Table 1.

Distribution of age, quality of sleep and diurnal sleepiness, according to chronotype among medical students of the Federal University of Paraiba, João Pessoa, Paraíba, Brazil.

Variables	Groupb	N	Mean	SD	p
Age	Evening	46	22.0	2.7	NS
Indifferent	114	22.2	3.2
Morning	61	22.8	5.2
PSQI	Evening	46	7.6	2.8	<0.0005*
Indifferent	114	6.63	2.5
Morning	61	5.43	2.2
Epworth	Evening	46	9.1	3.7	NS
Indifferent	114	9.1	2.8
Morning	61	9.2	3.6

^⁎p<0.05.

^bGroups determined by the Standard Questionnaire for the identification of chronotypes (MEQ); N: group size; SD: standard deviation; p: statistical significance for the Kruskall–Wallis test; NS: Non-significant; PSQI: Pittsburg Sleep Quality Index; Epworth: Epworth Sleepiness Scale.