We tested the possible effect of these different parameters using a general linear regression model with mixed-effects fitted by restricted maximum likelihood [33].
As shown in Table 1, five of the existing indoor models (one-box model, one-box model with mixing factor, two-zone model, multibox model, and eddy-diffusion model) were considered compatible to the general principle of environmental exposure models, used for the assessment of human health effects in LCA.
The sensitivity analysis through specifying models with different mix of variables to test the robustness of results was applied in only four studies.
The effects of exposure on changes in symptom severity rating over time (hypothesis 1) were analyzed via mixed linear models (with Proc Mixed in SAS; version 9.2, SAS Institute Inc., Cary, NC), with the change in severity from baseline S2 to another time point (during or after exposure) as the response.
The hydration model starts with mix proportions of low-calcium fly ash blended concrete and considers Portland cement hydration and low-calcium fly ash reaction respectively.
In the model used here, individual infectious contacts were assumed independent and at random but models with heterogeneous mixing [ 35] and that consider genetic susceptibility among relatives [ 36, 37] may be more appropriate.
The city agreed that Jane should have a bilingual aide, but wanted to move her to another school: one that used a teaching model with a mix of 25 special ed and general ed students, and two teachers.
Choi and Zhou (2002) proved similar results for a class of models with covariate-dependent mixing proportions.
However, validation and calibration of the models with more HMA mixes and field data is strongly recommended.
This suggests that meta-population models with inter-generational mixing could be employed to evaluate prolonged school-closures, a proposed pandemic mitigation measure that could expose grandparents, and other elderly surrogate caregivers for working parents, to infectious children.
