Table 1. No Significant Difference between Groups or Conditions was Observed in Any Variable, Except for Smoking Status (χ2=8.167, p=0.004) and Trend Level for the Maternal Portion of the PBI (F=3.323, df=1,22, p=0.082).
| Demographics (SD) | CHR n=12 | CHR-CU n=12 | Comparison |
|---|---|---|---|
| Age (years) | 23.00±4.6 | 24.25±4.7 | F=0.419, df=1,22, p=0.524 |
| Gender | |||
| Male | 7 | 6 | χ2=0.167, p=0.683 |
| Female | 5 | 6 | |
| Mother PBI | 35.83±5.8 | 40.42±6.5 | F=3.323, df=1,22, p=0.082 |
| Smoking status | |||
| Non-smoker | 11 | 8 | χ2=8.167, p=0.004 |
| Smoker | 1 | 4 | |
| Cigarettes/day | 10 | 9.13±8.0 | |
| Years of education | 14.08±3.1 | 13.25±1.8 | F=0.631, df=1,22, p=0.435 |
| Lifetime use (joints) | NA | 4892.91±4100.2 | |
| Years of cannabis use | NA | 9.64±4.8 | |
| Age at first cannabis use (years) | NA | 14.82±2.7 | |
| Number of joints per week | |||
| Control task | NA | 17.00±7.3 | |
| Stress task | NA | 14.36±7.8 | |
| Hours since last joint smoked | |||
| Control task | NA | 11.00±5.3 | |
| Stress task | NA | 13.3±5.8 | |
| Cannabinoids value (μg/l) | |||
| Control task | NA | 1852.81±2909.7 | |
| Stress task | NA | 2730.20±3347.4 | |
| SOPS symptoms | |||
| Positive | 11.25±2.9 | 12.64±2.0 | F=1.771, df=1,21, p=0.198 |
| Negative | 10.17±5.3 | 6.18±3.6 | F=4.356, df=1,21, p=0.049 |
| Disorganized | 4.17±2.1 | 4.36±2.5 | F=0.042, df=1,21, p=0.840 |
| General | 5.25±3.2 | 4.36±3.5 | F=0.410, df=1,21, p=0.529 |
| PET scan parameters | |||
| Amount injected (mCi) | |||
| Control task | 9.17±2.2 | 9.98±1.1 | F=1.325, df=1,22, p=0.262 |
| Stress task | 9.89±0.96 | 9.69±0.99 | F=0.247, df=1,22, p=0.624 |
| Specific activity (mCi/μmol) | |||
| Control task | 1014.84±434.3 | 1199.83±569.2 | F=0.801, df=1,22, p=0.380 |
| Stress task | 1003.82±470.6 | 1484.04±628.2 | F=4.492, df=1,22, p=0.046 |
| Mass injected (μg) | |||
| Control task | 2.58±0.90 | 2.26±0.96 | F=0.743, df=1,22, p=0.398 |
| Stress task | 2.92±0.90 | 1.93±0.90 | F=7.255, df=1,22, p=0.013 |
Abbreviations: CHR, clinical high; CHR-CU, cannabis-using CHR; NA, not applicable; PBI, Parental Bonding Index; PET, positron emission tomography; SOPS, Scale of Prodromal Symptoms.