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Table 3 Characteristics stratified by critical weight loss before and after propensity-score matching in patients received radiotherapy alone or concurrent chemoradiotherapy

From: Critical weight loss predicts poor prognosis in nasopharyngeal carcinoma

  Before Matching   After Matching  
Characteristics Non-CWL (N = 687) CWL (N = 869) P Non-CWL (N = 687) CWL (N = 687) P
Age (y) media (range) 45 (13–78) 47 (14–77) 0.005 45 (13–78) 46 (15–77) 0.050
Sex (%)       
 Male 522 (76.0) 657 (75.6) 0.863 522 (76.0) 518 (75.4) 0.801
 Female 165 (24.0) 212 (24.4)   165 (24.0) 169 (24.6)  
Clinical stage (%)       
 I-II 388 (56.5) 381 (43.8) <0.001 388 (56.5) 352 (51.2) 0.051
 III–IV 299 (43.5) 488 (56.2)   299 (43.5) 335 (48.8)  
T-stage (%)       
 T1-2 481 (70.0) 529 (60.9) <0.001 481 (70.0) 458 (66.7) 0.182
 T3-4 206 (30.0) 340 (39.1)   206 (30.0) 229 (33.3)  
N-stage (%)       
 N0-1 536 (78.0) 592 (68.1) <0.001 536 (78.0) 521 (75.8) 0.337
 N2-3 151 (22.0) 277 (31.9)   151 (22.0) 166 (24.2)  
Treatment group (%)       
 RT 547 (79.6) 519 (59.7) <0.001 547 (79.6) 509 (74.1) 0.015
 CRT 140 (20.4) 350 (40.3)   140 (20.4) 178 (25.9)  
Smoking status (%)       
 never-smokers 375 (54.6) 450 (51.8) 0.272 375 (54.6) 365 (53.1) 0.588
 ex-smokers 312 (45.4) 419 (48.2)   312 (45.4) 322 (46.9)  
RT dose (Gy), media (range) 70 (60–87) 70 (60–86) 0.081 70 (60–87) 70 (60–86) 0.599
BMI (kg/m2) media (range) 22.05 (14.04–34.89) 22.83 (15.35–39.06) <0.001 22.05 (14.04–34.89) 22.41 (15.35–32.99) 0.058
  1. Notes: RT Radiotherapy alone, CRT Combined chemo-radiotherapy, BMI Pre-RT weight (kg) divided by the square of height (meter)