Table 3:
Accuracy of ICD-9 code data in capturing infantile ocular diagnoses.
| Diagnosis | Positive Predictive Value | Negative Predictive Value | Sensitivity | Specificity |
|---|---|---|---|---|
| Conjunctivitis (N = 1,695) | 63.1% | 96.3% | 94.3% | 72.6% |
| Congenital nasolacrimal duct obstruction (N = 1,275) | 81.9% | 97.5% | 92.9% | 93.2% |
| Pseudostrabismus (N = 173) | 76.6% | 99.7% | 92.5% | 99.0% |
| Retinopathy of prematurity (N = 76) | 86.2% | 100.0% | 98.7% | 99.8% |
| Esotropia (all subtypes) (N = 40) | 34.8% | 99.8% | 77.5% | 98.9% |
| Ptosis (N = 39) | 77.4% | 99.7% | 61.5% | 99.9% |
| Preseptal cellulitis (N = 33) | 8.3% | 99.2% | 3.0% | 99.7% |
| Exotropia (all subtypes) (N = 31) | 62.5% | 99.7% | 48.4% | 99.8% |
| Subconjunctival hemorrhage (N = 26) | 77.8% | 99.9% | 80.8% | 99.9% |
| Physiologic anisocoria (N = 23) | 88.0% | 100.0% | 95.7% | 99.9% |
Abbreviations: N = number of cases confirmed via individual review of the medical record; ICD-9 = International Classification of Diseases, 9th Revision.