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Table 1 Demographics, smoking history, and family history by prior cancer group for 16,630 participants in the CGN (1998–2012)

From: Are rare cancer survivors at elevated risk of subsequent new cancers?

Characteristic No prior cancers (N = 5684) ≥1 prior common cancer (N = 8604) ≥1 prior rare cancer (N = 2342) Overall (N = 16,630)
Median (range) follow-up time (years) 7.1 (0–14.9) 7.9 (0–14.6) 4.9 (0–12.3) 7.3 (0–14.9)
Age at enrollment (years)
  < 40 1399 (25%) 383 (5%) 269 (12%) 2051 (12%)
 40–60 2663 (47%) 3567 (41%) 963 (41%) 7193 (43%)
  > 60 1622 (28%) 4654 (54%) 1110 (47%) 7386 (45%)
Female sex 3416 (60%) 4889 (57%) 1584 (68%) 9889 (59%)
Ever used tobacco products 1902 (33%) 3870 (45%) 826 (35%) 6598 (40%)
Any first-degree relative with cancer 5077 (89%) 5849 (68%) 1470 (63%) 12,396 (75%)