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Table 2 Procedural details, fluid balance, catecholamine therapy and perioperative hypotension

From: Preoperative routine measurement of NT-proBNP predicts postoperative morbidity after non-cardiac surgery with intermediate or high surgical risk: an observational study

Characteristics

Total

(n = 199)

NT-proBNP

≤ 450 pg/ml

(n = 129)

NT-proBNP

> 450 pg/ml

(n = 70)

p

Procedural details

 Duration of intervention [IQR] - min

115 [75–163]

119 [70–181]

105 [81–154]

0.37

 Duration of anaesthesia [IQR] - min

205 [152–284]

197 [149–294]

209 [155–270]

0.985

Fluid balance

 Perioperative fluid balance [IQR] - ml

950 [480–1280]

950 [480–1350]

960 [400–1220]

0.775

 Amount of colloids [IQR] - ml

0 [0–500]

0 [0–500]

0 [0–500]

0.919

 Amount of crystalloids [IQR] - ml

1132 [1000–1280]

1083 [1000–1656]

1227 [1000–1643]

0.675

 Amount of fluid by autotransfusion [IQR] - ml

0 [0–0]

0 [0–0]

0 [0–0]

0.175

 Amount of red blood cell concentrate [IQR] - ml

0 [0–0]

0 [0–0]

0 [0–0]

0.100

 Amount of fresh frozen plasma [IQR] - ml

0 [0–0]

0 [0–0]

0 [0–0]

0.345

 Blood loss [IQR] - ml

200 [50–400]

150 [50–400]

250 [50–500]

0.260

 Urinary output [IQR] - ml

350 [20–720]

300 [0–785]

445 [150–621]

0.182

Catecholamine therapy

 Cumulative amount of norepinephrine [IQR] - μg

178 [0–554]

83 [0–436]

261 [4–784]

0.007

 Cumulative amount of epinephrine [IQR] - μg

0 [0–0]

0 [0–0]

0 [0–0]

0.175

Perioperative Hypotension

 Incidence - no. (%)

176 (88.4)

114 (88.4)

62 (89.0)

0.966

 Absolute duration [IQR] - min

14.6 [3.8–28.3]

15.7 [3.3–29.2]

13.8 [5.8–27.6]

0.786

 Relative duration [IQR] - %

6.7 [1.9–13.5]

6.8 [1.9–13.6]

6.7 [2.1–12.2]

0.938

 AUC [IQR] – min × mmHg

60.7 [11.5–168.6]

58.8 [10.5–167.0]

62.9 [20.2–180.4]

0.655

 Relative AUC [IQR] – min × mmHg/%

25.5 [6.2–73.9]

24.4 [4.7–71.0]

28.2 [9.4–84.6]

0.624

  1. Hypotension was defined as mean arterial pressure < 65 mmHg. Abbreviations: AUC = area under the curve