Table 3.
Prediction of proportion of correct responses in metaphor trials based on cognitive and clinical characteristics.
| Covariatea | Effect of group in model |
Effect of covariate in model |
||
|---|---|---|---|---|
| Coefficient (CI) | Wald-χ2 | Coefficient (CI) | Wald-χ2 | |
| Age | 1.025 (0.617, 1.434) | 24.187, p < .001 | −0.018 (−0.035, 0.000) | 3.933, p = .047 |
| Years education | 0.770 (0.347, 1.193) | 12.736,p < .001 | 0.078 (0.026, 0.130) | 8.618, p = .003 |
| FSIQb | 0.755 (0.281, 1.228) | 9.759, p = .002 | 0.012 (−0.002, 0.026) | 2.818, p = .093 |
| NARTc | 0.837 (0.383, 1.292) | 13.044, p < .001 | 0.009 (−0.006, 0.025) | 1.449, p = .229 |
| TOMd | 0.858 (0.395, 1.321) | 13.190, p < .001 | 0.014 (−0.025, 0.054) | 0.513, p = .474 |
| PANSSe total | n/a | n/a | −0.003 (−0.016, 0.010) | 0.211, p = .646 |
| PANSS positive | n/a | n/a | 0.011 (−0.048, 0.027) | 0.314, p = .575 |
| PANSS negative | n/a | n/a | 0.010 (−0.028, 0.047) | 0.250, p = .617 |
| PANSS general | n/a | n/a | −0.011 (−0.037, 0.015) | 0.717, p = .397 |
a
Regressions were computed across groups with group and the respective covariate as predictors. As PANSS scores were only available for patients, healthy controls were not included and the group predictor removed from the model.
b
Full Scale IQ taken from the WASI.
c
National Adult Reading Test (NART).
d
Theory of mind measure, estimated using the Revised Eyes Test.
e
Positive and Negative Symptom Scale for Schizophrenia.