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Risk (left graph) and incident rate ratios (right graph) for any health care encounter in the 12 months following therapy initiation: evaluation of TIO and IPR (with reference to FSC) using two analysis methods.
Abbreviations: ED, emergency department; FSC, fluticasone propionate/salmeterol combination; IPR, ipratropium; OCS, oral corticosteroids; Outpt, outpatient; TIO, tiotropium.
