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. 2022 Oct 9;13(13):3452–3462. doi: 10.7150/jca.77768

Table 2.

Patient characteristics after propensity score matching.

Non-secondary cancer (n=322) Secondary cancer (n=322) P
Age (year) 0.672
median 59 58
IQR 51-67 52-65
Race 0.751
asian 116 (36.0%) 106 (32.9%)
black 30 (9.3%) 37 (11.5%)
white 10 (3.1%) 10 (3.1%)
other 166 (51.6%) 169 (52.5%)
Sex 0.860
female 90 (28.0%) 87 (27.0%)
male 232 (72.0%) 235 (73.0%)
Grade 0.741
I 7 (2.2%) 8 (2.4%)
II 32 (10.0%) 34 (10.6%)
III 96 (29.8%) 100 (31.1%)
IV 108 (33.5%) 92 (28.6%)
unknown 79 (24.5%) 88 (27.3%)
Pathology 0.345
WHO I 65 (20.2%) 74 (23.0%)
WHO II 108 (33.5%) 119 (37.0%)
WHO III 73 (22.7%) 70 (21.7%)
other 76 (23.6%) 59 (18.3%)
T stage 0.991
1 114 (35.4%) 114 (35.4%)
2 89 (27.6%) 91 (28.3%)
3 59 (18.4%) 60 (18.6%)
4 60 (18.6%) 57 (17.7%)
N stage 0.489
0 85 (26.4%) 94 (29.2%)
1 128 (39.8%) 109 (33.9%)
2 79 (24.5%) 87 (27.0%)
3 30 (9.3%) 32 (9.9%)
AJCC 0.326
I 23 (7.1%) 35 (10.9%)
II 109 (33.9%) 95 (29.5%)
III 102 (31.7%) 104 (32.3%)
IV 88 (27.3%) 88 (27.3%)
Chemotherapy 0.091
no 26 (8.1%) 40 (12.4%)
yes 296 (91.9%) 282 (87.6%)

IQR: interquartile range. WHO: World Health Organization. AJCC: American Joint Committee on Cancer.