Table 1.
Characteristics of the Study Population
| Risk Presentation Format | All Women n=279 |
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|---|---|---|---|---|---|---|
| Lifetime Risk Percentages n=34 |
Lifetime Risk Frequencies n=53 |
Lifetime Risk Frequencies + Graphical Display n=77 |
Lifetime + Age-Related Risk Frequencies n=60 |
Lifetime + Age-Related Risk Frequencies + Graphical Display n=55 |
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| Age in years, mean (SD), range | 43 (13), 18- 66 | 41 (11), 22–63 | 42 (12), 19–70 | 40 (12), 18–64 | 41 (10), 22–62 | 41 (11), 18–70 |
| Educationa, n (%) | ||||||
| Low | 3 (9) | 7 (13) | 12 (17) | 10 (17) | 7 (14) | 39 (14) |
| Intermediate | 17 (50) | 25 (47) | 25 (35) | 28 (47) | 23 (44) | 118 (44) |
| High | 14 (41) | 21 (40) | 35 (49) | 22 (37) | 22 (42) | 114 (42) |
| Married or cohabiting, n (%) | 24 (71) | 40 (76) | 59 (80) | 47 (80) | 48 (91) | 218 (80) |
| Number of children, mean (SD) | 1.4 (1.4) | 1.5 (1.5) | 1.7 (1.3) | 1.7 (1.3) | 1.5 (1.0) | 1.6 (1.3) |
| Ethnicity, n (%) | ||||||
| Both parents Dutch | 26 (77) | 48 (93) | 65 (88) | 53 (90) | 50 (94) | 242 (90) |
| Parents not Dutch | 8 (24) | 4 (8) | 9 (12) | 6 (11) | 3 (6) | 31 (11) |
| Family history of breast cancer | ||||||
| 1st degree relatives affected, mean (SD) | 1.4 (0.5) | 1.4 (0.7) | 1.3 (0.6) | 1.2 (0.5) | 1.3 (0.6) | 1.3 (0.6) |
| 2nd degree relatives affected, mean (SD) | 2.0 (1.1) | 2.1 (1.1) | 1.9 (1.0) | 1.8 (1.0) | 1.9 (1.1) | 1.9 (1.0) |
| Women’s breast cancer riskb, n (%) | ||||||
| Not or slightly increased (10–20%) | 15 (44) | 22 (42) | 31 (40) | 26 (43) | 33 (60) | 127 (46) |
| Moderately increased (20–30%) | 12 (35) | 19 (36) | 24 (31) | 17 (28) | 10 (18) | 82 (29) |
| Highly increased (30–40%) | 7 (21) | 12 (23) | 22 (29) | 17 (28) | 12 (22) | 70 (25) |
Notes: aLow: primary school, lower level of secondary school, lower vocational training. Intermediate: higher level of secondary school, intermediate vocational training. High: higher vocational training, university. bAs estimated by the counselor during a standard genetic counseling before risk consultation. The not or slightly increased risk group included two women with population breast cancer risk in each group.
Abbreviation: SD, standard deviation.