Estimated variance components for grouping according to department and type of machine with WORKER added as a second random effect, for log transformed total dermal exposure levels on hands and forearms, and log transformed airborne exposure levels
| Grouping variable | VITAE (N§ = 38, W = 27) | Pads (N = 51, W = 36) | DREAM (N = 51, W = 36) | Air (N = 46, W = 33) |
|---|---|---|---|---|
| §Total number of samples. | ||||
| †Number of groups. | ||||
| *Variance between groups. | ||||
| ‡Variance within groups (variance between workers). | ||||
| ¶Variance from day-to-day. | ||||
| **Contrast in exposure: between group variance/(between group variance + within group variance). | ||||
| Determinant based (department 1 and 2 versus 3 and 4) | G† = 2 | G = 2 | G = 2 | G = 2 |
| SSBG* | 1.54 | 0.05 | 0.27 | 0.00 |
| SSWG‡ | 1.55 | 0.00 | 0.00 | 0.06 |
| SSWW | 0.99 | 0.82 | 1.44 | 0.16 |
| Contrast¶ | 0.50 | 1.00 | 1.00 | 0.00 |
| Department | G = 3 | G = 4 | G = 4 | G = 4 |
| SSBG* | 0.95 | 0.03 | 0.19 | 0.00 |
| SSWG‡ | 1.64 | 0.00 | 0.00 | 0.06 |
| SSWW¶ | 0.94 | 0.82 | 1.43 | 0.16 |
| Contrast** | 0.37 | 1.00 | 1.00 | 0.00 |
| Type of machine operated | G = 3 | G = 4 | G = 4 | G = 4 |
| SSBG | 1.39 | 0.33 | 0.17 | 0.00 |
| SSWG | 2.17 | 0.00 | 0.18 | 0.03 |
| SSWW | 0.41 | 0.69 | 1.29 | 0.18 |
| Contrast | 0.39 | 1.00 | 0.48 | 0.00 |
| Department · type of machine | G = 6 | G = 8 | G = 8 | G = 8 |
| SSBG | 1.53 | 0.23 | 0.16 | 0.00 |
| SSWG | 1.79 | 0.00 | 0.15 | 0.03 |
| SSWW | 0.41 | 0.70 | 1.27 | 0.18 |
| Contrast | 0.46 | 1.00 | 0.51 | 0.00 |