All patients | Paced | 90 | 69.6 | 76.3 (4.5) | | | 0.0014* |
| Unpaced | 57 | 68.8 | 53.5 (6.7) | | | |
Age cohort 20–44 | Paced | 5 | 34.0 | 100 (0.0) | | | 1.00 |
| Unpaced | 10 | 32.6 | 100 (0.0) | | | |
Age cohort 45–64 | Paced | 18 | 57.1 | 94.4 (5.4) | | | 0.001* |
| Unpaced | 7 | 58.1 | 57.1 (18.7) | | | |
Age cohort 65–79 | Paced | 52 | 72.9 | 76.6 (5.9) | | | 0.003* |
| Unpaced | 18 | 72.2 | 50.0 (11.8) | | | |
Age cohort ⩾80 | Paced | 15 | 85.0 | 45.9 (13.0) | | | 0.76* |
| Unpaced | 22 | 85.9 | 33.4 (10.3) | | | |
Class 3 (no bradycardia) | Paced | 39 | 67.5 | 87.2 (5.4) | | | 0.020* |
| Unpaced | 47 | 67.8 | 54.4 (7.3) | | | |
Other groups
|
Organic heart disease | Paced | 38 | 69.8 | 68.2 (7.6) | 0.36 | 0.20 to 0.68 | 0.0014†‡ |
| Unpaced | 26 | 73.2 | 44.0 (9.9) | | | |
Mobitz I on ambulatory ECG only | Paced | 27 | 65.0 | 80.3 (7.9) | 0.23 | 0.05 to 1.01 | 0.051† |
| Unpaced | 8 | 51.8 | 62.5 (17.1) | | | |
Bundle branch block | Paced | 26 | 71.7 | 72.7 (8.8) | 0.34 | 0.14 to 0.80 | 0.024† |
| Unpaced | 14 | 70.0 | 23.1 (11.7) | | | |
No bundle branch block | Paced | 64 | 68.8 | 77.8 (5.2) | 0.54 | 0.03 to 0.89 | 0.023† |
| Unpaced | 43 | 66.1 | 62.7 (7.4) | | | |
PP intervals varies <60 ms | Paced | 46 | 72.4 | 80.1 (5.9) | 0.44 | 0.25 to 0.77 | 0.004† |
| Unpaced | 35 | 75.3 | 47.2 (8.6) | | | |