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

Table 3

Comparison of overall survival and cancer-specific survival.

	Characteristics	Overall survival HR (95% CI)		Cancer-specific survival HR (95% CI)
Before PSM	No surgery	1		1
	Surgery	0.673 (0.519, 0.873)	0.003	0.595 (0.403, 0.879)	0.008
After PSM	No surgery	1		1
	Surgery	0.569 (0.399, 0.810)	0.002	0.384 (0.220, 0.669)	0.001