Table 1.
Smoking and Health History of Study Participants According to Availability of ECG Examination at Baseline and at Both Baseline and Follow-Up Examinations.
| Smoking and medical history | Total sample | ECG examination at baseline | ECG examinations at both baseline and 6-year follow-up | ||||
|---|---|---|---|---|---|---|---|
| (n = 8462) n (%) | No (n = 1,558) n (%) |
Yes (n = 6,904) n (%) |
p | No (n = 3,485) n (%) |
Yes (n = 3,419) n (%) |
p | |
| Current/former smoker | 4,155 (49.1) | 572 (36.7) | 3,507 (50.8) | .050 | 1,575 (45.2) | 1,877 (54.9) | .000 |
| Diabetes | 668 (7.9) | 170 (10.9) | 497 (7.2) | .315 | 335 (9.6) | 205 (6.0) | .008 |
| Stroke/TIA | 711 (8.4) | 245 (15.7) | 4,695 (6.8) | .000 | 390 (11.2) | 154 (4.5) | .000 |
| Vascular disease | 2,902 (34.3) | 673 (43.2) | 2,223 (32.2) | .836 | 1,384 (39.7) | 981 (28.7) | .000 |
| Congestive heart failure | 465 (5.5) | 122 (7.8) | 345 (5.0) | .000 | 275 (7.9) | 68 (2.0) | .000 |
| Hypertension | 2,395 (28.3) | 478 (30.7) | 1,919 (27.8) | .314 | 1,140 (32.7) | 834 (24.4) | .000 |
Note. ECG = electrocardiography; TIA = transient ischemic attack.