Table 6.
Variance components for air, hand rinse, and patch samples reported separately for multiple regression models that included as a measure of application size either kilogram captan a.i. applied or application method. Total variance was computed from a model containing worker-only as a random effect
| Application size measure | Worker-only model |
Model with random and fixed effects |
|||||||
| Total (between and within) | Variance ratioa, between-worker | Variance ratioa, within-worker | Between-worker |
Within-worker |
Fixedb | ||||
| TS2y(BS2y,WS2y) | BR0.95c | WR0.95d | BS2y(%) | BGSD | WS2y(%) | WGSD | % | ||
| Air | k.g. captan a.i. application method | 2.52 (1.87, 0.65) | 212 | 24 | 0.51 (20.2) | 2.0 | 0.79 (31.4) | 2.4 | 48.4 |
| 2.52 (1.87, 0.65) | 212 | 24 | 0.70 (27.8) | 2.3 | 0.71 (28.2) | 2.3 | 44.0 | ||
| Hand | k.g. captan a.i. application method | 4.87 (3.81, 1.06) | 2100 | 57 | 1.83 (37.6) | 3.9 | 1.05 (21.6) | 2.8 | 40.8 |
| 4.87 (3.81, 1.06) | 2100 | 57 | 1.77 (36.3) | 3.8 | 1.06 (21.8) | 2.8 | 41.9 | ||
| R. thigh | k.g. captan a.i. application method | 8.86 (8.02, 0.84) | 66300 | 36 | 4.82 (54.4) | 9.0 | 0.52 (5.8) | 2.1 | 39.8 |
| 8.86 (8.02, 0.84) | 66300 | 36 | 5.54 (62.5) | 10.5 | 0.60 (6.8) | 2.2 | 30.7 | ||
| L. thigh | k.g. captan a.i. application method | 9.12 (7.66, 1.46) | 51500 | 114 | 3.67 (40.2) | 6.8 | 1.26 (13.8) | 3.1 | 46.0 |
| 9.12 (7.66, 1.46) | 51500 | 114 | 5.41 (59.3) | 10.2 | 1.34 (14.7) | 3.2 | 26.0 | ||
| R. forearm | k.g. captan a.i. application method | 5.62 (3.70, 1.92) | 1880 | 229 | 2.10 (37.4) | 4.3 | 1.38 (24.6) | 3.2 | 38.0 |
| 5.62 (3.70, 1.92) | 1880 | 229 | 2.11 (37.5) | 4.3 | 1.90 (33.8) | 4.0 | 28.7 | ||
| L. forearm | k.g. captan a.i. application method | 6.21 (4.55, 1.66) | 4300 | 156 | 3.27 (52.6) | 6.1 | 0.62 (9.9) | 2.2 | 37.5 |
| 6.21 (4.55, 1.66) | 4300 | 156 | 3.20 (51.5) | 6.0 | 0.88 (14.2) | 2.6 | 34.3 | ||
K (number of individuals) = 72; N (number of measurements) = 134 (l. thigh), 136 (air, r. thigh), 137 (r. forearm), and 138 (hand and l. forearm). TS2y, total variance; BS2y, between-worker variance; BGSD, between-worker GSD; WS2y, within-worker variance; WGSD, within-worker GSD; R, right; L, left; LOD, limit of detection.
Caution should be used when comparing variance ratios computed using maximum likelihood estimation methods for data below the LOD (as we did) to variance ratios computed using substitution methods (e.g. LOD/2) for data below the LOD.
Percentage of the total variance explained by the fixed effects, i.e. % fixed = 100−[BS2y (%) + WS2y (%)] in model with random (worker) and fixed effects.
Computed as: e[3.92 ln(BGSD)].
Computed as: e[3.92 ln(WGSD)].