Assessment of the Psychometric Properties of the Holland Sleep Disorders Questionnaire in the Iranian Population

Table 7

Correlation coefficient between HSDQ subscales.

	Parasomnia	Hypersomnia	Insomnia	RLS/PLMD	SBD	CRSD
Parasomnia	1
Hypersomnia	0.044	1
Insomnia	0.057	0.101	1
RLS/PLMD				1
SBD	0.036		0.016		1
CRSD		0.031			0.021	1
HSDQ

Correlation is significant at the 0.05 level (2 tailed). Correlation is significant at the 0.01 level (2 tailed). CRSD: Circadian rhythm sleep disorders; RLS: restless legs syndrome; PLMD: periodic limb movement disorder; SDB: sleep-disordered breathing; HSDQ: Holland Sleep Disorders Questionnaire.