Explanatory Mean or Standard Coding Variable name
Variable proportion deviation Scheme in analysis
Veteran status (proportion) 0.19 – 1 = veteran, 0 = nonveteran Vet
Age (mean) 75.79 6.59 Actual number of years from birth Age_70
Female (proportion) 0.67 – 1 = yes, 0 = no Female_cnd
Education (mean) 11.11 3.55 Actual years attending school Educ_cnd
Currently married (proportion) 0.55 – 1 = yes, 0 = no Married_cnd
Note: In the analysis, age_70=(actual age–70); the rest of the covariates, except vet, are mean-centered variables.
Table 1: Mean or proportion, standard deviation, coding scheme of covariates: Older Americans (n=2,000).