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Table 1 Basic demographic characteristics and sleep quality

From: Prevalence and correlates of poor sleep quality among college students: a cross-sectional survey

Variables

Total (n = 6284)

Cr

Good sleep quality (n = 4233)

Poor sleep quality (n = 1951)

OR

95%CI

p

Age

  ≤ 20

4550

72.4%

3106(68.3)

1444(31.7)

1.000

  

  > 20

1734

27.6%

1227(70.8)

507(29.2)

1.044

0.871–1.252

0.638

Gender

 Male

3310

52.7%

2284(69.0)

1026(31.0)

1.000

  

 Female

2974

47.3%

2049(68.9)

925(31.1)

1.017

0.888–1.166

0.804

Ethnicity

 Han

5737

91.3%

3955(68.9)

1782(31.1)

1.000

  

 Minority

547

8.7%

378(69.1)

169(30.9)

0.999

0.815–1.225

0.993

BMI (kg/m2)

  < 18.5

1158

18.5%

813(70.2)

345(29.8)

1.000

 

0.228

 18.5–23.9

4054

64.5%

2785(68.7)

1269(31.3)

0.769

0.588–1.005

0.055

 24–27.9

774

12.3%

543(70.2)

231(29.8)

0.825

0.645–1.056

0.127

  ≥ 28

298

4.7%

192(64.4)

106(35.6)

0.771

0.581–1.022

0.071

Grade

 Freshman

2586

41.2%

1755(67.9)

831(32.1)

1.000

 

0.002

 Sophomore

1966

31.3%

1337(68.0)

629(32.0)

0.873

0.760–1.002

0.054

 Junior

1072

17.0%

759(70.8)

313(29.2)

0.677

0.550–0.834

< 0.001

 Senior and senior five

660

10.5%

482(73.0)

178(27.0)

0.663

0.508–0.866

0.003

Monthly family income per capita (¥)

  < 3000

2909

46.3%

1974(67.9)

1974(32.1)

1.000

 

0.901

 3000–4999

1916

30.5%

1343(70.1)

1343(29.9)

1.029

0.891–1.188

0.695

 5000–6999

842

13.4%

589(70.0)

589(30.0)

1.005

0.830–1.217

0.961

  ≥ 7000

617

9.8%

427(69.2)

427(30.8)

1.085

0.864–1.362

0.481

Monthly living expenses (¥)

  < 1000

2036

32.4%

1367(67.1)

669(32.9)

1.000

 

0.087

 1000–2000

3646

58.0%

2537(69.6)

1109(30.4)

0.874

0.762–1.004

0.057

 2001–3000

467

7.4%

338(72.4)

129(27.6)

0.829

0.636–1.082

0.168

  > 3000

135

2.1%

91(67.4)

44(32.6)

1.245

0.796–1.947

0.336

  1. Note: Cr, Constituent ratio; ¥1000 = $141