Impact of the Ultrasonic scalpel on the amount of drained lymph after axillary or inguinal lymphadenectomy

BMC Surgery

Table 3 Factors associated with lymph draining

	Harmonic	p-value	Control	p-value
Procedure (inguinal vs. axillary)	2285 (799; 3770)	<0.001	2272 (−1930; 6475)	0.290
Sentinel node biopsy (no vs. yes)	388 (−1126; 1903)	0.620	24 (−3470; 3517)	0.990
Gender (woman vs. man)	300 (−1165; 1764)	0.690	2132 (−1362; 5627)	0.230
Age (per year)	−9 (−56; 37)	0.700	34 (−102; 169)	0.630
BMI (per kg/m²)	122 (−36; 279)	0.130	−32 (−405; 342)	0.870
Day	−123 (−144; −103)	<0.001	−121 (−148; −95)	<0.001

BMI, body mass index. Results are expressed as coefficient and 95% confidence interval (CI) of the fixed parameters. Statistical analysis by a mixed model using individual origin and day slope as random effect parameters. Test for interaction between type of scalpel and day: z = 0.06, p-value = 0.953

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