Longer appointment duration reduces future missed appointments in safety-net clinics

To determine whether longer prior appointment durations are associated with reduced missed appointment rates.

Retrospective cohort study at a large Texas federally qualified health center network.

The dependent variable was missed appointments, and the primary independent variable was prior appointment duration. Other independent variables included sociodemographic (age, sex, race/ethnicity, insurance status), geographic (distance to the clinic, residence in a medically underserved area [MUA]), and clinical (visit history, visit type, visit dates, days between visits) factors. We used mixed-effects logistic regression to examine the relationship between prior appointment duration and missed appointments.

The study sample included 28,090 unique patients who had 56,180 appointments. The regression model demonstrated that longer prior appointment duration was associated with a lower likelihood of a missed appointment (OR, 0.90; 95% CI, 0.88-0.92). Being Hispanic or non-Hispanic Black (Hispanic: OR, 1.08; 95% CI, 1.03-1.15; Black: OR, 1.49; 95% CI, 1.38-1.61), lacking insurance (OR, 1.47; 95% CI, 1.38-1.57), and living 40 or more miles from the clinic (OR, 1.21; 95% CI, 1.08-1.36) were associated with higher odds of missing appointments. In contrast, living in an MUA (OR, 0.92; 95% CI, 0.82-0.96), having 3 or more previous visits (3-4 visits: OR, 0.87; 95% CI, 0.82-0.93), having more days between visits (91-180 days between visits: OR, 0.54; 95% CI, 0.50-0.59), and scheduling visits with physicians (OR, 0.90; 95% CI, 0.86-0.95) were associated with lower odds of missing appointments.

Duration of past appointments is inversely correlated with future missed appointment rates. Efforts to lengthen appointment times may have important effects on quality and health outcomes.