Demographic characteristics of the three clusters and post hoc comparisons of pairs of clusters for each demographic variable are shown in Table 2. Pairs of clusters did not differ in any demographic variable except age and gender. Cluster 3 participants (mean age 38.3 years) were significantly older than participants in both the Type II/B (mean age 28.2 years, p<0.001) and Type I/A (mean age 26.8 years, p<0.001) clusters. The Type II/B and Type I/A clusters did not significantly differ on age. Both the Type I/A cluster (p<0.03) and the Type II/B (p<0.002)) differed in the proportion of women in the cluster based on the total number of women/men ascertained.
