Demographics	Variables	Fluid type: USG			Fluid type: Biochemical
Demographics	Variables	Transudate (n = 14)	Exudate (n = 29)	P value	Transudate (n = 11)	Exudate (n = 32)	P value
Age in years	・ <45 years	7 (50%)	14 (48.3%)	0.916	5 (45.5%)	16 (50%)	0.795
Age in years	・ >45 years	7 (50%)	15 (51.7%)	0.916	6 (54.5%)	16 (50%)
Gender	・ Male	3 (21.4%)	18 (62.1%)	0.012*	3 (27.3%)	18 (56.3%)	0.097⁺
Gender	・ Female	11 (78.6%)	11 (37.9%)	0.012*	8 (72.7%)	14 (43.8%)