Table 1 Input variable probability distributions required to model pacifier exposure: (a) distributions used for blanket variables, (b) non-age dependent distributions used for pacifier variables, and (c) age-dependent distributions used for pacifier variables.
From: Model based prediction of age-specific soil and dust ingestion rates for children
(a) | (b) | (c) | |||||
Variable | Age groups | Distribution* | Variable | Distribution* | Variable | Age group | Distribution* |
P_blanket (probability of blanket use) | 0–<1 m, 1–<3 m, 3–<6 m | Uniform (0.8, 1.0) | Pacifier_size (cm2, size of pacifier) | Uniform (8, 11)1 | Pacifier_drop (hr-1, frequency of pacifier dropping) | 0–<1 m, 1–<3 m, 3–<6 m | Normal (8, 3)5 |
6–<12 m | Uniform (0, 1) | Pacifier_frac_hard (fraction of pacifier drops onto hard surface) | Point (0.25)2 | 6–<12 m | Normal (5, 2)6 | ||
1–<2 y | Uniform (0, 0.2) | Pacifier_frac_soft (fraction of pacifier drops onto soft surface) | Uniform (0.25, 0.5)2 | 1–<2 y | Normal (2, 1)5 | ||
2 y or older | Point (0) | Pacifier_transfer (fraction of dust transferred from floor to pacifier) | Uniform (0.25, 0.75)3 | P_Pacifier (probability of pacifier use) | 0–<1 m, 1–<3 m, 3–<6 m | Uniform (0.8, 1) | |
F_blanket (protective barrier factor) | All | Uniform (0.1, 0.4) | Pacifier_washing (efficiency of pacifier washing) | Point (0)4 | 6–<12 m | Uniform (0.5, 1) | |
