A prototype protocol for evaluating the real-world data set using a structured electronic health record in glaucoma

Purpose: As the first step in monitoring and evaluating day-to-day glaucoma care, this study reports all real-world data recorded during the first full year after the implementation of a prototype for glaucoma-specific structured electronic healthcare record (EHR).

Methods: In 2019, 4618 patients visited Tays Medical Glaucoma Clinic at Tays Eye Centre, Tampere University Hospital, Finland, that serves a population of 0.53 M. Patient data were entered into a glaucoma-specific EHR by trained nurses to be checked by glaucoma specialists. Tays Eye Centre follows the Finnish Current Care Guideline for glaucoma in which glaucoma is defined using a '2 out of 3' rule, that is, ≥2 findings evaluated as glaucomatous in optic nerve head (ONH), retinal nerve fibre layer (RNFL) and visual field (VF).

Results: The clinical evaluations of ONH, RNFL and VF were recorded in 95%-100% of all eyes. ONH was evaluated as glaucomatous more often (44%) than RNFL (33%) and VF tests (30%). Progressive changes in any of the three tests were recorded in 35% of the '≥2/3 glaucoma group' compared to 2%-9% in the other groups. The mean IOP at visit was 15 mmHg. The mean target IOP was 17 mmHg, and it was recorded in 94% of eyes.

Conclusion: The developed structured data presentation enables comparisons between different population-based real-world glaucoma data sets and glaucoma clinics. Compared to a data set from the UK, the proportion of glaucoma suspicion-related visits was smaller in Tays Eye Centre and test intervals were longer.