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. Author manuscript; available in PMC: 2024 Jun 7.
Published in final edited form as: Contemp Clin Trials. 2023 Apr 23;129:107204. doi: 10.1016/j.cct.2023.107204

Table 1.

Stepped wedge design of RI-AIR.

 
 School Allocation Year of Implementation
Year 1 Year 2 Year 3 Year 4 Year 5
Cohort 1 5 School-based polygons Baseline 0 Active Trial Follow-Up
Cohort 2 8 School-based polygons Baseline-1 Baseline 0 Active Trial Follow-Up
Cohort 3 13 School-based polygons Baseline-2 Baseline-1 Baseline 0 Active Trial Follow-Up
Cohort 4 6 School-based polygons Baseline-3 Baseline-2 Baseline-1 Baseline 0 Active Trial

Note. This table illustrates the study’s Stepped Wedge Design (SWD). Using geospatial mapping, 32 school-based polygons with the highest levels of urgent asthma healthcare utilization in the Greater Providence area were identified, based on hospital data including asthma-related ED/inpatient visit rates. The SWD utilizes cluster-based randomization, which in this study was conducted on the community-level based on these school-based polygons.