Table 1.

Correlation coefficients between the results of 4 parameters regarding oral malodor.

	n	Spearman's correlation
		CH3SH	(CH3)2S	OT
H2S
<600 ppb	335	r = 0.247	r = 0.449	r = 0.422
≥600 ppb	24	p < 0.001	p < 0.001	p < 0.001
CH3SH
<100 ppb	165		r = 0.294	r = 0.906
≥100 ppb	194		p < 0.001	p < 0.001
(CH3)2S
<100 ppb	305			r = 0.472
≥100 ppb	54			p < 0.001
OT
Score 0	164
Score 1	83
Score 2	59
Score 3	26
Score 4	27

OT: organoleptic test; n: number of subjects.

r: correlation coefficient.