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Table 2 Visual analog scale score of postoperative pain at rest

From: Percutaneous periarticular analgesic injection at one day after simultaneous bilateral total knee arthroplasty: an open-label randomized control trial

Duration after surgery

Additional injection (22 patients/44 knees)

Control (22 patients/44 knees)

P value

Day 0, recovery room

1 ± 2

2 ± 8

0.12

Day 0, 08: 00 PM

11 ± 21

8 ± 13

0.43

Day 1, 06:00 AM

17 ± 24

7 ± 12

0.026a

Day 1, 12:00 PM

18 ± 25

26 ± 27

0.16

Day 1, 08:00 PM

16 ± 21

34 ± 27

< 0.001a

Day 2, 06:00 AM

17 ± 20

39 ± 28

< 0.001a

Day 2, 12:00 PM

19 ± 18

35 ± 28

0.0019a

Day 2, 08:00 PM

21 ± 22

29 ± 24

0.13

Day 3, 06:00 AM

25 ± 27

30 ± 23

0.40

Day 3, 12:00 PM

21 ± 22

28 ± 22

0.18

Day 3, 08:00 PM

21 ± 22

27 ± 24

0.22

Day 4, 06:00 AM

21 ± 20

25 ± 24

0.39

Day 4, 12:00 PM

22 ± 19

23 ± 20

0.84

Day 4, 08:00 PM

16 ± 15

23 ± 20

0.068

Day 5, 06:00 AM

22 ± 20

33 ± 27

0.039a

Day 5, 12:00 PM

17 ± 16

27 ± 24

0.020a

Day 5, 08:00 PM

18 ± 17

27 ± 25

0.047a

  1. Note: The additional injection was routinely performed at 08:30 AM the day after surgery regardless of the time that total knee arthroplasty was performed
  2. Results are expressed as mean ± standard deviation, unless stated otherwise
  3. aSignificant at p < 0.05