Subjects with missing data for the modelled variables (N = 49) were excluded, yielding a study population of 4,259 individuals.
The modelled variables were used for a classification of fuel types compatible with the continuous data.
MCA searches for principal components, which are new quantitative modelled variables, constructed as linear functions of the initial variables.
The log modelled variable is a spatially smooth covariate with no adjustment for the environment, so it cannot capture higher measurements at the roadside and lower background measurements.
Nevertheless, compression applies to every modelled variable in a differential equations model.
Thus, models of biologics that have focused on short-term disease activity, measured as DAS28 28 or with HAQ 23 24 as the single explicitly modelled variable, offer a limited perspective.
Activity times are modelled as random variables with a β-distribution.
Exposures were modelled as categorical variables with P-values for tests for linear trend calculated by inclusion of the continuous measure of dose in regression models.
Quartiles of the summary acrylamide measure were created based on the distribution of the control group, and modelled as categorical variables with the lowest quartile as referent group.
For these analyses depression, loneliness and happiness were recoded as binary and modelled separately as dependent variables with parental and marital status, health, gender and living situation as independent predictors.
