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Table 1 Clinical characteristics before and after PSM according to CRT or not

From: Impact of chemotherapy and radiotherapy on the survival of elderly esophageal cancer patients undergoing surgery: a SEER database analysis

Variables

Before matching

Pa value

After matching

P value

CRT N = 534 (%)

Non-CRT N = 551 (%)

CRT N = 277 (%)

Non-CRT N = 277 (%)

Sex

  

0.2

  

0.84

 Male

443 (82.96%)

426 (77.31%)

 

212 (76.53%)

214 (77.26%)

 

 Female

91 (17.04%)

125 (22.69%)

 

65 (23.47%)

63 (22.74%)

 

Race

  

0.372

  

0.659

 White

498 (93.26%)

506 (91.83%)

 

250 (90.25%)

253 (91.34%)

 

 Other racesb

36 (6.74%)

45 (8.17%)

 

27 (9.75%)

24 (8.66%)

 

Marriage

  

0.004

  

0.154

 Married

386 (72.28%)

354 (64.25%)

 

188 (67.87%)

172 (62.09%)

 

 Unmarried

148 (27.72%)

197 (35.75%)

 

89 (32.13%)

105 (37.91%)

 

Location

  

0.225

  

0.31

 Upper third

10 (1.87%)

15 (2.72%)

 

8 (2.89%)

10 (3.61%)

 

 Middle third

82 (15.36%)

102 (18.51%)

 

62 (22.38%)

48 (17.33%)

 

 Low third

442 (82.77%)

434 (78.77%)

 

207 (74.73%)

219 (79.06%)

 

Histology

  

0.154

  

0.089

 SCC

106 (19.85%)

129 (23.41%)

 

87 (31.41%)

69 (24.91%)

 

 Adenocarcinoma

428 (80.15%)

422 (76.59%)

 

190 (68.59%)

208 (75.09%)

 

Gradec

  

0.009

  

0.173

 I + II

278 (52.06%)

330 (59.89%)

 

153 (55.23%)

137 (49.46%)

 

 III + IV

256 (47.94%)

221 (40.11%)

 

124 (44.77%)

140 (50.54%)

 

Size

  

0

  

0.341

 < 33 mm

354 (66.29%)

196 (35.57%)

 

171 (61.73%)

160 (57.76%)

 

 ≥ 33 mm

180 (33.71%)

355 (64.43%)

 

106 (38.27%)

117 (42.24%)

 

T stage

  

0

  

0.08

 T1

59 (11.05%)

298 (54.08%)

 

57 (20.58%)

63 (22.74%)

 

 T2

91 (17.04%)

80 (14.52%)

 

64 (23.1%)

48 (17.33%)

 

 T3

347 (64.98%)

160 (29.04%)

 

133 (48.01%)

153 (55.23%)

 

 T4

37 (6.93%)

13 (2.36%)

 

23 (8.3%)

13 (4.69%)

 

Lymph node

  

0

  

0.932

 Positive

371 (69.48%)

404 (73.32%)

 

138 (49.82%)

139 (50.18%)

 

 Negative

163 (30.52%)

147 (26.68%)

 

139 (50.18%)

138 (49.82%)

 

Metastasis

  

0.173

  

0.6

 Yes

25 (4.68%)

17 (3.09%)

 

19 (6.86%)

16 (5.78%)

 

 No

509 (95.32%)

534 (96.91%)

 

258 (93.14%)

261 (94.22%)

 
  1. CRT chemo- and radio-therapy, SCC squamous cell carcinoma
  2. aThe P values of comparing CRT and non-CRT calculated by the using χ2 test
  3. bOther races: Black, American Indian/Alaska Native, Asian/Pacific Islander
  4. cI: well differentiation; II: moderate differentiation; III: poor differentiation; IV: undifferentiation
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BMC Gastroenterology

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