Table 4 Factors associated with poor sleep quality among prisoners of Diredawa correctional facility, Diredawa, Eastern Ethiopia, 2017 (n = 421)

Age in years

≤ 19

8 (28.6)

20 (71.4)

1

1

20–39

175 (56)

137 (44)

3.19 (1.36,7.47)

1.27 (0.18,9.11)

40–59

37 (52.8)

33 (47.2)

2.80 (1.09,7.21)

0.51 (0.05,4.82)

≥ 60

7 (63.6)

4 (36.4)

4.37 (0.99,19.16)

0.51 (0.04,7.31)

Education

Illiterate

26 (54.2)

22 (45.8)

1

1

Grade 1–8

91 (55.5)

73 (44.5)

1.53 (0.73,3.27)

1.31 (0.38,4.50)

Grade 9–12

83 (56.5)

64 (43.5)

1.62 (0.89,2.91)

1.03 (0.29,3.56)

Diploma and above

27 (43.5)

35 (56.5)

1.68 (0.92,3.06)

0.61 (0.13,2.85)

Depression

No

47 (30.3)

108 (69.7)

1

1

Yes

180 (67.7)

86 (32.3)

4.81 (3.13,7.38)

3.47 (1.38,8.76)**

Cigarette smoking

No

91 (40)

136 (60)

1

1

Yes

129 (66.5)

65 (33.5)

2.97 (1.43,8.19)

2.16 (1.21,5.58)*

Other substance

No

111 (30)

259 (70)

1

1

Yes

39 (76.5)

12 (23.5)

7.6 (1.21, 17.85)

5.02 (1.63,15.46)**

Coffee

No

45 (27.9)

116 (70.1)

1

1

Yes

156 (60)

104 (40)

3.87 (1.68,10.93)

2.75 (1.37,7.05)*

Sleep hygiene

Good

51 (32.3)

107 (67.7)

1

1

Poor

176 (66.9)

87 (30.1)

4.24 (2.79,6.47)

3.19 (1.32,7.69)**

Crime type

Theft

24 (37.5)

40 (62.5)

1

1

Murder

30 (46.9)

34 (53.1)

1.47 (0.73,2.98)

0.77 (0.19,3.08)

Fraud

41 (56.2)

32 (43.8)

2.14 (1.08,4.24)

2.15 (0.66,7.06)

Assault

37 (55.2)

30 (44.8)

2.06 (1.52,4.13)

4.12 (1.29,10.63)*

Rape

43 (71.7)

17 (28.3)

4.22 (1.98,8.98)

5.57 (1.45, 13.89)*

Others

52 (55.9)

41 (44.1)

2.11 (1.10,4.05)

1.39 (0.46,4.19)