Table 2. Self-reported oral hygiene practices of airline pilots categorized according to the intensity of depressive symptoms.

Variables are presented as frequencies (percentages) and compared using Fisher's exact test. 

	Pilots with mild depression	Pilots with minimal depressive symptoms	p value
	(n = 12)	(n = 88)
Frequency of toothbrushing, n (%)
Twice or more per day	4 (33.3)	71 (80.7)	<0.001
Once per day	6 (50.0)	16 (18.2)
Rarely	2 (16.7)	1 (1.1)
Use of mouthwash, n (%)
Habitual users	2 (16.7)	25 (28.4)	0.011
Sporadic users	2 (16.7)	42 (47.7)
Nonusers	8 (66.6)	21 (23.9)