The Minimum Clinically Important Difference for Patient Health Questionnaire-9 in Minimally Invasive Transforaminal Interbody Fusion

Abstract

Our 2-year postoperative MCID analysis is the first mental health calculation from an MIS TLIF cohort. We report a 2-year MCID value for PHQ-9 of 3.0 (2.0-4.8). MCID values for mental health instruments are important for determining overall success of lumbar spine surgery.Level of Evidence: 3.