Table 1.
Demographic measures, cognitive measures, physical measures and current medication use of the groups.
| Schizophrenia Murderers (n = 22) |
Murderers (n = 18) |
Non-violent Schizophrenia (n = 19) |
Normal Controls (n = 32) |
Statistics | |||||
|---|---|---|---|---|---|---|---|---|---|
| Demographic Measures | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| Age | 34.68 | 13.0 | 31.39 | 12.89 | 33.11 | 10.09 | 32.03 | 9.89 | F (3,88) = 0.35, p = 0.79 |
| Socioeconomic status | 61.7 | 17.55 | 57.92 | 21.33 | 49.56 | 18.93 | 55.59 | 20.44 | F (3,88) = 1.25, p = 0.30 |
| Gender (Male/Female) | 3 / 19 | 2 / 16 | 3 / 16 | 4 / 28 | χ2 (3,88) = 0.20, p = 0.98 | ||||
| Cognitive Measures | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| Full scale IQ | 84.9 | 14.38 | 80.1 | 14.9 | 86.6 | 17.7 | 101.5 | 15.1 | F (3,88) = 9.09, p < 0.001 |
| (IQ range) | (78.2 – 91.6) | (72.2 – 88.0) | (78.1 – 95.2) | (96.1 – 107.0) | |||||
| Education (Years) | 7.32 | 4.22 | 9.00 | 5.45 | 11.63 | 2.97 | 8.83 | 4.26 | F (3,88) = 3.51, p = 0.019 |
| Physical Measures | |||||||||
| Taken to hospital for head injury (Yes/ no) |
3 / 19 | 3 / 15 | 0 / 19 | 5/ 27 | χ2 (3,88) = 3.84, p = 0.28 | ||||
| Whole brain volume (cm3) | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| 1235.14 | 109.12 | 1255.42 | 110.6 | 1274.55 | 113.9 | 1264.39 | 106.16 | F (3,88) = 0.49, p = 0.69 | |
| Medications | |||||||||
| Currently on anti- psychotic medications (Yes/ no) |
3/ 19 | 0/ 18 | 19/ 0 | 0/ 32 | χ2 (3,88) = 76.87, p < 0.001 | ||||