBE, ≤ 12 months ago | 153 (48.3) | 121 (58.5) | 1.84 (1.02-3.31)c |
| Screening CBE, > 12 – 24 months ago | 69 (21.8) | 40 (19.3) | 1.37 (0.69-2.72) |
| Screening CBE, > 24 months ago | 47 (14.8) | 24 (11.6) | 1.18 (0.53-2.62) |
| Women ≥ 50 years | |||
| Never had or Non-screening CBE | 9 (4.8) | 20 (6.8) | 1.00 |
| Screening CBE, ≤ 12 months ago | 111 (58.7) | 191 (65.0) | 0.87 (0.38-2.02) |
| Screening CBE, > 12 – 24 months ago | 46 (24.3) | 47 (16.0) | 0.53 (0.22-1.32) |
| Screening CBE, > 24 months ago | 23 (12.2) | 36 (12.2) | 0.83 (0.31-2.21) |
| Frequency of Breast Self-Examinationb | |||
| All women | |||
| Once a year or less | 88 (17.1) | 68 (13.4) | 1.00 |
| Every 2-6 months | 228 (44.2) | 227 (44.6) | 1.22 (0.81-1.85) |
| Once a month or more | 200 (38.8) | 214 (42.0) | 1.19 (0.78-1.83) |
| Women < 50 years | |||
| Once a year or less | 58 (17.8) | 31 (14.5) | 1.00 |
| Every 2-6 months | 149 (45.7) | 99 (46.3) | 1.12 (0.64-1.97) |
| Once a month or more | 119 (36.5) | 84 (39.3) | 1.07 (0.60-1.93) |
| Women ≥ 50 years | |||
| Once a year or less | 30 (15.8) | 37 (12.5) | 1.00 |
| Every 2-6 months | 79 (41.6) | 128 (43.4) | 1.31 (0.71-2.39) |
| Once a month or more | 81 (42.6) | 130 (44.1) | 1.26 (0.68-2.33) |
| Ever had a Breast Ultrasound b | |||
| All Women | |||
| No or Non-Screening breast ultrasound | 478 (92.6) | 451 (88.4) | 1.00 |
| Screening breast ultrasound | 38 (7.4) | 59 (11.6) | 1.76 (1.09-2.84)c |
| Women < 50 years | |||
| No or Non-Screening breast ultrasound | 304 (93.0) | 187 (86.6) | 1.00 |
| Screening breast ultrasound | 23 (7.0) | 29 (13.4) | 1.89 (1.03-3.48)c |
| Women ≥ 50 years | |||
| No or Non-Screening breast ultrasound | 174 (92.1) | 264 (89.8) | 1.00 |
| Screening breast ultrasound | 15 (7.9) | 30 (10.2) | 1.33 (0.66-2.70) |
a
Odds ratio compare women at moderate or high familial risk to women at low familial risk. Models adjusted for age at interview, education and number of health profession visits
b
Excludes women who stated they had a bilateral mastectomy (N = 6)
c
p < 0.05