Cluster membership is unrelated to demographic variables
To determine any association between cluster membership and demographic variables (age, sex, race, education, income, work and marital status), we conducted a chi-square analysis on categorical variables, and a one-way ANOVAs with CLUSTER as a between-subject factor was conducted on age. No significant association between cluster membership and sex, race, education, income, work nor marital status were found (ps ≥ 0.342). Similarly, no significant difference between cluster membership and age was observed (F(2,60) = 1.86, 