Table 3 Relationship between dichotomised variables, based on measurements of initial electrocardiography and 'arrhythmia'

64

51

1.68 (0.80–3.52)

1.44 (0.65–3.18)^a

82

76

1.47 (0.57–3.79)

0.87 (0.31–2.47)^b

28

9

3.56 (1.46–8.68)

2.02 (0.66–6.17)^b

13

2

14 (1.52–129)

5.42 (0.50–59)^b

38

35

1.17 (0.54–2.51)

0.57 (0.23–1.43)^a

74

50

3.07 (1.33–7.07)

1.48 (0.57–3.87)^a

56

29

33 (3.17–921)^c

13.0 (1.64–102)^a

28

3

16 (3.47–74)

8.88 (1.73–45)^a

79

62

2.67 (1.03–6.91)

1.50 (0.56–4.00)^a