Table 1 Baseline characteristics of geriatric patients with hip fracture
|  | Total(N = 1415) | Preoperative atrial fibrillation(N = 101) | No-preoperative atrial fibrillation(N = 1314) | p value |
|---|---|---|---|---|
Gender, N (%) | ||||
 Male | 405 (28.6%) | 35 (34.7%) | 370(28.2%) |  0.103 |
 Female | 1010 (71.4%) | 66 (65.3%) | 994(71.8%) | |
Age, mean ± SD (years) | 79.6 ± 7.5 | 82.3 ± 6.6 | 79.4 ± 7.5 |  < 0.001 |
Age group, N (%) | ||||
  < 80 years | 670 (47.3%) | 36(35.6%) | 634(48.2%) | 0.014 |
  ≥ 80 years | 745 (52.7%) | 65(64.4%) | 680(51.8%) | |
Mechanism of injury, N (%) | ||||
 Low energy | 1375 (97.2%) | 99 (98.0%) | 1276 (97.1%) | 0.825 |
 High energy | 40 (2.8%) | 2(2.0%) | 38(2.9%) | |
Fracture types, N (%) | ||||
 Femoral neck fractures | 642 (45.4%) | 40 (39.6%) | 602 (45.8%) | 0.227 |
 Intertrochanteric fractures | 773 (54.6%) | 61 (60.4%) | 712 (54.2%) | |
Comorbidities, N (%) | ||||
 Hypertension | ||||
  Yes | 659 (46.6%) | 61 (60.4%) | 598 (45.5%) | 0.004 |
  No | 756(53.4%) | 40(39.6%) | 716 (54.5%) | |
 Coronary heart disease | ||||
  Yes | 402 (28.4%) | 49 (48.5%) | 363 (26.9%) |  < 0.001 |
  No | 1013 (71.6%) | 52 (51.5%) | 961 (73.1%) | |
 Diabetes | ||||
  Yes | 295 (20.8%) | 26 (25.7%) | 269 (20.5%) | 0.209 |
  No | 1120 (79.2%) | 75 (74.3%) | 1045 (79.5%) | |
 Cerebrovascular disease | ||||
  Yes | 580 (41.0%) | 52 (51.5%) | 528 (40.2%) | 0.026 |
  No | 835(59.0%) | 49 (48.5%) | 786 (59.8%) | |
ACCI | 4.0(1.0) | 5.3 ± 1.3 | 4.3 ± 1.3 |  < 0.001 |
Hematological and biochemical indices at admission | ||||
 CRP | 27.7(43.6) | 49.6(57.6) | 26.9(40.8) |  < 0.001 |
 HB | 113.2 ± 16.4 | 110.2 ± 14.3 | 113.5 ± 16.7 | 0.063 |
 ALB | 36.8 ± 4.5 | 37.2 ± 4.3 | 36.7 ± 4.5 | 0.346 |
 SIRI | 3.1(3.5) | 5.6(2.0) | 3.0(3.3) |  < 0.001 |
Echocardiographic parameter | ||||
 Left atrial size | 33.0 ± 4.6 | 32.5 ± 4.8 | 33.0 ± 4.6 | 0.298 |