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Table 1 Results of multivariable analysis for risk factors of sentinel lymph node nonvisualization on lymphoscintigraphy after initial injection of the radiotracer

From: Risk factors for nonvisualization of the sentinel lymph node on lymphoscintigraphy in breast cancer patients

Characteristics N N of nonvisualization (%) Univariate analysis Multivariable analysis
P-value Adjusted OR (95% CI) P-value
Age (years)     < 0.001b   
 < 50 364 57 (15.7)   1  
50–70 867 216 (24.9)   1.25 (0.85–1.82) 0.254
 ≥ 70 300 112 (37.3)   2.27 (1.46–3.53)  < 0.001
BMI (kg/m2)    0.003b   
 < 25 363 83 (22.9)   1  
25–30 313 91 (29.1)   1.24 (0.87–1.77) 0.229
 ≥ 30 284 95 (33.5)   1.48 (1.04–2.12) 0.031
Unknown 571     
Tumor palpability     < 0.001a   
Palpable 938 199 (21.2)   1  
Nonpalpable 593 186 (31.4)   1.54 (1.15–2.07) 0.004
Tumor location    0.591a   
Medial/central 418 108 (25.8)    
Lateral 803 219 (27.3)    
Unknown 310     
Brand radiopharmaceutical    0.182a   
Nanocoll 1225 299 (24.4)    
Nanoscan 306 86 (28.1)    
Injected dose (MBq)    0.172b   
 < 100 6 1 (16.7)    
100–150 1446 370 (25.6)    
 ≥ 150 79 14 (17.7)    
Injected volume (ml)    0.475b   
 < 0.2 409 107 (26.2)    
0.2–0.3 1075 268 (24.9)    
 ≥ 0.3 47 10 (21.3)    
Experience of preparer (preparations)    0.390a   
 < 50 621 149 (24.0)    
 ≥ 50 910 236 (25.9)    
Experience of administrator (procedures)    0.739a   
 < 50 297 88 (29.6)    
 ≥ 50 470 134 (28.5)    
Unknown 764     
  1. aPearson Chi-Square exact test for categorical variables
  2. bMantel–Haenszel exact test for ordinal variables