Table 1 Validation tests of the translated questionnaire. Test-retest reliability showed a strong correlation, and inter-rater reliability showed a good agreement in the fundoscopy technique and optic disc margins questions, and a moderate agreement in the cup-to-disc ratio and macular evaluation question. Internal consistency was α = 0.82
Pearson correlation (test-retest reliability) | Cohen’s kappa (inter-rater reliability) | P-value | |
|---|---|---|---|
Question 1: fundoscopy technique | 0.83 | 0.61 | < 0.01 |
Question 2: cup-to-disc ratio | 0.78 | 0.51 | < 0.01 |
Question 3: optic disc margins | 0.74 | 0.64 | < 0.01 |
Question 4: macula evaluation | 0.80 | 0.53 | < 0.01 |