Table 1.
Participant characteristics of the first 247 participants with complete data.
| Healthy Controls (n = 42) | Relatives(n = 74) | People with Psychosis (n = 131) | Statistic | Pairwise comparison | |
|---|---|---|---|---|---|
| Mean age (SD) | 39.19 (13.58) | 44.49 (13.98) | 38.48 (12.59) | F (2244) = 5.12, p =.007 | PwP < Rel** |
| Female sex | 21 (50.0%) | 49 (66.2%) | 57 (43.5%) | χ2 (2247) = 9.80, p =.007 | PwP < Rel** |
| Racial identity | - | - | - | χ2 (10,247) = 15.44, p =.117 | - |
| Caucasian, not of Hispanic origin | 36 (85.7%) | 67 (90.5%) | 91 (69.5%) | - | - |
| African American, not of Hispanic origin | 3 (7.1%) | 4(5.4%) | 24 (18.3%) | - | - |
| Asian or Pacific Islander | 1 (2.4%) | 0 | 5 (3.8%) | - | - |
| Hispanic | 1 (2.4%) | 1(1.4%) | 4 (3.1%) | - | - |
| American Indian or Alaska Native | 0 | 0 | 1 (0.8%) | - | - |
| Other | 1 (2.4%) | 2(2.7%) | 6 (4.6%) | - | - |
| Participant years of education | 15.88 (2.48) | 15.05 (2.33) | 14.04 (2.09) | F (2244) = 12.51, p <.001 | PwP < Con***PwP < Rel** |
| Parent education | 5.43 (1.38) | 5.13 (1.15) | 5.03 (1.15) | F (2237) = 1.70, p =.185 | - |
| WAIS IQ estimate | 106.36 (11.77) | 102.03 (11.01) | 97.24 (11.74) | F (2244) = 11.25, p <.001 | PwP < Con***PwP < Rel* |
| BPRS total | 27.40 (4.05) | 32.01 (6.47) | 45.63 (11.92) | F (2244) = 82.13, p <.001 | PwP > Con***PwP > Rel***Con < Rel* |
| SANS total (global scores) | - | - | 6.81 (3.96) | - | - |
| SAPS total (global scores) | - | - | 5.21 (4.32) | - | - |
| SPQ total | 6.86 (6.94) | 14.04 (13.00) | 30.27 (15.02) | F (2244) = 64.91, p <.001 | PwP > Con***PwP > Rel***Con < Rel* |
Note:
*
p < .0
**
p < .01
***
p < .001
Con = Healthy Controls; Rel = Relatives; PwP = People with Psychosis; Parent education (coded: 1 = 7th grade or less, 2 = 7th –9th grade, 3 = 10th –12th grade, 4 = high school graduate/ GED, 5 = partial college/ vocational/technical school, 6 = 4-year college/ university graduate, 7 = graduate degree, 9 = unknown); WAIS = Wechsler Adult Intelligence Scale; BPRS = Brief Psychiatric Rating Scale; SANS = Scale for the Assessment of Negative Symptoms (completed by PwP only); SAPS = Scale for the Assessment of Positive Symptoms (completed by PwP only); SPQ = Schizotypal Personality Questionnaire