Table 2 Univariate analysis of HAI
Relevant factors | Infection group (n = 64) | Control group (n = 478) | t/z/χ2 | P |
|---|---|---|---|---|
Gender n (%) | ||||
Male | 31 (48.4) | 194 (40.6) | 1.433 | 0.231 |
Female | 33 (51.6) | 284 (59.4) | ||
Age n (%) | ||||
≤ 44 years old | 8 (12.5) | 79 (16.5) | 2.737 | 0.255 |
45–59 years old | 28 (43.8) | 239 (50) | ||
≥ 60 years old | 28 (43.8) | 160 (33.5) | ||
Admission Activities of daily living (ADL) M(Q) | 30 (0–64) | 95 (45–100) | −6.699 | 0.000 |
Admission route n (%) | ||||
Emergency | 47 (73.4) | 191 (40) | 25.687 | 0.000 |
Elective | 17 (26.6) | 287 (60) | ||
Hospitalization time M(Q) | 19 (15–24) | 8 (6–12) | −10.295 | 0.000 |
Mechanical ventilation n (%) | ||||
Yes | 48 (75) | 76(15.9) | 111.735 | 0.000 |
No | 16 (25) | 402(84.1) | ||
Hypertension n (%) | ||||
Yes | 23 (35.9) | 169 (35.4) | 0.008 | 0.927 |
No | 41 (64.1) | 309 (64.6) | ||
Diabetes n (%) | ||||
Yes | 9 (14.1) | 69 (14.4) | 0.006 | 0.936 |
No | 55 (85.9) | 409 (85.6) | ||
Coronary heart disease n (%) | ||||
Yes | 5 (7.8) | 19 (4) | 1.964 | 0.161 |
No | 59 (92.2) | 459 (96) | ||
Immune system disease n (%) | ||||
Yes | 1 (1.6) | 7 (1.5) | 0.004 | 0.952 |
No | 63 (98.4) | 471 (98.5) | ||
Steroids n (%) | ||||
Yes | 12 (18.8) | 115 (24.1) | 0.887 | 0.346 |
No | 52 (81.3) | 363 (75.9) | ||
Antiplatelet aggregate n (%) | ||||
Yes | 11 (17.2) | 221 (46.2) | 19.452 | 0.000 |
No | 53 (82.8) | 257 (53.8) | ||
Admission GCS score n (%) | ||||
≤ 8 points | 25 (39.1) | 19 (4) | 93.161 | 0.000 |
> 8 points | 39 (60.9) | 459 (96) | ||
Admission Hunt-Hess classification n (%) | ||||
≤ 2 points | 35 (54.7) | 435 (91) | 64.623 | 0.000 |
≥ 3 points | 29 (45.3) | 43 (9) | ||
Leukopenia n (%) | ||||
Yes | 2 (3.1) | 19 (4) | 0.109 | 0.741 |
No | 62 (96.9) | 459 (96) | ||
Albumin reduction n (%) | ||||
Yes | 14 (21.9) | 36 (7.5) | 13.867 | 0.000 |
No | 50 (78.1) | 442 (92.5) | ||
Hyperglycaemia n (%) | ||||
Yes | 45 (70.3) | 166 (34.7) | 30.062 | 0.000 |
No | 19 (29.7) | 312 (65.3) | ||
Abnormal liver function n (%) | ||||
Yes | 6 (9.4) | 43 (9) | 0.010 | 0.921 |
No | 58 (90.6) | 435 (91) | ||
Abnormal renal function n (%) | ||||
Yes | 3 (4.7) | 5 (1) | 2.947 | 0.086 |
No | 61 (95.3) | 473 (99) | ||
Hyperkalaemia n (%) | ||||
Yes | 1 (1.6) | 1 (0.2) | 0.335 | 0.562 |
No | 63 (98.4) | 477 (98.8) | ||
Hypokalaemia n (%) | ||||
Yes | 9 (14.1) | 54 (11.3) | 0.420 | 0.517 |
No | 55 (85.9) | 424 (88.7) | ||
Hypernatremia n (%) | ||||
Yes | 3 (4.7) | 14 (2.9) | 0.142 | 0.707 |
No | 61 (95.3) | 464 (97.1) | ||
Hyponatremia n (%) | ||||
Yes | 12 (18.8) | 26 (5.4) | 13.365 | 0.000 |
No | 52 (81.3) | 452 (94.6) | ||
Surgical approach n (%) | ||||
Intervention | 22 (34.4) | 320 (66.9) | 25.716 | 0.000 |
Craniotomy | 42 (65.6) | 158 (33.1) | ||
Surgery duration n (%) | ||||
≤ 4 h | 30 (46.9) | 365 (76.4) | 24.825 | 0.000 |
> 4 h | 34 (53.1) | 113 (23.6) | ||
Non-class I incision n (%) | ||||
Yes | 1 (1.6) | 2 (0.4) | 0.964 | 0.326 |
No | 63 (98.4) | 476 (99.6) | ||
Surgical level n (%) | ||||
Small | 0 | 1 (0.2) | 6.914 | 0.075 |
Medium | 1 (1.6) | 32 (6.7) | ||
Large | 4 (6.3) | 9 (1.9) | ||
Extra large | 59 (92.2) | 436 (91.2) | ||
Anaesthesia method n (%) | ||||
General anaesthesia | 64 (100) | 465 (97.3) | 0.811 | 0.368 |
Local anaesthesia | 0 | 13 (2.7) | ||
Intraoperative blood loss n (%) | ||||
< 1000 ml | 60 (93.8) | 473 (99) | 6.445 | 0.011 |
≥ 1000 ml | 4 (6.3) | 5 (1) | ||
Unexpected reoperation n (%) | ||||
Yes | 8 (12.5) | 8 (1.7) | 19.468 | 0.000 |
No | 56 (87.5) | 470 (98.3) | ||
Hypothermia treatment n (%) | ||||
Yes | 26 (40.6) | 11 (2.3) | 124.376 | 0.000 |
No | 38 (59.4) | 467 (97.7) | ||
Artificial airway n (%) | ||||
Yes | 64 (100) | 466 (97.5) | 0.688 | 0.407 |
No | 0 | 12 (2.5) | ||
Indwelling catheter n (%) | ||||
Yes | 64 (100) | 474 (99.2) | 1.009 | 0.315 |
No | 0 | 4 (0.8) | ||
Central venous catheter n (%) | ||||
Yes | 58 (90.6) | 119 (24.9) | 110.883 | 0.000 |
No | 6 (9.4) | 359 (75.1) | ||