Table 6.

Pearson Correlation among the Situational Vertigo Questionnaire Score and Sleep Duration, Smartphone Use, and Headache

	Sleep Duration	Smartphone Use	Headaches	SVQ Score
Sleep duration
Pearson correlation	1	−0.735**	0.197**	−0.843**
Significance (two-tailed)		0.000	0.000	0.000
N	1,584	1,582	1,583	1,584
Smartphone use
Pearson correlation	−0.735**	1	0.188**	0.671**
Significance (two-tailed)	0.000		0.000	0.000
N	1,582	1,593	1,592	1,582
Headaches
Pearson correlation	0.197**	0.188**	1	0.253**
Significance (two-tailed)	0.000	0.000		0.000
N	1,583	1,592	1,599	1,583
SVQ score
Pearson correlation	−0.843**	0.671**	0.253**	1
Significance (two-tailed)	0.000	0.000	0.000
N	1,584	1,582	1,583	1,584

** A significant correlation was considered at the level of 0.01 (two-tailed).