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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