| MEASUREMENT PROPERTIES | |
| Limitations | |
| Observations |
Ophthalmologists experienced in the care of patients with ocular surface diseases can only perform this examination. Specific staining agents and the slit lamp are necessary |
| 1. RELIABILITY | |
| A. Internal Consistency | Not Tested |
| Cronbach's (Describe) | |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Reliability was assessed in an independent cohort. However, because this score is primarily used as a classification criterion, reliability was assessed 5 years apart to evaluate the stability of the score over time. Intrarater agreement in the precise numerical score was moderate to good (ICC = 0.74; 95% confidence interval [CI] 0.20-0.94). |
| C. Reliability interobserver or Measurement error | Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
Interrater numerical agreement was poor (ICC = 0.38; 95% CI −0.25 to 0.78). |
| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
|
| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Not Tested |
| Cross-cultural validity | Not Tested |
| Brief Description | |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
|