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Referrals in the second validation phase with 100 participants
| Referral indication | Questionnaire (n) | Phone interview (n) | False-negative (n) | False-positive (n) | Sensitivity (%, 95 % CI) | Specificity (%, 95 % CI) |
|---|---|---|---|---|---|---|
| Lynch syndrome | 8 | 5 | 0 | 3 | 100 (63–100) | 97 (91–99) |
| Familial colorectal cancer | 2 | 2 | 0 | 0 | ||
| Single colonoscopy | 1 | 1 | 0 | 0 |
