← Back to Resources
Discharge & Comprehension

Why Teach-Back Exists (And What Gap It's Closing)

Published September 20, 2026

The teach-back method asks a patient to explain, in their own words, what they were just told about their diagnosis, treatment, or care plan. If they can't, the clinician knows immediately and can try again, rather than finding out days later when something goes wrong at home.

The method addresses a specific gap. The Indian Health Service's teach-back guidance states that studies have shown 40 to 80 percent of the medical information patients receive is forgotten immediately, and that nearly half of the information retained is incorrect. The page does not name the studies behind those figures.

A 2020 study in a Dutch emergency department compared two consecutive groups of patients: 239 discharged the standard way and 244 discharged with teach-back. In the standard-discharge group, 49% left with a comprehension deficit in at least one area of their discharge information, most commonly return precautions, where 41.3% showed a deficit. In the teach-back group, 11.9% left with a deficit. The teach-back conversation added 1 minute 39 seconds on average. The study was not randomized, and patients who did not speak sufficient Dutch were excluded.

Teach-back isn't a test of the patient. It's a check on whether the explanation itself worked, because a nod doesn't show whether the explanation landed or the patient simply wants to wrap up the conversation.

The 40 to 80 percent figure is quoted from the Indian Health Service's Health Communications teach-back page (ihs.gov), which does not cite the underlying studies. Comprehension-deficit figures (49.0% with standard discharge, 11.9% with teach-back, 41.3% return-precautions deficit with standard discharge, 1:39 minutes added on average) are from Mahajan M, et al. The impact of teach-back on patient recall and understanding of discharge information in the emergency department: the Emergency Teach-Back (EM-TeBa) study. International Journal of Emergency Medicine, 2020, a single-center prospective cohort study in an urban non-academic hospital in the Netherlands, with consecutive groups that were not randomized.