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Table 2 Subgroup analysis regarding the total drainage volume

From: A randomized controlled study comparing a vessel sealing system with the conventional technique in axillary lymph node dissection for primary breast cancer

Variables Vessel sealing system (BVSS) Conventional devices (CONV) P value
Total 365 ± 242 625 ± 447 0.006
Age    
 <60 years 293 ± 144 612 ± 438 0.02
60 years 425 ± 291 637 ± 468 0.146
BMI    
 <25 304 ± 179 594 ± 415 0.005
25 620 ± 317 828 ± 657 0.517
Tumor size    
 T1, T2 388 ± 330 648 ± 438 0.011
 T3, T4 211 ± 107 534 ± 511 0.476
Nodal status    
 Negative 410 ± 295 774 ± 475 0.175
 Positive 341 ± 212 561 ± 430 0.046
Neoadjuvant therapy    
 Yes 374 ± 310 868 ± 511 0.011
 No 361 ± 211 564 ± 419 0.092
Breast surgery    
 Mastectomy 346 ± 180 505 ± 396 0.265
 Breast-conserving therapy 412 ± 321 805 ± 473 0.02
Experience of surgeon    
 <7 years 530 ± 441 691 ± 558 0.642
7 years 341 ± 201 608 ± 427 0.007