Of the 8033 participants with AL data, visual acuity measurements were available on 8016 (99.8%).
Principal component analysis and 2D-hierarchical cluster were performed on significant data using Acuity™ (Axon instruments) as described in Pons et al. [ 17].
Demographic data, visual acuity, source and type of ocular disorder and the type of refractive error were included in the questionnaire.
Demographic data, visual acuity, source and type of injury, type of refractive errors and diagnosis were collected and analyzed using SPSS.
There were no between-group differences in demographic and hospital data, including acuity and length of acute hospital stay (LOS) (Acute Physiology and Chronic Health Evaluation II score: 21 vs 19; hospital LOS: 20 vs 24 days).
To ensure masking of the outcomes data; visual acuity, refraction, corneal measurements and endothelial cell count measures at 3 and 12 months follow-up visits will be performed by a trial optometrist or technician without reference to previous patient medical notes or trial case report forms.
No grading scales or patient management guidelines were provided and the optometrists were not given any patient information, such as visual acuity data.
Visual acuity data were presented as dichotomous data —statistically significant improvement or no improvement from pre- to post-intervention.
The R values for both of these comparisons were moderate, 0.56 for the visual acuity data and 0.68 for the visual field data, suggesting that factors other than the ABCA4 genotype also play a role in the magnitude of both of these phenotypes in individual patients.
In order to see if the patients who visited on Sunday were more severe than the patients who visited on Thursday, we also generated data on patient acuity category (PAC), an indicator used by ED doctors to assess patients' acuity level.
