Uncertainty is only one aspect of several variables conceptualized within cognitive models.
Figure 5 shows the evolution of several variables over time within the cell.
The NAMCS staff imputed missing data to help compensate for item nonresponse involving several variables of interest within our study.
We identified broad categories of factors that influence the adoption or fuel choice decision, found several variables of interest within each category [see Supplemental Material, Table 1 (http://dx.doi.org/10.1289/ehp.1104194)], and applied the vote-counting method to each variable.
For several variables, analyses were not possible within the whole study group because of missing data or because variables had not been investigated in all three surveys.
The number of hospitals was too small to include several variables measuring hospital specific information within a multilevel analysis framework, but this approach should nevertheless be considered in future research.
Not only did it tap into the various segments that make up "community", but also within those constructs we attempted to obtain several variables.
For these reasons, several variables might have been recorded differently from study to study and possibly within some studies.
With dirty thighs as the response variable, several variables were tested in a logistic regression mixed model and with repeated measurements within herd and cow.
