Table 1.
Characteristics of subjects with and without atrial fibrillation after coronary artery bypass graft surgery
| Characteristic | No fibrillation (n= 482) |
Fibrillation (n =238) |
P |
|---|---|---|---|
| Age, mean (SD), years | 63.9 (10.1) | 69.5 (7.5) | <.001 |
| Male sex | 67.2 | 69.6 | .05 |
| White race | 92.5 | 92.0 | .68 |
| Body surface area, mean (SD), m2 |
1.95 (0.23)* | 1.96 (0.21)† | .62 |
| Atlas score | .001 | ||
| 0 = no risk | 1.0 | 0.4 | |
| 1 = minimal risk | 75.0 | 63.9 | |
| 2 = moderate risk | 22.4 | 32.8 | |
| 3 = severe risk | 1.7 | 3.0 | |
| 4 = maximal risk | 0 | 0 | |
| Past medical problems defined by ICD-9-CM code |
|||
| Diabetes | 27 | 31.9 | .17 |
| Old myocardial infarction | 29.5 | 29.0 | .90 |
| Heart failure | 9.5 | 9.2 | .90 |
| Chronic obstructive pulmonary disease |
10.2 | 10.9 | .75 |
| No. of vessels bypassed | .014 | ||
| 1 | 3.7 | 0 | |
| 2 | 11.6 | 10.1 | |
| 3 | 33.0 | 31.5 | |
| 4 | 38.6 | 39.9 | |
| 5 or more | 13.1 | 18.5 |
Other than P values, numbers in table are percentages of patients with that characteristic in each group, unless otherwise indicated. Because of rounding, percentages for Atlas scores do not total 100. ICD-9-CM indicates International Classification of Diseases, Ninth Revision, Clinical Modification.
*
n=235.
†
n=479.