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Table 3 Spirometry data

From: The effect of goal-directed crystalloid versus colloid administration on postoperative spirometry parameters: a substudy of a randomized controlled clinical trial

Baseline and outcome data

Crystalloid

n = 31

Colloid

n = 29

p-value

ASD

Preoperative FVC; l

3.7 (3–4.5)

3.6 (3–4)

0.56a

0.14

Preoperative FEV1; l

3.1 (2.4–3.6)

2.9 (2.5–3.6)

0.50a

0.19

Preoperative PEF; l.sec−1

6.4 (4.5–8.3)

6 (4.7–7.5)

0.73a

0.11

 

n = 23

n = 22

  

6-h postoperative FVC; l

1.6 (1.2–2)b

1.9 (1.5–2.4)b

0.15a

 

6-h postoperative FEV1; l

1.1 (0.9–1.6)b

1.4 (1.2–1.7)b

0.18a

 

6-h postoperative PEF; l.sec−1

2 (1.5–3.6)b

2.3 (1.8–3.4)b

0.23a

 
 

n = 29

n = 29

  

24-h postoperative FVC; l

1.5 (1.3–2)

1.5 (1.2–2.1)

0.82a

 

24-h postoperative FEV1; l

1.3 (0.9–1.7)

1.3 (1–1.7)

0.92a

 

24-h postoperative PEF; l.sec−1

2.2 (1.6–3.7)

2.3 (1.8–3.4)

0.64a

 
 

n = 29

n = 26

  

48-h postoperative FVC; l

1.5 (1.3–1.9)

1.8 (1.4–2.3)

0.97a

 

48-h postoperative FEV1; l

1.2 (0.9–1.9)

1.3 (1–1.9)

0.41a

 

48-h postoperative PEF; l.sec−1

2.7 (1.6–3.9)

2.4 (1.7–3)

0.39a

 
  1. Data are presented as median (IQR). Abbreviations: ASD, absolute standardized differences; FEV1, forced expiratory pressure in 1 second; FVC, forced vital capacity; PEF, peak expiratory flow. aWilcoxon rank-sum test. bWilcoxon signed-rank test, significantly different from preoperative baseline, p < 0.001