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Table 2 The median percentage change from preoperative limb circumference in control and NPWT groups and the difference in medians measured 24 and 72 h postoperatively

From: A preliminary study of the effect of closed incision management with negative pressure wound therapy over high-risk incisions

  

Median (25th to 75th Quartile)

Difference in medians (95 % CI)

 

Measurement

Time

Control (n = 10)

NPWT (n = 10)

p-valuea

Proximal interphalangeal joint

24 h

19.1

(10.2 to 24.6)

−8.0

(−14.1 to −0.6)

−27.1

(−38.7 to −11.3)

0.002

72 h

14.6

(4.7 to 23.2)

−10.2

(−16.7 to 0.8)

−24.8

(−44.7 to −7.7)

0.002

Distal interphalangeal joint

24 h

20.3

(14.0 to 27.0)

−8.2

(−11. to −1.4)

−28.7

(−37.2 to −15.8)

0.0008

72 h

16.7

(8.6 to 35.0)

−9.8

(−12.0 to 2.7)

−26.5

(−50.0 to −7.0)

0.009

Surgical site

24 h

11.0

(7.2 to 19.0)

3.1

(1.5 to 6.3)

−7.9

(−19.3 to −1.7)

0.02

72 h

11.6

(6.2 to 18.6)

1.5

(−1.6 to 4.6)

−10.1

(−22.7 to −1.4)

0.04

Joint proximal to surgical site

24 h

8.2

(2.4 to 13.3)

0.0

(−0.6 to 1.0)

−8.2

(−15.2 to −1.1)

0.02

72 h

5.6

(1.5 to 8.9)

0.0

(−2.0 to 0.9)

−5.6

(−11.4 to −3.6)

0.16

Joint distal to surgical site

24 h

17.7

(10.5 to 30.9)

2.1

(−1.5 to 4.5)

−15.6

(−33.1 to −3.8)

0.007

72 h

13.4

(8.8 to 24.4)

1.8

(−2.6 to 4.4)

−11.6

(−25.4 to −4.3)

0.009

Mid-bone of affected bone*

24 h

10.4

(4.7 to 12.7)

1.9

(1.3 to 4.7)

−8.5

(−12.7 to −0.6)

0.05

72 h

5.0

(−0.3 to 18.8)

0.6

(−4.1 to 2.4)

−4.4

(−20.9 to −1.8)

0.11

Average measurement

24 h

15.0

(11.7 to 21.6)

−2.0

(−3.5 to 1.4)

−17

(−24.7 to −9.9)

0.008

72 h

14.0

(7.2 to 19.4)

−2.5

(−3.6 to 2.5)

−16.4

(−24.5 to −6.8)

0.0003

  1. aMann–Whitney U test