Table 2. Maximum acute pain based on treatment at different time points.

Variables	Pain	Resting				Coughing
		c-PVI (n=41)	iv-PCA (n=38)	P value		c-PVI (n=41)	iv-PCA (n=38)	P value
POD0	Mild	1 [2]	0 [0]	0.772
	Moderate	8 [20]	6 [16]
	Severe	32 [78]	32 [84]
POD1	Mild	6 [15]	9 [24]	0.299		0 [0]	1 [3]	0.465
	Moderate	15 [37]	17 [45]			6 [15]	8 [21]
	Severe	20 [49]	12 [32]			35 [85]	29 [76]
POD2	Mild	11 [27]	12 [32]	0.711		2 [5]	1 [3]	0.059
	Moderate	16 [39]	16 [43]			13 [32]	21 [57]
	Severe	14 [34]	9 [24]			26 [63]	15 [41]
POD3	Mild	18 [44]	21 [55]	0.264		6 [15]	6 [16]	0.380
	Moderate	16 [39]	15 [40]			18 [44]	22 [58]
	Severe	7 [17]	2 [5]			17 [42]	10 [26]
POD4	Mild	25 [62]	26 [70]	0.181		10 [25]	13 [35]	0.189
	Moderate	11 [28]	11 [30]			19 [47]	20 [54]
	Severe	4 [10]	0 [0]			11 [28]	4 [11]

Values are presented as n [%]. c-PVI, continuous paravertebral infusion; iv-PCA, intravenous patient-controlled analgesia; POD1, postoperative day 1; POD2, postoperative day 2; POD3, postoperative day 3; POD4, postoperative day 4.