Table 1 Sample characteristics

Demographic characteristics

 Age (in years)

41.20 ± 11.34

 Gender

  Female

66 (62.86%)

  Male

39 (37.14%)

 Race

  Caucasian

57 (54.29%)

  Hispanic

35 (33.33%)

  African-American

13 (12.38%)

Clinical characteristics

 Mood state

  YMRS

14.62 ± 9.27

  IDS-30-C

24.52 ± 12.18

 Psychiatric medication status

  Medicated

90 (86.54%)

  Unmedicated

14 (13.64%)

  Lithium

19 (18.10%)

  Anticonvulsants

56 (53.33%)

  Antidepressants

45 (42.86%)

  Antipsychotics

55 (52.38%)

  Benzodiazepines

26 (24.76%)

Actigraphic assessments

 Interdaily stability (IS)

0.52 ± 0.15

 Intradaily variability (IV)

0.67 ± 0.20

 Relative amplitude (RA)

0.80 ± 0.14

 Goodness-of-fit (GOF)

0.46 ± 0.13

 Sleep efficiency

66.02 ± 13.55

 Sleep percent

31.42 ± 7.08

 Average daily sleep time (in hours)

7.49 ± 2.19

 24-h correlation

0.25 ± 0.13

 Mesor

2925.24 ± 1604.64

 Amplitude

2159.33 ± 1235.05

 Circadian quotient (CQ)

0.74 ± 0.17

 Activity mean

2843.84 ± 1565.51

 Activity median

1852.60 ± 1614.06

 Acceleration index

38.26 ± 115.35

 Activity index

65.48 ± 29.87

Clinical chronobiological assessments

 5-Item Social Rhythm Metric (SRM-5)

3.79 ± 1.30

 Pittsburgh Sleep Quality Index (PSQI)

10.30 ± 4.04