Table 4:
Positive predictive value of ICD-9 codes in capturing infantile ocular diagnoses in eye specialists versus non-eye specialists.
| Diagnosis | Overall PPV | PPV when diagnosed by eye specialista | PPV when diagnosed by non-eye specialist | P-valueb |
|---|---|---|---|---|
| Conjunctivitis (N = 1,695) | 63.1% | 26.8% (N=22) | 63.9% (N=1,673) | <0.001 |
| Congenital nasolacrimal duct obstruction (N = 1,275) | 81.9% | 87.2% (N=96) | 81.6% (N=1,179) | 0.17 |
| Pseudostrabismus (N = 173) | 76.6% | 85.9% (N=165) | 25.0% (N=8) | <0.001 |
| Retinopathy of prematurity (N = 76) | 86.2% | 92.6% (N=76) | N/Ac | - |
| Esotropia (all subtypes) (N = 40) | 34.8% | 36.8% (N=36) | 23.1% (N=4) | 0.34 |
| Ptosis (N = 39) | 77.4% | 83.3% (N=30) | 57.1% (N=9) | 0.14 |
| Preseptal cellulitis (N = 33) | 8.3% | N/Ad | 12.5% (N=33) | - |
| Exotropia (all subtypes) (N = 31) | 62.5% | 60.9% (N=23) | 100.00% (N=8) | 0.43 |
| Subconjunctival hemorrhage (N = 26) | 77.8% | 87.5% (N=9) | 73.7% (N=17) | 0.43 |
| Physiologic anisocoria (N = 23) | 88.0% | 95.5% (N=21) | 33.3% (N=2) | 0.002 |
Abbreviations: N = number of cases confirmed by review of the medical record; PPV = positive predictive value.
a
Eye specialist was defined as an ophthalmologist or optometrist.
b
P-values calculated using Chi-square test comparing PPV in eye specialists versus non-eye specialists.
c
No cases of retinopathy of prematurity were diagnosed non-eye specialists.
d
No cases of preseptal cellulitis were diagnosed eye specialists.