Research Article
Efficacy of Surgery in Patients with Stage I Primary Parotid Gland Lymphoma: A Population-Based Study
Table 2
Comparison of baseline data after PSM.
| | Characteristics | Level | Overall | No surgery | Surgery | | | 464 | 232 | 232 |
| | Age (%) | ≤65 | 251 (54.1) | 116 (50.0) | 135 (58.2) | 0.094 | | >65 | 213 (45.9) | 116 (50.0) | 97 (41.8) | |
| | Sex (%) | Female | 292 (62.9) | 143 (61.6) | 149 (64.2) | 0.631 | | Male | 172 (37.1) | 89 (38.4) | 83 (35.8) | |
| | Race (%) | White | 386 (83.2) | 193 (83.2) | 193 (83.2) | 0.261 | | Black | 49 (10.6) | 21 (9.1) | 28 (12.1) | | | Other | 29 (6.2) | 18 (7.8) | 11 (4.7) | |
| | Marital status (%) | No married | 222 (47.8) | 106 (45.7) | 116 (50.0) | 0.403 | | Married | 242 (52.2) | 126 (54.3) | 116 (50.0) | |
| | Year of diagnosis (%) | 1998–2003 | 107 (23.1) | 54 (23.3) | 53 (22.8) | 0.412 | | 2004–2009 | 156 (33.6) | 84 (36.2) | 72 (31.0) | | | 2010–2015 | 201 (43.3) | 94 (40.5) | 107 (46.1) | |
| | Histology (%) | MALT | 195 (42.0) | 96 (41.4) | 99 (42.7) | 0.046 | | DLBCL | 97 (20.9) | 55 (23.7) | 42 (18.1) | | | FL | 95 (20.5) | 37 (15.9) | 58 (25.0) | | | Other | 77 (16.6) | 44 (19.0) | 33 (14.2) | |
| | Laterality (%) | Right | 213 (45.9) | 107 (46.1) | 106 (45.7) | 0.249 | | Left | 237 (51.1) | 115 (49.6) | 122 (52.6) | | | Bilateral | 14 (3.0) | 10 (4.3) | 4 (1.7) | |
| | Radiation (%) | No | 251 (54.1) | 126 (54.3) | 125 (53.9) | 1.000 | | Yes | 213 (45.9) | 106 (45.7) | 107 (46.1) | |
| | Chemotherapy (%) | No | 312 (67.2) | 155 (66.8) | 157 (67.7) | 0.921 | | Yes | 152 (32.8) | 77 (33.2) | 75 (32.3) | |
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CI: confident interval and HR: hazard ratio.
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