Table 2.
Neurocognitive, frontal systems, and behavioral characteristics by group.
| METH+ | METH− | ||
|---|---|---|---|
| Characteristic | Mean +/− SD | Mean +/− SD | Statistics a |
| Neurocognitive Characteristics | |||
| Global Deficit Score | 0.4 ± 0.3 | 0.3 ± 0.3 | t(35.30)=−0.81, p=0.42 |
| % Impaired on Global Deficit Score | 10% | 10% | χ2(n=1)=0.01, p=0.94 |
| Frontal Systems Behavior | |||
| Sensation Seeking | 55.6 ± 9.0 | 52.3 ± 7.9 | t(31.89)=−1.19, p=0.24, g=−0.4 |
| Impulsivity/Disinhibition | 68.3 ± 11.7 | 49.8 ± 8.6 | t(28.17)=−5.51, p<0.001, g=−1.7 |
| Apathy | 76.9 ± 14.3 | 49.3 ± 7.4 | t(22.42)=−7.26, p<0.001, g=−2.3 |
| Iowa Gambling Task Total (Trials 21-100) | −0.1 ± 25.9 | 20.2 ± 28.0 | t(36.02)=2.37, p=0.02, g=0.7 |
| Urgency, Premeditation, Perseverance, and Sensation Seeking Impulsive Behavior Scale | |||
| Sensation Seeking Scale | 32.8 ± 6.5 | 34.4 ± 7.1 | t(36.26)=0.75, p=−.46, g=0.24 |
| Lack of Premeditation Scale | 25.1 ± 4.8 | 19.2 ± 4.0 | t(30.77)=−4.12, p<0.001, g=−1.3 |
| Urgency Scale | 34.2 ± 6.9 | 21.6 ± 6.4 | t(33.11)=−5.93, p<0.001,g=−1.9 |
| Lack of Perseverance Scale | 23.8 ± 4.7 | 17.9 ± 4.6 | t(34.12)=−3.96, p<0.001, g=−1.3 |
| Kalichman Sexual Sensation Seeking Scale | |||
| Non-Sexual Sensation Seeking Scaled Mean | 2.4 ± 0.7 | 2.3 ± 0.6 | t(30.99)=−0.53, p=0.60, g=−0.2 |
| Sexual Sensation Seeking Scaled Mean | 2.5 ± 0.7 | 1.9 ± 0.6 | t(29.48)=−2.69, p=0.01, g=−0.9 |
| Sexual Compulsivity Scaled Mean | 2.0 ± 0.9 | 1.3 ± 0.5 | t(25.06)=−2.88, p=0.01, g=−0.9 |
| Barratt Impulsivity Scale | |||
| Total | 78.0 ± 13.7 | 57.3 ± 11.7 | t(31.33)=−5.02, p<0.001, g=−1.6 |
| Attentional Subscale | 21.1 ± 4.1 | 14.5 ± 3.5 | t(31.17)=−5.35, p<0.001, g=−1.7 |
| Motor Subscale | 24.6 ± 5.9 | 18.6 ± 4.6 | t(29.41)=−3.54, p<0.001, g=−1.1 |
| Non-Planning Subscale | 32.2 ± 5.3 | 24.2 ± 5.1 | t(33.94)=−4.80, p<0.001, g=−1.5 |
a
Statistical comparisons were by means of Welsh t-tests or χ2 tests for equality of proportions, and Hedge’s g to report effect sizes.