E N D
Supplemental Data Figure 1 Impact of ‘run-in’ period on overall prevalence of tests requested a) ‘too soon’ and b) ‘too late’. Data on whether requests were ‘too soon’ or ‘too late’ were based on the date of the previous request. As the period covered in the search for this previous request increases, the estimate of prevalence of tests requested ‘too soon’ is relatively constant, while that for those requested ‘too late’ increases to a plateau. The impact of using a 2-year run-in on the latter period is highlighted with the hashed line in b).
Supplemental Data Figure 1B Estimate based on 2 year ‘run-in’ period