Table 1 Baseline patient characteristics before and after propensity score matching (PSM).
Factors | Pre-PSM | RT (n = 1381) | Post-PSM | ||||||
|---|---|---|---|---|---|---|---|---|---|
Non-RT (n = 12,497) | Overall (n = 13,878) | Comparison | Comparison | Non-RT (n = 1381) | Overall (n = 2762) | ||||
X2 | P | X2 | P | ||||||
Age at diagnosis (n, %) | |||||||||
< 60 years | 4613 (36.9) | 5025 (36.2) | 29.99 | < 0.01 | 412 (29.8) | 0.20 | 0.91 | 409 (29.6) | 821 (29.7) |
≥ 60, < 70 years | 4646 (37.2) | 5190 (37.4) | 544 (39.4) | 555 (40.2) | 1099 (39.8) | ||||
≥ 70, < 85 years | 3238 (25.9) | 3663 (26.4) | 425 (30.8) | 417 (30.2) | 842 (30.5) | ||||
Gender (n, %) | |||||||||
Female | 2819 (22.6) | 3082 (22.2) | 8.68 | < 0.01 | 263 (19.0) | 0.01 | 0.92 | 260 (18.8) | 523 (18.9) |
Male | 9678 (77.4) | 10,796 (77.8) | 1118 (81.0) | 1121 (81.2) | 2239 (81.1) | ||||
Ethnicity (n, %) | |||||||||
White | 8833 (70.7) | 9858 (71.0) | 7.72 | 0.02 | 1025 (74.2) | 0.09 | 0.96 | 1029 (74.5) | 2054 (74.4) |
Black | 1718 (13.7) | 1881 (13.6) | 163 (11.8) | 158 (11.4) | 321 (11.6) | ||||
Others | 1946 (15.6) | 2139 (15.4) | 193 (14.0) | 194 (14.0) | 387 (14.0) | ||||
Marital status (n, %) | |||||||||
Married | 5859 (46.9) | 6659 (48.0) | 70.30 | < 0.01 | 800 (57.9) | 0.92 | 0.92 | 810 (58.7) | 1610 (58.3) |
Single | 2871 (23.0) | 3081 (22.2) | 210 (15.2) | 217 (15.7) | 427 (15.5) | ||||
Divorced | 1670 (13.4) | 1841 (13.3) | 171 (12.4) | 156 (11.3) | 327 (11.8) | ||||
Widowed | 1059 (8.5) | 1159 (8.4) | 100 (7.2) | 97 (7.0) | 197 (7.1) | ||||
Others/Unknown | 1038 (8.3) | 1138 (8.2) | 100 (7.2) | 101 (7.3) | 201 (7.3) | ||||
T Stage (n, %) | |||||||||
T1 | 5666 (45.3) | 6160 (44.4) | 56.50 | < 0.01 | 494 (35.8) | 2.11 | 0.55 | 489 (35.4) | 983 (35.6) |
T2 | 3028 (24.2) | 3381 (24.4) | 353 (25.6) | 354 (25.6) | 707 (25.6) | ||||
T3 | 3454 (27.6) | 3950 (28.5) | 496 (35.9) | 511 (37.0) | 1007 (36.5) | ||||
T4 | 349 (2.8) | 387 (2.8) | 38 (2.8) | 27 (2.0) | 65 (2.4) | ||||
Grade (n, %) | |||||||||
Grade I-II | 2356 (18.9) | 2689 (19.4) | 24.02 | < 0.01 | 333 (24.1) | 1.06 | 0.59 | 320 (23.2) | 653 (23.6) |
Grade III-IV | 638 (5.1) | 716 (5.2) | 78 (5.6) | 69 (5.0) | 147 (5.3) | ||||
Unknown | 9503 (76.0) | 10,473 (75.5) | 970 (70.2) | 992 (71.8) | 1962 (71.0) | ||||
Serum AFP (n, %) | |||||||||
Elevated | 7721 (61.8) | 8617 (62.1) | 5.78 | 0.06 | 896 (64.9) | 0.73 | 0.70 | 917 (66.4) | 1813 (65.6) |
Normal | 2649 (21.2) | 2928 (21.1) | 279 (20.2) | 269 (19.5) | 548 (19.8) | ||||
Unknown | 2127 (17.0) | 2333 (16.8) | 206 (14.9) | 195 (14.1) | 401 (14.5) | ||||
Chemotherapy (n, %) | |||||||||
Yes | 6821 (54.6) | 7440 (53.6) | 47.23 | < 0.01 | 619 (44.8) | 0.01 | 0.94 | 622 (45.0) | 1241 (44.9) |
No | 5676 (45.4) | 6438 (46.4) | 762 (55.2) | 759 (55.0) | 1521 (55.1) | ||||
