Table 6.

Perioperative characteristics of paravertebral block in breast cancer patients*

Characteristics of PVB	Median (95% CI) time in minutes		P†
	LG group (n = 40)	LLG group (n = 40)
TSB onset	8.5 (8.0-10.0)	3.0 (3.0-4.0)	<0.001
TSR end	490.0 (460.0-520.0)	385.0 (350.0-460.0)	0.007
Time from PVB administration to the first hemodynamic measurement	45.0 (45.0-48.0)	30.0 (30.0-35.0)	<0.001
Time from PVB administration to incision	50.0 (50.0-55.0)	35.0 (35.0-40.0)	<0.001

*Abbreviations: CI – confidence interval; LG – 0.5% levobupivacaine; LLG – 0.5% levobupivacaine + 2% lidocaine; TSB – time of sensory blockade; TSR – time of sensory regression; PVB – paravertebral block .

†Mann-Whitney U test.