Efficacy of Surgery in Patients with Stage I Primary Parotid Gland Lymphoma: A Population-Based Study

Table 6

Impact of surgical techniques on OS and CSS.

	Characteristics	Overall survival HR (95% CI)		Cancer-specific survival HR (95% CI)
Before PSM	No surgery	1		1
	Local tumor excision	0.813 (0.568–1.163)	0.257	0.727 (0.420–1.258)	0.255
	Superficial parotidectomy	0.699 (0.498–0.982)	0.039	0.726 (0.441–1.194)	0.207
	Total parotidectomy	0.592 (0.432–0.809)	0.001	0.426 (0.256–0.709)	0.001
After PSM	No surgery	1		1
	Local tumor excision	0.686 (0.400–1.179)	0.173	0.377 (0.134–1.062)	0.065
	Superficial parotidectomy	0.563 (0.318–0.996)	0.048	0.444 (0.174–1.133)	0.089
	Total parotidectomy	0.533 (0.319–0.892)	0.017	0.319 (0.125–0.815)	0.017