Overview of pooled AF detection rates
| Subgroup | No of studies | No of patients | Pooled AF detection rate (95% CI) | Heterogeneity | ||
| Cases | Total | I2 (%) | P value | |||
| ILR monitoring | 23 | 701 | 2870 | 24.5% (20.0% to 29.6%) | 81.4 | <0.0001 |
| Duration of monitoring | ||||||
| 1 month | 3 | 31 | 647 | 4.9% (3.0% to 7.9%) | 0.0 | 0.65 |
| 3 months | 1 | 6 | 88 | 6.8% (3.0% to 14.4%) | – | – |
| 6 months | 5 | 71 | 498 | 15.7% (7.7% to 29.3%) | 81.3 | <0.0001 |
| 12 months | 12 | 267 | 1475 | 18.0% (14.0% to 22.7%) | 64.9 | <0.0001 |
| 18 months | 3 | 56 | 296 | 19.0% (13.7% to 25.8%) | 0.0 | 0.69 |
| 24 months | 7 | 285 | 1238 | 22.3% (18.9% to 26.1%) | 36.0 | 0.15 |
| 30 months | 3 | 81 | 211 | 39.4% (7.8% to 83.3%) | 90.2 | <0.0001 |
| 36 months | 3 | 118 | 317 | 0.3% (0.1% to 0.7%) | 66.2 | 0.052 |
| AF cut-off | ||||||
| 30 s | 8 | 181 | 867 | 20.8% (17.4% to 24.6%) | 23.4 | 0.24 |
| 60 s | 1 | 38 | 65 | 58.5% (46.2% to 69.7%) | – | – |
| 120 s | 13 | 457 | 1884 | 24.0% (18.3% to 30.7%) | 79.1 | <0.0001 |
| 300 s | 1 | 25 | 54 | 46.3% (33.6% to 59.5%) | – | – |
| Time of device implant from stroke/TIA | ||||||
| <7 days | 2 | 105 | 408 | 36.6% (0.0% to 100%) | 97.3 | <0.0001 |
| <28 days | 4 | 109 | 411 | 24.5% (11.4% to 45%) | 85.4 | <0.0001 |
| >28 days | 11 | 281 | 1219 | 22.5% (15.9% to 31%) | 79.4 | <0.0001 |
| MCOT monitoring | 19 | 262 | 2094 | 11.2% (8.2% to 15.1%) | 72.3 | <0.0001 |
| Duration of monitoring | ||||||
| <2 days | 1 | 4 | 72 | 5.6% (2.1% to 13.9%) | – | – |
| <14 days | 7 | 58 | 640 | 9.4% (5.7% to 15.2%) | 54.4 | 0.040 |
| <28 days | 14 | 228 | 1621 | 12.8% (8.9% to 17.9%) | 70.6 | <0.0001 |
| AF cut-off | ||||||
| 30 s | 19 | 218 | 1834 | 10.5% (7.4% to 14.6%) | 71.6 | <0.0001 |
| 60 s | 1 | 12 | 114 | 10.5% (6.1% to 17.6%) | – | – |
| 120 s | 1 | 32 | 146 | 21.9% (16.0% to 29.4%) | – | – |
| Time of device use from stroke/TIA | ||||||
| <7 days | 4 | 68 | 419 | 14.9% (6.5% to 30.8%) | 73.4 | 0.010 |
| <28 days | 4 | 22 | 343 | 7.0% (2.4% to 18.3%) | 37.5 | 0.19 |
| >28 days | 5 | 65 | 540 | 10.9% (6.2% to 18.5%) | 42.9 | 0.14 |
| Device type | ||||||
| Wireless recorder | 9 | 116 | 996 | 11.2% (8.1% to 15.3%) | 43.2 | 0.079 |
| Patch | 3 | 19 | 221 | 9.1% (3.3% to 22.6%) | 6.4 | 0.34 |
| Chest belt | 5 | 111 | 670 | 15.5% (7.0% to 30.9%) | 81.9 | 0.0002 |
| Handheld device | 3 | 31 | 272 | 8.6% (0.3% to 74.5%) | 82.4 | 0.0034 |
| Inpatient monitoring | 7 | 175 | 1484 | 12.6% (7.3% to 21.0%) | 89.2 | <0.0001 |
AF, atrial fibrillation; ILR, implantable loop recorder; MCOT, mobile cardiac outpatient telemetry; TIA, transient ischaemic attack.