Table 2.

Factors influencing the depth of cleaning of the tongue and palate without causing nausea: univariate analysis (N = 276)

Stratification factors	Palate			Tongue
	Cleaning depth (cm)	t/F	P-value	Cleaning depth (cm)	t/F	P-value
Sex
Male	7.30 ± 1.50	− 2.698a	0.010	7.45 ± 1.50	− 2.569a	0.013
Female	6.65 ± 0.95			6.83 ± 1.00
Height
≥ 163.00 cm	6.83 ± 1.20	1.405a	0.161	6.93 ± 1.28	0.189a	0.850
< 163.00 cm	6.65 ± 0.89			6.91 ± 0.88
BMI
Overweight and obese	7.19 ± 1.36	5.406b	0.005	7.37 ± 1.10
Normal	6.72 ± 1.00			6.90 ± 1.11	6.104b	0.003
Underweight	6.32 ± 0.87			6.38 ± 0.93
Measuring time
1st measurement	6.44 ± 1.19	104.035b	< 0.001	6.76 ± 1.21
2nd measurement	6.77 ± 1.10			6.96 ± 1.15	33.019b	< 0.001
3rd measurement	7.03 ± 1.12			7.06 ± 1.17

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