Table 6.
Risk for High-Risk Adenoma and Large Serrated Polyps Stratified by Baseline Colonoscopy Findings in the New Hampshire Colonoscopy Registry
| Surveillance colonoscopy finding | ||
|---|---|---|
| Baseline finding | HRA,a % (n) | SPb ≥10 mm, % (n) |
| No adenoma | 4.8 (116/2396) | 0.7 (18/2396) |
| LRAc | 9.7 (96/991) | 0.5 (5/991) |
| HRA | 18.2 (11/603) | 1.0 (6/603) |
| LRA + SSP | 18.4 (9/49) | 8.2 (4/49) |
| HRA + SSP | 46.4 (13/28) | 3.6 (1/28) |
| SSA/Pd | 2.9 (3/104) | 9.6 (10/104) |
| SP ≥10 mm | 3.1 (2/65) | 12.3 (8/65) |
NOTE. From Anderson et al,41 adapted with permission. Previously unpublished data provided through personal communication with JC Anderson, LF Butterly, CM Robinson, March 14, 2018, with permission.
HRA, high-risk adenoma; LRA, low-risk adenoma; SSA/P, sessile serrated adenoma/polyp.
a
HRA includes advanced neoplasia or >2 adenomas.
b
SP includes HP, SP, or TSA.
c
LRA includes 1–2 adenomas <10 mm in size.
d
Included TSA in SSA/P group.