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Mariah Diaz1, Aleksandra Mihailovic2, Louay Almidani2

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In glaucoma patients, depressive symptoms, female gender, and advanced visual field loss correlate with a greater difference between objective function and self-reported quality of life. Much of this discrepancy remains unexplained.

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Area of Science:

  • Ophthalmology
  • Vision Science
  • Rehabilitation Medicine

Background:

  • Glaucoma management requires understanding patient functioning and quality of life.
  • Discrepancies between objective functional measures and subjective patient reports are common in chronic conditions.
  • Identifying factors influencing these discrepancies is crucial for personalized care.

Purpose of the Study:

  • To quantify the agreement between objective functional metrics and self-reported quality of life in glaucoma patients.
  • To identify patient-specific and environmental factors associated with discrepancies between these measures.

Main Methods:

  • 227 individuals with glaucoma or suspected glaucoma were assessed.
  • Subjective functioning was measured using the Glaucoma Quality of Life-15 (GQL-15) questionnaire.
  • Objective functioning was a composite z-score of balance, gait, and reading speed. Discrepancy was calculated as the difference between composite function and GQL-15 scores. Linear regression identified associated factors.

Main Results:

  • Objective functioning and GQL-15 scores showed a weak correlation (r=0.15, P=0.024).
  • Female gender (β=0.53), depressive symptoms (β=0.19), and greater visual field damage (β=0.28) were associated with higher discrepancy (greater objective function than self-report).
  • These factors explained 20% of the variance in discrepancy.

Conclusions:

  • Female gender, depressive symptoms, and advanced visual field loss predict greater subjective disability than objective functional impairment in glaucoma.
  • The study highlights significant unexplained variability, underscoring the complexity of self-reported outcomes and functional assessments in glaucoma.
  • These findings emphasize the need for comprehensive evaluation considering both objective and subjective patient experiences.