Table 1. Demographic and clinical characteristics of patients

	No drain (N=118)	Negative drain (N=102)	p-value
Sex (M:F)	36:82 (30.5%:69.5%)	31:71 (30.4%:69.6%)	1.000
Age	54.87±14.22	49.45±12.96	0.004*
Tumor size (<1 cm:1-4 cm:>4 cm)	73:40:2 (64.4%:33.9%:1.7%)	53:31:18 (52%:30.4%:17.6%)	<0.001†
Cancer	93(78.8%)	61(59.8%)	0.004*
Central neck dissection	100(84.7%)	67(65.7%)	0.001*
Retrieval lymph node	3.36±2.89	2.48±2.83	0.024*

p<0.05;
p<0.001.