Abstract
Self-determination theory (SDT) guided behavioral interventions are effective in improving several patient-centered metrics, including glaucoma-related distress. However, whether improvement in patient-centered metrics can drive an improvement in medication-taking behavior remains to be seen. The 7-month Support, Educate, Empower (SEE) personalized glaucoma coaching program was previously shown to improve glaucoma medication adherence by 21 percent points. This study's goal was to assess the impact of the SEE program on self-determination theory (SDT) metrics and other patient-centered outcome measures. Glaucoma patients (≥40y old, taking ≥1 medication) self-reporting poor medication adherence were recruited at the University of Michigan. Eight surveys (with 10 subscales) were completed before and after the 7-month SEE program. Three surveys assessed changes in SDT (Treatment Self-regulation Questionnaire, Healthcare-Climate Questionnaire, Perceived Competence) while the others assessed participants' Glaucoma Knowledge, Glaucoma Medication Self-efficacy, Glaucoma-related distress, Perceived benefits, confidence asking and getting questions answered. Thirty-nine participants completed the SEE program. Significant improvements were in 7 subscales, including all three SDT tenets of competence (mean change =0.9, SD =±1.2, adjusted P =0.0002), autonomy (0.5, ±0.9, 0.044), and relatedness ( P =0.002). Glaucoma-related distress (-2.0, ±3.2, 0.004), confidence in asking questions (1.1, ±2.0, 0.008), and confidence in getting questions answered (1.0, ±2.0, 0.009) also improved. Glaucoma-related distress was correlated with perceived competence ( r =-0.56, adjusted P =0.005), and an increase in perceived competence was associated with a decrease in glaucoma-related distress (β=-0.43, 95% CI -0.67 - -0.20, adjusted P =0.007). The SEE program improved participants' autonomous motivation, perceived support, perceived competence, glaucoma-related distress, and competence. These results point to the promising potential of SDT-guided behavioral interventions in improving patient-centered metrics.
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