Quality of sleep and use of computers and cell-phones among university students

Cross-sectional and comparative study, which evaluated 425 students through a socioeconomic questionnaire, the Pittsburgh Sleep Quality Index(PSQI), and a questionnaire on their use of computers and cell phones.

RESULTS

Poor sleep quality was observed in 61.4% of medical students and in 60.1% of dentistry students. Medical students with poor sleep quality had a higher mean time of computer use at night when compared to those with good sleep quality (p=0.04), as well as for computer (p<0.001) and cell phone use (p<0.01) immediately before bedtime. Dentistry students with poor sleep quality had a higher average time of computer use before bedtime than those with good sleep quality (p=0.03).

CONCLUSION

Students should receive guidance on prevention strategies and quality of sleep care.

Sleep; Students, Medical; Students, Dental; Technology

Variables	Quality of sleep		p*	P (CI 95%)**
	Poor	Good
	n (%)	n (%)
All Years			0.79	0.89 (0.63-1.69)
Medicine	127(49.2)	80(47.9)
Dentistry	131(50.8)	87(52.1)
First-year			0.35	0.86 (0.24-3.29)
Medicine	22(59.5)	17(48.6)
Dentistry	15(40.5)	18(51.4)
Second-year			0.42	0.33 (0.53-6.49)
Medicine	31(51.7)	11(42.3)
Dentistry	29(48.3)	15(57.7)
Third-year			0.07	0.49 (0.51-4.05)
Medicine	20(36.4)	15(40.5)
Dentistry	35(63.6)	22(59.5)
Fourth-year			0.49	0.89 (0.30-2.82)
Medicine	17(37.8)	12(46.2)
Dentistry	28(62.2)	14(53.8)
Fifth-year			0.80	0.71 (0.42-3.58)
Medicine#	37(60.7)	25(58.1)
Dentistry	24(39.3)	18(41.9)

Variables	Poor Quality of Sleep	Good Quality of Sleep	p**
Variables	Mean (SD) * Median	Mean (SD) * Median	p**
Medicine
Use of the computer
In 24 hours (hours)	2.6 (0.1) 2.0	2.4 (0.2) 2.0	0.24
During the night (hours)	1.9 (0.1) 2.0	1.6 (0.1) 2.0	0.04
Immediately before sleep (minutes)	28.0 (0.33) 15.0	16.2 (3.7) 0.0	<0.001
Use of the cell phone
In 24 hours (hours)	3.9 (0.3) 3.0	3.1 (0.3) 2.7	0.19
During the night (hours)	1.8 (0.1) 2.0	1.4 (0.1) 1.0	0.09
Immediately before sleep (minutes)	33.3 (2.8) 30.0	17.4 (2.4) 10.0	<0.001

Dentistry

Use of the computer
In 24 hours (hours)	2.1 (0.1) 2.0	1.9 (0.1) 2.0	0.35
During the night (hours)	1.7 (0.1) 2.0	1.5 (0.1) 1.2	0.39
Immediately before sleep (minutes)	21.9 (3.1) 0.0	14.4 (3.5) 0.0	0.03
Use of the cell phone
In 24 hours (hours)	5.3 (0.6) 4.0	6.0 (0.4) 4.0	0.93
During the night (hours)	2.5 (0.1) 2.0	2.7 (0.2) 3.0	0.90
Immediately before sleep (minutes)	40.5 (3.1) 30.0	37.3 (3.5) 30.0	0.33

Associação Médica Brasileira R. São Carlos do Pinhal, 324, 01333-903 São Paulo SP - Brazil, Tel: +55 11 3178-6800, Fax: +55 11 3178-6816 - São Paulo - SP - Brazil
E-mail: ramb@amb.org.br

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[1] CORRESPONDING AUTHOR: Ana Kluthcovsky Av. Carlos Cavalcanti, 4748, Departamento de Medicina, Ponta Grossa, PR, Brasil – 84030-900 E-mail: anafabio2009@gmail.com