Table 3.

Clinical and demographic characteristics of patients with and without relapse

	Relapse (N=27)	Nonrelapse (N=32)	P-value
Age (years)a			0.0339*
<18	23	18
≥18	4	14
Sexa			0.653
Male	11	16
Female	16	16
Age at DSWPD onset (years)a			0.0136*
<16	22	15
≥16	5	17
DSWPD duration (months)a			0.905
<12	13	17
≥12	14	15
Motivation for the occupationb			<0.001*
Absent	10	0
Present	17	32
Family living togetherb			1
Absent	0	1
Present	27	31
Bright light therapya			0.0737
Absent	19	14
Present	8	18

Notes: Values are presented as numbers.

^*P-values with significant results.

^aChi-squared test.

^bFisher’s exact test.

Abbreviation: DSWPD, delayed sleep–wake phase disorder.