Table 3. Relationship between surgery and the VAS pain scale.

Variable 24-hour post-surgery pain scale	Simple Mastectomy + SNLI	Mastectomy simples + PLS + linfadenectomia	Modified radical mastectomy	p-value
No pain	7 (53.85)	1 (50.00)	30 (44.78)	0.861
Mild pain	6 (46.15)	1 (50.00)	27 (40.30)
Moderate pain	0 (0.00)	0 (0.00)	9 (13.43)
Severe pain	0 (0.00)	0 (0.00)	1 (1.49)

The data are presented as the proportion (%) in each group about relationship between types of surgery and pain scale after 24h postoperative. *SNLI: Sentinel lymph node investigation. **Chi-square test.