Table 3 Static and dynamic postoperative NRS in both CPBS and No-CPBS groups. Numeric rating scale (NRS) values are expressed as median and IQR
Pain intensity | Total (n = 307) | No-CPBS (n = 221) | CPBS (n = 86) | OR [95% CI] | p |
|---|---|---|---|---|---|
At 0 h | |||||
 NRS at rest | 1 [0, 9] | 1 [0, 9] | 1 [0, 8] | 1.13 [1.00–1.28] | 0.075 |
 NRS during movement | 1 [0, 10] | 1 [0, 10] | 2 [0, 9] | 1.12 [1.01–1.25] | 0.051 |
At 3 h | Total (n = 306) | No CPBS (n = 220) | CPBS (n = 86) |  |  |
 NRS at rest | 1 [0, 7] | 1 [0, 5] | 1 [0, 7] | 1.28 [1.02–1.62] | 0.034 |
 NRS during movement | 2 [1, 8] | 2 [0, 6] | 2 [0, 8] | 1.31 [1.08–1.59] | 0.004 |
At 6 h | Total (n = 292) | No CPBS (n = 208) | CPBS (n = 84) |  |  |
 NRS at rest | 1 [0, 5] | 1 [0, 5] | 1 [0, 5] | 1.24 [0.98–1.56] | 0.101 |
 NRS during movement | 2 [1, 7] | 2 [0, 5] | 2 [0, 7] | 1.27 [1.06–1.54] | 0.041 |
At 12 h | Total (n = 254) | No CPBS (n = 180) | CPBS (n = 74) |  |  |
 NRS at rest | 1 [0, 6] | 1 [0, 6] | 1 [0, 5] | 1.26 [0.99–1.58] | 0.036 |
 NRS during movement | 2 [0, 7] | 2 [0, 6] | 2 [0, 7] | 1.24 [1.04–1.48] | 0.024 |
At 24 h | Total (n = 156) | No CPBS (n = 111) | CPBS (n = 45) |  |  |
 NRS at rest | 1 [0, 5] | 1 [0, 4] | 1 [0, 5] | 1.36 [0.98–1.90] | 0.110 |
 NRS during movement | 2 [0, 6] | 1 [0, 5] | 2 [0, 6] | 1.35 [1.06–1.71] | 0.024 |
At 48 h | Total (n = 58) | No CPBS (n = 35) | CPBS (n = 23) |  |  |
 NRS at rest | 1 [0, 4] | 1 [0, 4] | 1 [0, 2] | 0.86 [0.47–1.56] | 0.817 |
 NRS during movement | 2 [0, 6] | 2 [0, 5] | 2 [0, 6] | 1.26 [0.90–1.75] | 0.279 |