Cluster membership is associated with demographic variables
To determine whether cluster membership was associated with demographic variables (age, sex, income, education, living area), we conducted chi-square analyses with categorical variables and one-way ANOVAs with the continuous variable of age. These revealed a significant association between cluster membership and sex (Pearson chi-square(2) = 365.6, p < 0.001), with the largest proportion of females within cluster 1 (83%), followed by cluster 3 (70%) and 2 (67%).We found a similar pattern of results for other demographic variables (see Table 