Table 1 Respondents’ characteristics

Attributes

Sex

Male

470

(70.7)

Female

195

(29.3)

Age (years)

19.7

±

0.8

Sleep Health

Bedtime (hour)

0:02

±

1:07

Wake-up time (hour)

7:29

±

1:20

Midpoint of sleep (hour)

3:46

±

1:04

Sleep duration (hour)

6:46

±

1:04

Subjective sleep quality

Global PSQI score (points)

4.96

±

2.47

Poor sleep quality

Presence

252

(37.9)

Absence

413

(62.1)

Component score (points)

Sleep quality

1.00

[0.50]

Sleep latency

1.00

[1.00]

Sleep duration

1.00

[1.00]

Sleep efficiency

0.00

[0.00]

Sleep disturbance

1.00

[0.50]

Use of sleep medication

0.00

[0.00]

Daytime dysfunction

1.00

[0.50]

Lifestyle habits

Skipping breakfast

Yes

361

(54.3)

No

304

(45.7)

Taking caffeinated drinks

Yes

312

(46.9)

No

353

(53.1)

Using smartphone/cellphone after lights out

Yes

454

(68.3)

No

211

(31.7)

Morning practice

0–3 days/week

530

(79.7)

4–7 days/week

135

(20.3)