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Table 3 ASA—American Society of Anesthesiologists physical status, POSSUM—Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity

From: Blood volume in patients likely to be preload responsive: a post hoc analysis of a randomized controlled trial

 

All

Preload responders

Preload non-responders

Difference

p

Age, yrs

68 (58–74)

67 (59–73)

69 (59–74)

0 (− 5 to 4)

0.96

Female gender, % (no.)

60 (38/63)

46 (24/43)

70 (14/20)

N/A

0.28

Weight, kg

73 (62–86)

73 (63–86)

74 (61–85)

− 1.5 (− 9.0 to 8.0)

0.75

Height, cm

169 (164–176)

170 (165–177)

165 (162–174)

− 3.2 (− 8.0 to 1.7)

0.19

POSSUM physiology score

15 (13–17)

15 (9)

15 (11)

N/A

0.68

ASA

2 (2–3)

2 (2)

2 (1)

N/A

0.11

Perioperative bleeding, ml

600 (300–1000)

600 (300–1000)

500 (225–975)

− 50 (− 200 to 300)

0.61

Perioperative diuresis, ml/kg/h

0.7 (0.4–1.1)

0.7 (0.4–1.1)

0.4 (0.3–1.0)

0.2 (− 0.4 to 0.0)

0.12

Perioperative crystalloids, ml

4400 (4000–5250)

4350 (4000–5250)

4400 (3960–5440)

− 105 (− 861 to 650)

0.90

Perioperative colloid, ml

600 (425–1000)

750 (250–1000)

500 (500–1000)

− 56 (− 326 to 212)

0.68

Length of surgery, min

404 (329–497)

600 (300–1000)

399 (281–478)

− 32 (− 94 to 29)

0.29

Length of anesthesia, min

503 (448–585)

513 (454–592)

499 (360–562)

− 27 (− 90 to 33)

0.36

Epidural anesthesia, % (no.)

92 (58/63)

91(39/43)

95(19/20)

N/A

0.56

Perioperative use of vasopressor, % (no.)

84 (53/63)

86 (37/43)

80 (16/20)

N/A

0.54

Perioperative use of inotropy, % (no.)

14 (9/63)

14 (6/43)

15 (3/20)

N/A

0.91

  1. Data are presented as median (IQR), percentage (no.), mean difference (95% CI) or median difference (95% CI) according to the Hodges-Lehmann method. Comparisons between preload responders and preload non-responders were performed using the Mann–Whitney, Student’s t-test or Fisher’s exact test as appropriate. No adjustments for multiple comparisons were made