Fifty-three percent of non-smokers had cotinine values greater than category zero, but only 1 had a value of 5 or 6.
They were computed as discrete differences from the reference category (zero for binary variables, and as mentioned in the table for categorical variables).
We used the factor scores to predict the category (zero, moderate, and high incidence) of heat-related health outcomes in the MLR model.
Documentation included billable time (critical care, evaluation and management, procedures) and a new category ("zero charge time"), which facilitated record keeping of other patient-care activities.
As can be seen from Fig. 2, the median age at diagnosis fell as performance status worsened; from 84.5 years among those in category zero, through to 76.2 years among those in category four.
We partitioned the total days of paracetamol use into these categories and assigned each child a value for days of exposure for each category (zero if never given for any illness in that category).
