Supplemental Table 1. Definition of quality measures.
| Name | Description | Numerator | Denominator |
| Adenoma 1 Detection Rate (ADR) | Proportion of colonoscopies in which at least 1 adenoma was detected | Number of colonoscopies in which ≥ 1 adenoma 1 was found | Number of colonoscopies performed |
| Serrated and adenoma polyp detection rate (SADR) | Proportion of colonoscopies in which at least 1 adenoma or Clinically Significant Serrated Polyp (CSSP) 2 was detected | Number of colonoscopies in which at least 1 adenoma or CSSP was found | Number of colonoscopies performed |
| Polyp detection rate (PDR) | Proportion of colonoscopies in which at least one polyp was detected | Number of colonoscopies in which at least one polyp was found | Number of colonoscopies performed |
| Adenoma detection rate (ADR-Plus) | The average number of adenomas in colonoscopies with > 1 adenoma | Average number of adenomas | Colonoscopies with > 1 adenoma |
| Serrated and adenoma polyp detection rate-plus (SADR-plus) | The average number of adenomas or CSSP in colonoscopies with > 1 adenoma | Number of adenomas or CSSP | Colonoscopies with > 1 adenoma |
CSSP, clinically significant serrated polyp
1
Adenoma defined as a polyp including tubular, tubulovillous or villous histological characteristics or CRC with no mention of underlying histology.
2
CSSP defined as: CSSP was defined as any sessile serrated adenoma/polyp, traditional serrated adenoma or hyperplastic polyp (HP) > 1 cm anywhere in the colon or an HP > 5 mm found in the proximal colon 30