Table 2.

Relationships between self-perception of oral malodor and associated parameters.

	Self-perceived oral malodor		p value
	(+) (n = 294)	(−) (n = 65)
H2S
<600 ppb	22	2	0.311 NS
≥600 ppb	272	63
CH3SH
<100 ppb	153	41	0.106 NS
≥100 ppb	141	24
(CH3)2S
<100 ppb	46	8	0.624 NS
≥100 ppb	248	57
Organoleptic test
Score 0	140	24	0.117 NS
Score 1	63	20
Score 2	49	10
Score 3	18	8
Score 4	24	3

NS: no significant difference (Chi-square test).