Table 2.
Convergence insufficiency symptom survey scores and CI clinical measures, between group comparisonsa.
| Criterion measure | HC (N = 20) | SZ (N = 20) | t/χ2 | p-Value |
|---|---|---|---|---|
| CISS | 9.9 ± 5.5 | 18.6 ± 9.9 | t = 3.43 | 0.001 |
| <21 | 19 | 12 | ||
| ≥21 | 1 | 8 | ||
| CI | ||||
| CI negative | 19 | 17 | Fischer | 0.60 |
| CI positive | 1 | 3 | Exact test | |
| NPC criteria | ||||
| ≤5.5 cm | 14 | 13 | χ2 = 0.11 | 0.73 |
| >5.5 cm | 6 | 7 | ||
| Sheard’s criteria | ||||
| True | 1 | 7 | Fischer | 0.02 |
| False | 19 | 13 | Exact test | |
| Phoria criteria | ||||
| True | 9 | 8 | χ2 = 0.10 | 0.75 |
| False | 11 | 12 | ||
| NPC break (cm) | 4.4 ± 2.37 | 5.5 ± 2.95 | t = 1.30 | 0.20 |
| NPC recover (cm) | 6.88 ± 3.28 | 8.45 ± 3.02 | t = 1.57 | 0.12 |
| Cover test (PDb) | −2.35 ± 3.45 | −3.95 ± 6.76 | t = 0.94 | 0.35 |
χ2 statistic includes Yate’s correction. Fischer’s exact test was used when there were less than five cases in a cell in a given contingency table.
aMean ± SD unless indicated otherwise; SZ, schizophrenia; HC, healthy control.
bPD prism diopters, near phoria – distance phoria.