Cumulative risks and rate ratios of recurrent subdural haematoma (SDH) according to concomitant medical diseases and other potential predictors in Danish SDH patients diagnosed 1996–2011.

*95% Confidence interval** Adjusted for age, sex, calendar period, time since admittance -, and length of hospital stay for the primary SDH, as well as all the listed potential predictors for recurrent SDH.***Adjusted for the use of platelet inhibitors and warfarin.† Trauma diagnosis less than 2 years before the primary SDH.Ω PDMD: Pre-packaged Daily Medication Doses.Cumulative risks and rate ratios of recurrent subdural haematoma (SDH) according to concomitant medical diseases and other potential predictors in Danish SDH patients diagnosed 1996–2011.