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Table 1 Demographic factors in NS and BES groups

From: Intraoperative Brief Electrical Stimulation of the Spinal Accessory Nerve (BEST SPIN) for prevention of shoulder dysfunction after oncologic neck dissection: a double-blinded, randomized controlled trial

Variable Entire cohort NS BES P-value
Number 54 27 27
Age 57.8 57.9 57.8 0.557
Gender
 Males 44 (81.5%) 21 (38.9%) 23 (42.6%) 0.555
 Females 11 (20.4%) 6 (11.1%) 5 (9.3%)
TNM stage
 Early 9 (16.7%) 5 (9.3%) 4 (7.4%) 0.352
 Advanced 46 (85.2%) 22 (40.7%) 24 (44.4%)
Tumor site
 Oral cavity 18 (33.3%) 10 (18.5%) 8 (14.8%) 0.231
 Oropharynx 13 (24.1%) 7 (13.0%) 6 (11.1%) 0.532
 Larynx 12 (22.2%) 7 (13.0%) 5 (9.3%) 0.323
 Other 12 (22.2%) 7 (13.0%) 5 (9.3%) 0.323
Charlson Comorbidity Index 1.57 1.43 1.63 0.754
Smoking (Pack-years) 17.3 16.4 19.7 0.522
BMI (kg) 3.73 4.68 2.98 0.713
Radiotherapy 42 (77.8%) 22 (40.7%) 20 (37.0%) 0.372
Chemotherapy 15 (27.8%) 5 (9.3%) 10 (18.5%) 0.112
  1. NS no stimulation, BES brief electrical stimulation, BMI body mass index