. 2017 Nov 6;5(11):e169. doi: 10.2196/mhealth.8238

Table 5.

Statistically significant Spearman correlation between formant frequencies and clinical variables on the male (n=241) population (for clarity, nonsignificant correlation values are omitted).

Feature		Apnea-hypopnea index	Weight	Height	Age	Body mass index	Cervical perimeter
Vowel /a/
	Formant, F1				−.14^a
	F2			−.13^a	−.13^a
	Bandwidth, BW1				−.21^b
	BW2	.13^a
Vowel /e/
	F1			−.12^a	−.12		−.17^b
	F2		−.15^a	−.20^b			−.16^a
	F3			−.21^b
	BW1				−.17^b		−.17^b
	BW2						−.16^a
	BW3	−.17^b	−.14^a			−.13^a
Vowel /i/
	F1			−.15^a	.16^a
	F2			−.21^b
	F3						−.20^b
	BW1				−.13^a
	BW3		−.15^a	−.14^a
Vowel /o/
	F1						−.13^a
	F2				−.27^b
	F3			−.17^b
	BW1						−.13^a
	BW2		−.16^a		.15^a	−.14^a
Vowel /u/
	F1			−.14^a
	F2				−.24^b
	F3		−.14^a	−.20^b

^aCorrelation is significant at the .05 level (two-tailed).

^bCorrelation is significant at the .01 level (two-tailed).