Characteristics of the subjects (Si) and the controls (Ci).

1Indicates the years since the sibling's diagnosis of cancer.2Indicates whether the sibling died of the cancer or not.3Indicates whether the subjects or controls had had psychotherapy. In the case of S5 and S7, both received psychotherapy because of their trauma. F = female. M = male.There was no significant difference between subjects and controls for age, sex, socio-economic status and education.