Table 1.
Demographic data for typically developing controls (TDC) and UHR individuals.
| TDC | UHR | UHR vs. TDC | |
|---|---|---|---|
| Number of individuals, n (males) | 48 (29) | 48 (29) | n.s. |
| Hand preference, n, right/non-right | 40/8 | 44/4 | n.s. |
| Parental education, years, mean (SD) | |||
| Mother | 13.45 (2.39) | 12.96 (2.16) | n.s. |
| Father | 14.22 (2.17) | 13.74 (2.18) | n.s. |
| Premorbid IQ, mean (SD) | 107.04 (13.12) | 100.40 (11.97) | t = 2.85, p = 0.01 |
| Age at baseline scan, years | |||
| Mean (SD) | 15.72 (1.54) | 15.43 (2.11) | n.s. |
| Range | 12.19–18.76 | 12.28–19.64 | |
| Age at 6-year FU scan, years | |||
| Mean (SD) | 21.40 (1.57) | 21.16 (2.42) | n.s. |
| Range | 17.57–24.54 | 16.84–25.79 | |
| Intra Cranial Volume (mm3) | 1,621,000 (148220) | 1,586,000 (167740) | n.s. |
| Number of scans, n | n.a. | ||
| Total number of scans, n | 103 | 122 | |
| 1 | 48 | 48 | |
| 2 | 24 | 39 | |
| 3 | 31 | 35 |
Notes: TDC = typically developing controls; UHR = Individuals at ultra-high risk for psychosis; IQ = intelligence quotient; SD = standard deviation; FU = follow-up.