Table 1 Baseline characteristics
Variables | Original data set | After PSM | |||||
|---|---|---|---|---|---|---|---|
Cryosurgery, n = 2785 | Thermal ablation, n = 983 | P | Cryosurgery, n = 1931 | Thermal ablation, n = 980 | P | ||
Age (%) | |||||||
> 65 | 1518 (54.5) | 570 (58.0) | 0.064 | 1128 (58.4) | 569 (58.1) | 0.886 | |
≤ 65 | 1267 (45.5) | 413 (42.0) | 803 (41.6) | 411 (41.9) | |||
Sex (%) | |||||||
Female | 1060 (38.1) | 398 (40.5) | 0.192 | 760 (39.4) | 396 (40.4) | 0.612 | |
Male | 1725 (61.9) | 585 (59.5) | 1171 (60.6) | 584 (59.6) | |||
Race (%) | |||||||
Black | 278 (10.0) | 127 (12.9) | 0.012 | 229 (11.9) | 125 (12.8) | 0.762 | |
Other | 150 (5.4) | 64 (6.5) | 123 (6.4) | 64 (6.5) | |||
White | 2357 (84.6) | 792 (80.6) | 1579 (81.8) | 791 (80.7) | |||
Year of diagnosis (%) | |||||||
2004–2008 | 421 (15.1) | 139 (14.1) | < 0.001 | 277 (14.3) | 139 (14.2) | 0.988 | |
2009–2013 | 914 (32.8) | 260 (26.4) | 506 (26.2) | 259 (26.4) | |||
2014–2018 | 1450 (52.1) | 584 (59.4) | 1148 (59.5) | 582 (59.4) | |||
Grade (%) | |||||||
G1/2 | 1354 (48.6) | 451 (45.9) | 0.257 | 892 (46.2) | 451 (46.0) | 0.308 | |
G3/4 | 122 (4.4) | 40 (4.1) | 58 (3.0) | 40 (4.1) | |||
Unknown | 1309 (47.0) | 492 (50.1) | 981 (50.8) | 489 (49.9) | |||
Histology (%) | |||||||
Renal cell | 2272 (81.6) | 797 (81.1) | 0.764 | 1546 (80.1) | 794 (81.0) | 0.571 | |
Other adenocarcinoma | 513 (18.4) | 186 (18.9) | 385 (19.9) | 186 (19.0) | |||
T (%) | |||||||
T1a | 2589 (93.0) | 910 (92.6) | 0.738 | 1798 (93.1) | 910 (92.9) | 0.858 | |
T1b | 196 (7.0) | 73 (7.4) | 133 (6.9) | 70 (7.1) | |||