Statistical Analysis Plan The data for aim 2, based on both baseline and follow-up data, can be summarized in a table with (k+1) rows and (k+1) columns. The total number of HASS is k (k=10 for this study). An extra dummy column and an extra dummy row are added to the table to incorporate scenarios where patients do not utilize any high value HASS or utilize HASS that are not deemed high value. Cells in the (k+1)th column represent frequencies of patients who are deemed to be appropriate for some HASS but do not use that service. Similarly, the (k+1)th row represent the cell frequencies corresponding to the patients who use some HASS not deemed high value. So the total number of HASS, for analysis purposes, becomes k+1. nij (i,j=1,2, … k+1) represents the cell frequency (number of patients) corresponding to ith normative HASS and jth actual service: number of patients who have been prescribed ith normative HASS and have used jth actual service. Diagonal elements in the table, nii represent frequencies corresponding to agreement between normative and actual utilization of HASS. Cohen's kappa value is used as the measure concordance between the actual utilization of different types of HASS versus normative HASS.