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Table 1 Comparison of the Demographic Characteristics and Comorbidities between Patients with and without Primary insomnia

From: Risk of dementia in patients with primary insomnia: a nationwide population-based case-control study

 

Patients With primary insomnia

Comparison Patients

 

(N = 51,743)

(N = 258,715)

Characteristic

N

%

N

%

P

Sex

    

1.0000a

 Male

20,878

40.35

104,390

40.35

 

 Female

30,865

59.65

154,325

59.65

 

Age, mean ± SD

47.39 ± 15.69

 

47.39 ± 15.69

 

1.0000b

Year

    

1.0000a

39

17,637

34.09

88,185

34.09

 

 40–59

22,081

42.67

110,405

42.67

 

 60–74

8890

17.18

44,450

17.18

 

  ≥ 75

3135

6.06

15,675

6.06

 

Geographic region

    

<.0001a

 Northern

22,354

43.20

123,645

47.79

 

 Central

14,241

27.52

53,729

20.77

 

 Southern

12,622

24.39

68,637

26.53

 

 Eastern

1194

2.31

6362

2.46

 

 Missing

1332

2.57

6342

2.45

 

Comorbidities

 diabetes

4267

8.25

16,750

6.47

<.0001a

 dyslipidemia

4465

8.63

15,656

6.05

<.0001a

 hypertension

9538

18.43

35,067

13.55

<.0001a

 coronary heart disease

3803

7.35

11,824

4.57

<.0001a

 chronic liver disease

5597

10.82

16,630

6.43

<.0001a

 chronic kidney disease

1636

3.16

5069

1.96

<.0001a

  1. SD standard deviation; a chi-square test; b t-test