TABLE 1.
Demographic characteristics and study measures
| Demographic characteristics | SC | CTL | Statistic | df | p value | |
|---|---|---|---|---|---|---|
| Total N | 103 | 135 | ||||
| Sex | % Male | 58.3% | 37.0% | 10.579 | 1 | <.001* |
| Age | Mean (SD) | 46.63 (12.54) | 54.71 (16.75) | 16.790 | 1, 236 | <.001* |
| Education (years, self) | Mean (SD) | 12.44 (2.72) | 14.92 (2.43) | 54.355 | 1, 234 | <.001* |
| Education (years, parental)a | Mean (SD) | 12.34 (2.90) | 12.61 (3.02) | 4.053 | 1, 220 | .500 |
| WRAT | Mean (SD) | 92.44 (15.94) | 108.34 (8.43) | 81.136 | 1, 191 | <.001* |
| Study measures | ||||||
| Age of onset | Mean (SD), N | 21.53 (7.75), 85 | ||||
| SANS | Mean (SD), N | 1.56 (1.04), 90 | ||||
| SAPS | Mean (SD), N | 0.93 (0.73), 89 | ||||
| Cognition Factor Scoreb | Mean (SD), N | −3.51 (2.67), 77 | 0.00 (1.00), 135 | 163.606 | 1, 208 | <.001 |
| Community Functioning Factor Scoreb | Mean (SD), N | −17.26 (3.66), 103 | 0.00 (1.00), 88 | 1775.419 | 1, 187 | <.001 |
Note: Results of one-way ANOVAs for age and education are reported with the F statistic, and results for sex are reported with the Pearson chi-square statistic. Age and sex were entered as covariates for cognitive and community functioning only. Cognition and Community Functioning Scores were standardized based on the control group.
Abbreviations: CTL, Control; SANS, Scale for the Assessment of Negative Symptoms; SAPS, Scale for the Assessment of Positive Symptoms; SC, Schizophrenia; WRAT, Wide Range Achievement Test.
Parental education is the average of maternal and paternal years of education. For those individuals that were missing one, the other was substituted. Eighty-two individuals were missing both maternal and paternal education.
See Data reduction section in Data S1 for details regarding creation of factor scores.
Significant at p < .05.