Table 1. Demographics and medication histories according to type of surgery in elderly patients with femoral neck fracture.
| Variables | Younger elderly group (65–79 years old, n = 3,228) | Older elderly group (80–99 years old, n = 2,994) | ||||||
|---|---|---|---|---|---|---|---|---|
| Hemiarthroplasty | Total hip arthroplasty | P value | Hemiarthroplasty | Total hip arthroplasty | P value | |||
| Number | 3,015 (93.4) | 213 (6.6) | 2,898 (96.8) | 96 (3.2) | ||||
| Age group, yr | 0.002 | 0.055 | ||||||
| 65–69 | 318 (10.5) | 37 (17.4) | 0 | 0 | ||||
| 70–79 | 2,697 (89.5) | 176 (82.6) | 0 | 0 | ||||
| 80–89 | 0 | 0 | 2,487 (85.8) | 89 (92.7) | ||||
| ≥ 90 | 0 | 0 | 411 (14.2) | 7 (7.3) | ||||
| Sex | 0.081 | 0.296 | ||||||
| Male | 824 (27.3) | 70 (32.9) | 597 (20.6) | 24 (25.0) | ||||
| Female | 2,191 (72.7) | 143 (67.1) | 2,301 (79.4) | 72 (75.0) | ||||
| Income | 0.020 | 0.554 | ||||||
| Low | 493 (16.4) | 19 (8.9) | 477 (16.5) | 13 (13.5) | ||||
| Mid-low | 520 (17.2) | 41 (19.2) | 535 (18.5) | 23 (24.0) | ||||
| Mid-high | 699 (23.2) | 46 (21.6) | 638 (22.0) | 20 (20.8) | ||||
| High | 1,303 (43.2) | 107 (50.2) | 1,248 (43.1) | 40 (41.7) | ||||
| Charlson comorbidity score | 0.157 | 0.608 | ||||||
| 0 | 557 (18.5) | 43 (20.2) | 757 (26.1) | 22 (22.9) | ||||
| 1–2 | 1,251 (41.5) | 101 (47.4) | 1,335 (46.1) | 50 (52.1) | ||||
| 3–6 | 946 (31.4) | 52 (24.4) | 698 (24.1) | 22 (22.9) | ||||
| ≥ 6 | 261 (8.7) | 17 (8.0) | 108 (3.7) | 2 (2.1) | ||||
| Disability | 62 (2.1) | 4 (1.9) | 0.859 | 101 (3.5) | 1 (1.0) | 0.194 | ||
| Anesthesia | < 0.001 | 0.007 | ||||||
| General | 727 (24.1) | 90 (42.3) | 691 (23.8) | 36 (37.5) | ||||
| Spinal | 2,107 (69.9) | 107 (50.2) | 2,044 (70.5) | 57 (59.4) | ||||
| Unknown | 181 (6.0) | 16 (7.5) | 163 (5.6) | 3 (3.1) | ||||
| Hospital beds | < 0.001 | < 0.001 | ||||||
| < 200 | 663 (22.0) | 78 (36.6) | 583 (20.1) | 30 (31.3) | ||||
| 200–499 | 517 (17.1) | 64 (30.0) | 488 (16.8) | 33 (34.4) | ||||
| 500–799 | 1,065 (35.3) | 41 (19.2) | 1,124 (38.8) | 15 (15.6) | ||||
| ≥ 800 | 770 (25.5) | 30 (14.1) | 703 (24.3) | 18 (18.8) | ||||
| Calendar year | 0.056 | 0.732 | ||||||
| 2006–2007 | 572 (19.0) | 27 (12.7) | 392 (13.5) | 10 (10.4) | ||||
| 2008–2009 | 595 (19.7) | 48 (22.5) | 480 (16.6) | 15 (15.6) | ||||
| 2010–2011 | 670 (22.2) | 61 (28.6) | 606 (20.9) | 23 (24.0) | ||||
| 2012–2013 | 623 (20.7) | 39 (18.3) | 688 (23.7) | 20 (20.8) | ||||
| 2014–2015 | 555 (18.4) | 38 (17.8) | 732 (25.3) | 28 (29.2) | ||||
| Past medication history | ||||||||
| Antidepressant | 1,262 (41.9) | 81 (38.0) | 0.273 | 928 (32.0) | 38 (39.6) | 0.119 | ||
| Benzodiazepine | 2,276 (75.5) | 145 (68.1) | 0.016 | 1,912 (66.0) | 61 (63.5) | 0.621 | ||
| Anti-diabetic agent | 974 (32.3) | 68 (31.9) | 0.013 | 578 (19.9) | 21 (21.9) | 0.642 | ||
| Anti-hypertensive agent | 2,254 (74.8) | 143 (67.1) | 0.014 | 2,099 (72.4) | 79 (82.3) | 0.033 | ||
| Lipid lowering agent | 937 (31.1) | 64 (30.0) | 0.753 | 599 (20.7) | 27 (28.1) | 0.077 | ||
| NSAID | 2,663 (88.3) | 189 (88.7) | 0.858 | 2,446 (84.4) | 85 (88.5) | 0.270 | ||
| COX-2 inhibitor | 572 (19.0) | 41 (19.2) | 0.921 | 495 (17.1) | 19 (19.8) | 0.488 | ||
| Steroid | 2,171 (72.0) | 165 (77.5) | 0.085 | 1,867 (64.4) | 63 (65.6) | 0.809 | ||
| Antiplatelet agent | 1,580 (52.4) | 99 (46.5) | 0.094 | 1,403 (48.4) | 51 (53.1) | 0.363 | ||
| Anti-dementia agent | 423 (14.0) | 20 (9.4) | 0.057 | 536 (18.5) | 19 (19.8) | 0.748 | ||
| Anti-parkinson agent | 325 (10.8) | 11 (5.2) | 0.010 | 189 (6.5) | 7 (7.3) | 0.764 | ||
| Anti-epilepsy agent | 491 (16.3) | 28 (13.1) | 0.228 | 317 (10.9) | 13 (13.5) | 0.423 | ||
| Anti-psychosis agenta | 449 (14.9) | 22 (10.3) | 0.068 | 402 (13.9) | 11 (11.5) | 0.500 | ||
| Opioid | 2,648 (87.8) | 193 (90.6) | 0.227 | 2,451 (84.6) | 79 (82.3) | 0.543 | ||
| Warfarin | 90 (3.0) | 6 (2.8) | 0.020 | 60 (2.1) | 1 (1.0) | 0.483 | ||
Values are presented as number of patients (%). Bold-faced P values indicate statistically significance.
NSAIDs = non-steroidal anti-inflammatory drugs.
aTotal number of lithium users was only 6. So, they were included in antipsychotics.