Table 2

Estimated effects (IRR) of the intervention variable in the unadjusted and seasonality adjusted ITS level change models

Intervention (level change)
UnadjustedSeasonality adjusted
IRR95% CIP valueIRR95% CIP value
Measure 10.830.731 to 0.958<0.010**0.830.712 to 0.963<0.014*
Measure 20.740.555 to 0.993<0.045*0.750.550 to 1.025<0.071
Measure 30.940.618 to 1.417<0.7550.930.597 to 1.449<0.749
Measure 40.930.569 to 1.502<0.7510.920.520 to 1.621<0.769
  • Measure 1: admission with stroke as primary diagnosis

  • Measure 2: admission with stroke as primary diagnosis and AF as secondary diagnosis

  • Measure 3: admission with bleeding as primary diagnosis and AF in any position of diagnosis.

  • Measure 4: admission with bleeding as primary diagnosis and use of OAC as secondary diagnosis

  • *P<0.05, **p<0.01

  • AF, atrial fibrillation; IRR, incidence rate ratio; ITS, interrupted time series; OAC, oral anticoagulation.