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Table 1 Baseline characteristics of the cohort

From: Association of common genetic variants related to atrial fibrillation and the risk of ventricular fibrillation in the setting of first ST-elevation myocardial infarction

Variables

Cases (n = 257)

Controls (n = 537)

P value

Female sex, No. (%)

35 (14)

131 (25)

0.001

Median Age at index infarction, y (IQR)

60 (53–68)

61 (52–66)

0.100

Cardiovascular risk profile

Body mass index (kg/m2), (IQR)

27.2 (25–29)

26.7 (24–29)

0.400

Smoking (pack year), (IQR)

25 (5–41)

25 (6–42)

0.200

Smoking, No. (%)

 Never

38 (16)

108 (20)

0.300

 Past

69 (28)

133 (25)

 Current

136 (56)

290 (55)

Alcohol per week, (unit*, IQR)

6 (1–15)

3 (0–9)

<0.001

Alcohol units per week (categorized), No. (%)

 Non-drinkers

46 (19)

143 (27)

<0.001

 Normal (1–7)

90 (38)

242 (46)

 Moderate High (8–14)

41 (17)

70 (13)

 High (>15)

60 (26)

73 (14)

Diabetes, No. (%)

30 (12)

47 (9)

0.200

Hypertension, No. (%)

102 (41)

184 (35)

0.070

COPD, No. (%)

12 (5)

30 (6)

0.700

Hypercholesterolemia, No. (%)

97 (39)

165 (31)

0.023

Stroke, No. (%)

18 (7)

26 (5)

0.200

Atrial fibrillation, No. (%)

16 (7)

10 (2)

0.006

Depression, No. (%)

28 (11)

65 (12)

0.700

Epilepsy, No. (%)

4 (2)

5 (1)

0.500

Family History, No. (%)

 Sudden death

94 (40%)

128 (25%)

<0.001

 Myocardial infarction

90 (40%)

195 (38%)

0.600

 Stroke

36 (16%)

75 (15%)

0.600

Medication before MI¶, No. (%)

β-blockers

20 (8)

43 (8)

0.900

Statins

55 (22)

65 (12)

<0.001

ACE/ARB blockers

50 (21)

90 (17)

0.200

Aspirin

28 (12)

40 (8)

0.060

  1. IQR: interquartile range; unit‡ of alcohol =12 g (1 drink); COPD: chronic obstructive pulmonary disease; MI: myocardial infarction; ACE/ARB: angiotensin-converting-enzyme inhibitor/ angiotensin II receptor blocker