Table 2 Stratification analysis of the duration of surgery.

From: Effect of Scalp Nerve Block with Ropivacaine on Postoperative Pain in Patients Undergoing Craniotomy: A Randomized, Double Blinded Study

 

Duration >4 h (n = 52)

Duration ≤4 h (n = 33)

VAS 2 h

VAS 4 h

VAS 6 h

VAS 24 h

VAS 2 h

VAS 4 h

VAS 6 h

VAS 24 h

Group R0.2

1 (0, 2.25)

1 (1,2.25)

1 (0.75, 2)

1.5 (0, 2)

1 (1, 2)

1 (0, 4)

1 (0, 4)

1 (0, 2)

Group R0.33

1 (1, 2)

2 (0.75, 3)

2 (0, 3)

1 (0.75, 2)

1 (0, 2.25)

0.5 (0.5, 3.5)

1.5 (0.75, 4.25)

2 (0.785, 2.25)

Group R0.5

1 (0, 2.5)

1 (0, 2.5)

1 (1, 2)

2 (0.5, 2)

1 (0.5, 2)

1 (0.5, 1.5)

1 (0, 1.75)

1 (0.5, 2.5)

Group C

3 (2, 3)

2.5 (2, 3)

2 (2, 3)

2 (1, 3)

3 (1, 4)

2 (1, 5)

1 (1,3)

1 (0, 3)

P Value

0.035

0.23

0.151

0.264

0.156

0.298

0.691

0.858

  1. Data are presented as median and quartiles.
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