Table 1.
Baseline characteristics of patients included in the Detecting and Diagnosing Atrial Fibrillation (D2AF) study
| Usual care | Intention to screen | ||||
|---|---|---|---|---|---|
| Total | Screened | Not screened | P value* | ||
| No | 9526 | 9218 | 4106 | 5112 | — |
| Age (mean (SD)) | 75.0 (6.9) | 75.2 (6.8) | 73.5 (5.5) | 76.6 (7.3) | <0.001† |
| Women (No (%)) | 5177 (54.3) | 5071 (55.0) | 2196 (53.5) | 2875 (56.2) | 0.008‡ |
| Hypertension (No (%)) | 4579 (48.7) | 4540 (49.6) | 2098 (51.2) | 2442 (48.3) | 0.006‡ |
| Stroke or transient ischaemic attack (No (%)) | 911 (9.7) | 886 (9.7) | 315 (7.7) | 571 (11.3) | <0.001‡ |
| Diabetes (No (%)) | 1750 (18.6) | 1768 (19.3) | 732 (17.9) | 1036 (20.5) | 0.002‡ |
| Heart failure (No (%)) | 362 (3.9) | 348 (3.8) | 75 (1.8) | 273 (5.4) | <0.001‡ |
| Thromboembolism (No (%)) | 431 (4.6) | 460 (5.0) | 191 (4.7) | 269 (5.3) | 0.15‡ |
SD=standard deviation.
International Classification of Primary Care codes were used: for hypertension K86 or K87, or both; for stroke K90; for transient ischaemic attack K89; for diabetes T90; for heart failure K77; and for thromboembolism K93 or K94, or both.
For intention to screen and usual care, 62 patients (0.7%) and 127 (1.3%) had missing values for all comorbidities.
*
Screened versus not screened in the intention-to-screen group.
†
Independent sample t test.
‡
Pearson χ2 test.