From: Prescription Sequence Symmetry Analysis (PSSA) to assess prescribing cascades: a step-by-step guide
Study population | Patients using index before marker | Patients using marker before index | cSR | SRnull | aSR (95% CI) | |
---|---|---|---|---|---|---|
Primary analysisa | 20,313 | 15,121 | 5,192 | 2.91 | 1.13 | 2.59 (2.56-2.62) |
Washout window 6 months | 29,809 | 22,357 | 7,452 | 3.00 | 1.10 | 2.73 (2.70-2.76) |
Exposure window 6 months | 16,382 | 10,699 | 5,683 | 1.88 | 1.04 | 1.80 (1.77-1.83) |
CEI 6 months | 22,256 | 15,469 | 6,787 | 2.28 | 1.10 | 2.07 (2.04-2.10) |
No blackout periodb | 20,959 | 15,478 | 5,481 | 2.82 | 1.12 | 2.52 (2.49-2.55) |