Table 1

Risk factors among patients who had an adequate (minimum 17 hours recorded) ambulatory ECG suitable for heart rate variability calculation at baseline, excluding patients treated with digoxin or with left bundle branch block

No CV death or MI (n=588)CV death (n=27)p Value*Non-fatal MI (n=26)p Value†
*Comparison between patients suffering cardiovascular (CV) death and patients without CV death or myocardial infarction (MI). †Comparison between patients with a non-fatal MI and patients without CV death or MI. χ2 and Mann-Whitney tests.
Men (%)402 (68)25 (93)0.00822 (85)
Median age in years (interquartiles)60 (54;65)61 (58;66)64 (60;67)0.009
Current smokers (%)130 (21)10 (37)6 (23)
Former smokers (%)248 (42)7 (26)10 (38)
Hypertension (%)146 (25)14 (52)0.0028 (31)
MI (%)82 (15)10 (37)0.0016 (23)
Congestive heart failure (%)28 (5)4 (15)0.0223 (12)
Diabetes mellitus (%)43 (7)6 (22)0.0055 (23)0.027