9) Beside the comparison of means, the MAST score was transformed into a categoric variable.
The chi-square and Fisher's exact tests were used to explore the differences in categoric variables among the groups.
We controlled for it by including it in the model as a categoric variable, since the association was not a linear one.
dagger]) Overall p value for the categoric variable.
Teaching status was indicated by membership in the Council of Teaching Hospitals and was a bivariate categoric variable
Race/ethnicity constitutes a categoric variable representing the racial or Hispanic ethnicity of the respondent: Hispanic/Latino, black/African American, Asian/Pacific Islander, Native American/Alaskan native, white, other race/ethnicity, or missing race/ethnicity.
Parent's age is a categoric variable consisting of three categories: 18-34, 35-54, 55 or older.
Oil shocks provide another set of categoric variables
, with inputs of a series of zeros except for ones in 1974 and 1975, 1979 and 1980--the main years for economic impacts from shortages and price increases in energy (see Baily, 1981, and Fischer, 1996, for effects of fuel inflation on business and on society).
Once all the variables had been added, categoric variables
with a Wald [chi square] probability of greater than 0.
Proportions for categoric variables
were compared by using the [chi square] test for independence.
Logistic regression model for low BMD (z-score < -1) including blood cadmium and smoking as categoric variables
and weight as a continuous variable, for the subgroup older than 60 years.
All three types of SLEV transmission (transmission incidence, transmission number, and epidemic transmission) were defined as categoric variables