Table 1.

Studies on PET compared to surgery alone

Ref., author	Number of patients	Therapy	Follow-up	Outcome	ER status evaluated
[13] Fentiman et al.	164	Radical mastectomy or tamoxifen 20 mg daily	Median of 10 years	OS HR (95% CI) 1.11 (0.75–1.65) PFS HR (95% CI) 0.55 (0.39–0.77)	No
[14] Kenny et al.	131	Wedge mastectomy or tamoxifen 40 mg daily	Median of 5 years	OS HR (95% CI) 1.06 (0.59–1.92) PFS not calculated	No
[15, 16] Gazet et al.	200	Mastectomy or tamoxifen 20 mg daily	6 years	OS HR (95% CI) 0.75 (0.44–1.26) PFS not calculated	No
[5] Chakrabati et al.	131	Wedge mastectomy or tamoxifen 20 mg daily	20 years	OS P = 0.4457 PFS P = <0.001	No

ER oestrogen receptor, OS overall survival, HR hazard ratio, CI confidence interval, PFS progression-free survival