Table 1 Distribution of the studied nurses according to demographic data (n = 745)

Age (years)

 < 30

313

42.0

 30–40

219

29.4

 41–50

156

20.9

 > 50 y

57

7.7

 Mean ± SD

35.39 ± 9.46

Sex

 Male

615

82.6

 Female

130

17.4

Unit

 Surgical

316

42.4

 Medical

227

30.5

 ICU

202

27.1

Qualification

 Nursing school diploma

288

38.7

 Technical nursing institute

191

25.6

 Bachelor of nursing science

266

35.7

Years’ experience of nursing

 < 5

112

15.0

 5–10

205

27.5

 11–20

217

29.1

 > 20

211

28.3

 Mean ± SD

14.24 ± 8.73

Years’ experience of unit

 < 5

446

59.9

 5–10

188

25.2

 11–20

37

5.0

 > 20

74

9.9

 Mean ± SD

6.61 ± 7.14

Shift

 Fixed morning

211

28.3

 Rotating morning and evening

184

24.7

 Rotating morning and evening and night

188

25.2

 Fixed night

162

21.7