Fig 1.
Flowchart for the cohort selection.
Table 1.
Number of frequent users each year and relative to the first year.
Prevalence for persistent frequent use is in italic.
Fig 2.
Percentages of non-frequent (gray), occasional frequent (blue), and persistent frequent (orange) users relative to a) the number of ED visits (three bottom rows) and b) the number of ED users (three top rows) for each year of follow-up (Y1, Y2 and Y3).
Table 2.
Odds ratios (99.9% confidence interval) and model fit criteria from multiple logistic regression for occasional frequent users and persistent frequent users, based on the validation sample (n = 146,973).
Table 3.
Descriptive statistics for the cohort, users other than persistent frequent users, occasional frequent users, and persistent frequent users.