2.8. Sensitivity analysis
In a sensitivity analysis, we conducted the above-mentioned analyses using as-treated assignments, comparing control facilities to ‘high’ intervention facilities and ‘low’ intervention facilities. In the as-treated analysis, facilities were designated as controls if they never had program interns and had admin interns for at least three-quarters of the study period (six months). Facilities were classified as ‘high’ intervention if they had both admin and program interns simultaneously placed for at least three-quarters of the study period. They were classified as a ‘low’ intervention if they had admin and program interns simultaneously placed, but for less than three-quarters of the study period. Facilities were excluded from the analysis if they did not meet one of these definitions. In a second sensitivity analysis, we re-ran the intention-to-treat and as-treated difference-in-difference and time series analyses for the outcome “% tested,” excluding the intervention facility that required imputed headcount data for a portion of the intervention period.