Table 1.

Demographic data and postoperative outcomes

	Chronic pain (n = 17)	No chronic pain (n = 29)	p value
Age (years)	55.7 ± 11.7	57.4 ± 12.4	0.78
Height (cm)	156.2 ± 6.9	155.3 ± 6.0	0.60
Body weight (kg)	56.8 ± 10.9	55.7 ± 9.1	0.82
Body mass index	23.3 ± 4.0	23.1 ± 3.1	0.97
Type of surgery
Lumpectomy	10	13	0.38
Mastectomy	7	16
No. of axillary lymph nodes removed	4	5	0.71
Treatment received
Surgery alone	16	26
Surgery + radiation	0	1	1
Surgery + chemotherapy	0	1
Surgery + radiation + chemotherapy	1	1
Postsurgery (months)	15.2 ± 1.4	14.7 ± 1.3	0.18
No. of perioperative thoracic paravertebral nerve blocks	5	18	0.039
Postsurgery acute pain (<24 h)
Severe	2 (11.8 %)	0 (0 %)
Moderate	6 (35.3 %)	9 (31.0 %)	0.33
Mild	5 (29.4 %)	11 (37.9 %)
None	4 (23.5 %)	9 (31.0 %)
Incidence of rescue analgesics	1 [0–4]	0 [0–3]	0.23
No. of cancer recurrence	0	0	1

Data are shown as mean ± SD or median [range]