Table II.
Characteristics of the 35 participants and 22 non-participants and their second cancers (45/25).
| Participants (n = 35) | Non-participants (n = 22) | |
| Male gender,1 n (%) | 16 (46%) | 7 (32%) |
| Follow-up time in years1 median (range) | 29 (12–44) | 25 (10–38) |
| Age at first cancer in years1 median (range) | 5 (0–15) | 7.5 (2–16) |
| Age at second cancer in years1 median (range) | 27 (9–49) | 27.5 (7–38) |
| Time (in years) since last visit to LTFU clinic n (%) | ||
| < 1 | 14 (40%) | 4 (19%) |
| 1–2 | 3 (9%) | 4 (19%) |
| 2–3 | 4 (11%) | 5 (23%) |
| 3–4 | 3 (9%) | 3 (14%) |
| 5–6 | 7 (20%) | 2 (0%) |
| 6–7 | 3 (9%) | 3 (14%) |
| Unknown | 1 (3%) | 1 (4%) |
| Second cancers | n = 45 n (%) |
n = 25 n (%) |
| Brain tumor | 18 (40%) | 9 (36%) |
| BCC2 | 10 (22%) | 6 (24%) |
| Melanoma | 4 (9%) | 0 (0%) |
| Breast cancer | 2 (5%) | 3 (12%) |
| Other3 | 11 (24%) | 7 (28%) |
Notes: 1No significant difference between participants and non-participants (Mann-Whitney test). 2BCC basal-cell carcinoma. 3For example, thyroid carcinoma, osteosarcoma, urothelial carcinoma, sigmoid carcinoma, tongue carcinoma, and ovarian cancer.