Table 4.
Number of Relatives Diagnosed With Cancer as Reported by 1 (Index) Relative and as Reported by Multiple Relatives Within the Same Family, by Cancer Site (n = 546 Families), New York Breast Cancer Family Registry, 2007–2013
| Cancer Site | Index Relative Reporter |
Multiple Relative Reporters |
Mean Difference |
95% Confidence Interval |
||
|---|---|---|---|---|---|---|
| Mean (SD) | Range | Mean (SD) | Range | |||
| Any cancer | 2.5 (1.7) | 0–10 | 3.8 (2.5) | 0–17 | 1.2 | 1.1, 1.4 |
| Female breast cancer | 1.3 (1.1) | 0–8 | 1.9 (1.4) | 0–8 | 0.6 | 0.5, 0.6 |
| Ovarian cancer | 0.2 (0.6) | 0–3 | 0.3 (0.6) | 0–5 | 0.1 | 0.1, 0.2 |
Abbreviation: SD, standard deviation.