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Table 1 comparison of baseline characteristics between men and women groupts in the original and matched data sets in patients with ESCC

From: Impact of sex on the prognosis of patients with esophageal squamous cell cancer underwent definitive radiotherapy: a propensity score-matched analysis

characteristics Original data set Matched data set
Men(%) Women(%) χ2 /t p Men(%) Women(%) χ2 /t p
Age (years) 63 (39–89) 68 (40–95) −3.49 0.001 65.5 (43–89) 67 (40–95) −1.525 0.128
Location   3.27 0.352   2.54 0.468
Cervical 31 (6.2) 14 (7.5)    17 (9.6) 12 (6.7)   
Upper thoracic 106 (21.3) 45 (24.2) 46 (25.8) 41 (23.0)
Middle thoracic 291 (58.6) 110 (59.1) 92 (52.8) 108 (60.7)
Lower thoracic 69 (13.9) 17 (9.1) 21 (11.8) 17 (9.6)
T stage   12.11 0.007   2.14 0.543
 T1 8 (1.6) 6 (3.2)    5 (2.8) 4 (2.2)   
 T2 12,024.1) 65 (34.9) 51 (28.7) 62 (34.8)
 T3 135 (27.2) 50 (26.9) 57 (32.0) 47 (26.4)
 T4 234 (47.1) 65 (34.9) 65 (36.5) 65 (36.5)
N stage   12.51 0.000   0.354 0.552
 N0 88 (17.7) 56 (30.9)    46 (25.8) 51 (28.7)   
 N1 409 (82.3) 130 (69.1) 132 (74.2) 127 (71.3)
TNM stage   17.70 0.001   4.35 0.226
 I 47 (9.5) 36 (19.4)    29 (16.3) 32 (18.0)   
 II 147 (29.6) 64 (34.4) 65 (36.5) 60 (33.7)
 III 290 (58.4) 84 (45.2) 76 (42.7) 84 (47.2)
 IV 13 (2.6) 2 (1.1) 8 (4.5) 2 (1.1)
Treatment   12.32 0.000   2.23 0.135
 RT 193 (38.8) 100 (53.8)    106 (59.6) 92 (51.7)   
 CCRT 304 (61.2) 86 (46.2) 72 (40.4) 86 (48.3)
RT dose (Gy) 64 (50–78) 64 (50–70) 0.44 0.660 64 (50–74) 64 (50–70) 1.552 0.131