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Table 3 Hereditary forms of CRC in two age groups.

From: Family history of colorectal cancer in Iran

Variable Total
(n = 449)
Early-onset
(n = 112)
Late-onset
(n = 337)
P Value
HNPCC 21(4.7%) 12(10.7%) 9(2.9%) <0.001
HCRC 15(3.4%) 9(8%) 6(1.7%) <0.001
One first-degree relative with CRC 26(5.8%) 7(6%) 19(5.6%) NS††
  1. †Assigns the significance of the differences between two group
  2. †† NS: Not significant
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