TABLE 1.

Study Outcome Measures

Variable	Definition	Numerator	Denominator
Colonoscopy completed	A colonoscopy is completed within 12 mo of the patient receiving confirmation of the scheduled test date	No. of patients with completed colonoscopy within 12 mo	No. of patients scheduled for a colonoscopy during the study period
Adequate bowel preparation qualitya	Bowel preparation is considered adequate (excellent, good, or fair) by the endoscopist performing the colonoscopy	No. of patients with adequate bowel preparation	No. of patients with a performedb colonoscopy during the study period
Missed appointment/no show	Patient does not appear for his or her scheduled appointment and did not cancel in advance	No. of missed appointments/no shows without prior cancellation	No. of scheduled colonoscopies during the study period
Cancellation <24 h prior to appointment	Patient cancels his or her appointment <24 h before the scheduled appointment	No. of cancellations <24 h before the scheduled appointment	No. of scheduled colonoscopies during the study period
Results communicated to the patient	Records indicate that communication was received by the patient regarding results of the colonoscopy examination	No. of patients who received communication about their results	No. of patients with a completed colonoscopy during the study period
Results communicated to the PCPc	Records show that communication was received by the PCP regarding results of the colonoscopy examination	No. of patients whose PCP received communication about their results	No. of patients with a completed colonoscopy during the study period
Final recommended rescreening interval consistent with clinical guidelines	The no. of mo/y recommended by the endoscopist until the next colonoscopy is consistent with US Preventive Services Task Force and US Multi-Society Task Force on Colorectal Cancer clinical guidelines (for PN group this is after navigator intervention if it was needed to ensure consistency with guidelines)	No. of patients who were recommended a screening interval that was consistent with clinical guidelines	No. of patients with a completed colonoscopy during the study period

Abbreviations: PCP, primary care provider; PN, patient navigation.

^aNearly all endoscopy centers in New Hampshire participate in a research-funded colonoscopy registry called the New Hampshire Colonoscopy Registry. The New Hampshire Colonoscopy Registry Colonoscopy Procedure Form instructs endoscopists to score the bowel preparation based on the worst prepared segment after clearing all colon segments, using the following categories: excellent (essentially 100% visualization), good (very unlikely to impair visualization), fair (possibly impairing visualization), and poor (definitely impairing visualization). Poor preparation is considered inadequate. Therefore, bowel preparation assessment in the current study was likely to be more consistent (and consistently noted) by endoscopists than in centers without similar research.

^bA performed colonoscopy is one that was initiated, regardless of whether it was complete or incomplete. A colonoscopy may be incomplete for several reasons, including inadequate bowel preparation.

^cResults communicated to the patient and PCP were defined differently for navigated versus non-navigated patients. For navigated patients, we were able to assess whether the results were received by the patient because this was documented by the navigator in the Catalyst records after discussion with the patient. Navigators also confirmed that results had been sent to the PCPs. For the non-navigated patients, we were able to assess whether the results had been sent to the patients and to their PCP through documentation in the clinic records (ie, via letter or telephone message).