Table 2.
Comparison of baseline data after PSM.
| Characteristics | Level | Overall | No surgery | Surgery | p |
|---|---|---|---|---|---|
| 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) | ||
CI: confident interval and HR: hazard ratio.