Table 1 Demographic characteristics (n = 22; Mean ± Standard deviation), together with sleep-wake timings from sleep diary and actigraphy data (Median ± Standard deviation).

From: Circadian dynamics in measures of cortical excitation and inhibition balance

N

22

AGE

22.82 ± 2.61

ETHNICITY

Caucasians

BODY MASS INDEX

22.23 ± 2.05

ANXIETY LEVEL (BDII)

1.23 ± 1.93

MOOD (BECK)

1.68 ± 2.12

DAYTIME PROPENSITY TO FALL ASLEEP (ESS)

3.73 ± 2.73

CHRONOTYPE (HO)

52.41 ± 5.03

RIGHT HANDED

17/22

SLEEP QUALITY (PSQ)

4.09 ± 0.15

SEASONALITY (SPAQ)

0.64 ± 0.79

CAFFELINE (cup/day)

0.41 ± 0.50

ALCOHOL (unit/week)

3.41 ± 0.20

CHRONOTYPE (MCTQ)

4.76 ± 0.16

SLEEP TIME (Sleep diary)

23:25 ± 0:20

WALK TIME (Sleep diary)

7:30 ± 0:17

SLEEP DURATION (Sleep diary)

8:10 ± 0:15

SLEEP TIME (Actigraphy)

23:30 ± 0:15

WALK TIME (Actigraphy)

7:30 ± 0:20

SLEEP DURATION (Actigraphy)

8:00 ± 0:20

  1. ANXIETY LEVEL was measured on the 21 item Beck Anxiety Inventory49 (BAI≤19); CHRONOTYPE was assessed by the Horne‐Ösberg Questionnaire50 (31<HO<69); Daytime propensity to fall asleep in non‐stimulating situations was assessed by the Epworth Sleepiness Scale51 (ESS≤10); MOOD was assessed using the 21-item Beck Depression Inventory II52 (BDI‐II≤19); SLEEP QUALITY was determined by the Pittsburgh Sleep Quality Index Questionnaire53 (PSQI≤5). SEASONALITY is based on the Seasonal Pattern Assessment Questionnaire54 (SPAQ). The Edinburgh Inventory55 was administered to verify that the participants were right‐handed. SLEEP DIARY and ACTIGRAPHY measures were collected during 7-days prior to the study (Data presented in hours).
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