Table 1 Characteristics of participants in the cohort, by preoperative length of stay (n = 600)
From: Effect of preoperative hospital stay on surgical site infection in Chinese cranial neurosurgery
Variable | Preoperative length of stay | |||
|---|---|---|---|---|
1–2 days | 3–4 days | 5–6 days | ≥ 7 days | |
Participants, n | 144 | 352 | 76 | 28 |
Mean Age(SD),y | 50.56(13.52) | 50.64(13.35) | 50.57(11.43) | 50.75(14.35) |
Female,% | 49.3 | 54.5 | 60.5 | 75.0 |
Mean BMI(SD),kg/m2 | 22.78(3.05) | 23.31(3.23) | 23.41(3.26) | 22.8(3.40) |
CCI,% | ||||
0 | 30.6 | 4.3 | 6.6 | 7.1 |
1 | 23.6 | 23.9 | 30.3 | 17.9 |
2 | 45.1 | 66.2 | 59.2 | 67.9 |
≥3 | 0.7 | 5.7 | 3.9 | 7.1 |
Type of surgery,% | ||||
tumor | 24.3 | 24.1 | 31.6 | 14.3 |
vascular | 47.1 | 73.6 | 65.8 | 85.7 |
others | 28.5 | 2.3 | 2.6 | 0.0 |
ASA,% | ||||
II | 17.4 | 1.1 | 2.6 | 7.1 |
III | 39.6 | 39.5 | 32.9 | 42.9 |
IV | 43.1 | 59.4 | 64.5 | 50.0 |
Laminar flow,% | ||||
cleanliness class 100 | 42.4 | 52.0 | 46.1 | 46.4 |
cleanliness class 10,000 | 57.6 | 48.0 | 53.9 | 53.6 |
Mean Surgical duration (SD),h | ||||
3.39(1.86) | 4.12(1.99) | 4.39(2.33) | 4.63(2.41) | |
Infratentorial,% | 9.0 | 11.9 | 21.1 | 17.9 |
Wound class,% | ||||
clean | 85.4 | 76.4 | 81.6 | 82.1 |
clean-contaminated | 14.6 | 23.6 | 18.4 | 17.9 |
Mean Ln Estimated blood loss (SD), ml | ||||
2.19(0.34) | 2.35(0.39) | 2.40(0.46) | 2.42(0.48) | |
Blood transfusion,% | 3.5 | 12.8 | 14.5 | 10.7 |
Implants,% | ||||
mental | 28.5 | 41.5 | 35.5 | 39.3 |
mixed | 71.5 | 58.5 | 64.5 | 60.7 |
Wound drainage,% | 54.2 | 73.9 | 76.3 | 75.0 |