Table 4.
Univariate analysis of variance and multiple regression analysis of 510 DAT SPECT in healthy volunteers
| Univariate analysis of variance | ||||
| Between-subject effects | Degrees of freedom | Mean square | F | p-value |
| Sex | 1 | 27.712 | 2.256 | 0.134 |
| Age | 1 | 103.041 | 8.390 | 0.004 |
| Sex × age | 1 | 49.038 | 3.993 | 0.046 |
| Scan start time | 1 | 0.193 | 0.16 | 0.900 |
| Error | 505 | 12.281 | ||
| R2 = 0.028 (R2adj = 0.020) | ||||
| Multiple regression analysis | ||||
| Model | B (unstandardized coefficient) | t | p-value | |
| (Constant) | 10.610 | 22.134 | < 0.001 | |
| Age | −0.063 | −15.18 | < 0.001 | |
| Scan start time | 0.263 | 2.024 | 0.043 | |
| Sex | 0.461 | 3.819 | < 0.001 | |
The dependent variable is the average SBR for the right and left striatum. Independent variables are sex, age, and scan start time