Table 2 Active and previous comorbidities as stated in the hospital medical records

Chronic ischaemic heart disease, %

24

34

0.007^{b, d}

Myocardial infarction^a_, %

22

24

0.535^{b, d}

Congestive heart failure^a, %

26

33

0.033^b

Peripheral vascular disease^a, %

7.8

9.2

0.503^b

CVA^a or TIA^a, %

29

27

0.507^b

Dementia^a, %

13

17

0.141^{b, d}

Chronic obstructive pulmonary disease^a, %

13

26

< 0.001^b

Connective tissue disease^a_, %

22

20

0.463^b

Peptic ulcer disease^a, %

16

23

0.038^b

Mild liver disease^a, %

0.6

2.2

0.063^{c, e}

Severe liver disease^a, %

0.0

1.1

0.124^c

Diabetes mellitus^a, %

17

21

0.130^b

Hemiplegia^a, %

2.5

1.9

0.613^c

Kidney failure stadium IV^a, %

4.5

14

< 0.001^{b, e}

History of cancer, %

31

44

< 0.001^b

Solid tumour^a, %

14

26

< 0.001^b

Metastatic tumour^a, %

3.9

14

< 0.001^b

Leukaemia^a, %

1.9

1.9

1.000^c

Lymphoma^a, %

0.8

3.3

0.019^c

AIDS^a, %

–

–

–

Leg ulcer, %

3.3

7.5

0.014^b

Atrial fibrillation, %

28

37

0.011^b

History of embolic disease, %

8.3

14

0.013^b