Navigation, reminders and automatic referral raised colonoscopy completion after an abnormal FIT

Design

Systematic review and random-effects meta-analysis of 21 studies

Population

19,613 adults aged 50–75 with an abnormal FIT or FOBT

Primary outcome

Completion of follow-up colonoscopy

Effect

Pooled 47.8% vs 69.1%; navigation RR 1.24 (1.15–1.33); clinician reminders RR 1.36 (1.12–1.65)

This systematic review and meta-analysis pooled 21 randomised and non-randomised studies of 19,613 patients aged 50 to 75 who had an abnormal faecal immunochemical test or faecal occult blood test. It asked which interventions raised completion of the follow-up colonoscopy.

Across studies, completion rose from 47.8% in control groups to 69.1% with an intervention. Patient navigation (RR 1.24, 1.15–1.33), patient reminders (RR 1.32, 1.04–1.67), clinician reminders (RR 1.36, 1.12–1.65) and automated referral to gastroenterology (RR 1.68, 1.09–2.60) all helped. Heterogeneity was high, but fell to low for navigation and both kinds of reminder once outlying studies were removed; it stayed moderate for automated referral.

An abnormal stool test that is not followed by colonoscopy is a screening programme that has failed at its most important step. Roughly half of patients in the control groups never completed it. The interventions that work are unglamorous — someone who calls the patient, an alert that tells the clinician the loop is open, and a referral that books itself. Any clinic offering FIT can build at least one of these.

• Treat every abnormal FIT as an open loop until the colonoscopy result is filed.
• Use a registry or alert that flags abnormal results without a completed colonoscopy at 60–90 days.
• Where possible, generate the gastroenterology referral automatically at the time of the abnormal result.
• A named navigator who contacts the patient, explains bowel preparation and books the test raised completion.
• Patient reminders by message or letter are a low-cost first step.

Why it matters

Half of patients with an abnormal stool test never reached colonoscopy without a system to get them there.

Don't overread it

Most included studies were not randomised, and the effect of combining interventions was not established.

The statistics, in plain English

A risk ratio of 1.24 means about a quarter more patients completed colonoscopy with navigation. High heterogeneity (I² above 90% for some interventions) means the studies disagreed about the size of the effect, so the pooled numbers are a guide rather than a promise.

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