. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Behav Sleep Med. 2015 Sep 25;14(4):457–466. doi: 10.1080/15402002.2015.1017100

Table 3. Correlations among Study Variables of Daytime Sleepiness, Sleep Quality, and Functional Outcomes by Total Sample and Sex.

	FOSQ General Productivity	FOSQ Social Outcomes	FOSQ Activity Level	FOSQ Vigilance	FOSQ Intimate & Sexual	FOSQ Total Score
ESSTotal Sample	-.319^**^a	-.285^**	-.410^**^a	-.404^**^a	-.114	-.374^**^a
ESS Males	-.263^a	-.159	-.289^a	-.388^**^a	-.151	-.309^*^a
ESS Females	-.383^**^a	-.399^**	-.565^**^a	-.455^**^a	-.075	-.450^**^a

PSQI Total Sample	-.443^**^a	-.378^**	-.416^**^a	-.220^*^a	-.287^**	-.434^**^a
PSQI Males	-.507^**^a	-.456^**	-.579^**^a	-.260^a	-.194	-.479^**^a
PSQI Females	-.348^*^a	-.309^*	-.256^*^a	-.161^a	-.386^**	-.371^**^a

Note.

^**

Correlation is significant at the 0.01 level (2-tailed);

Correlation is significant at the 0.05 level (2-tailed).

Partial Correlation controlling for marital status. ESS = Epworth Sleepiness Scale. PSQI = Pittsburgh Sleep Quality Index. FOSQ = Functional Outcomes of Sleep Questionnaire. Higher scores on FOSQ total score and subscores indicate better functional outcomes. Higher scores on ESS indicate more severe sleepiness. Higher scores on PSQI indicate worse sleep quality.