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Table 4 Frequency of and risk difference for developing complications according to stroke severity on admission

From: Complications in the first week after stroke: a 10-year comparison

  2003 2013   
Stroke severity No. of patients One or more complications No. of patients One or more complications RD 95 % CI
   n %   n %   
Very severe 61 50 82.0 26 24 92.3 −0.10 −0.23 to 0.08
Severe 58 45 77.6 24 16 66.7 0.11 −0.09 to 0.33
Moderate 111 82 73.9 58 26 44.8 0.29 0.43 to 0.14
Mild 124 50 40.7 49 13 26.5 0.14 −0.02 to 0.27
Very mild 135 25 18.4 28 5 17.9 0.01 −0.18 to 0.13
p-value for trenda   <0.001    <0.001   
  1. Very severe: Scandinavian Stroke Scale (SSS) = 0–14, severe: SSS = 15–29, moderate: SSS = 30–44, mild: SSS = 54–51, very mild: SSS = 52–59
  2. RD risk difference
  3. aCochran-Armitage test for trend