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Table 1 Demographic and baseline clinical characteristics by insomnia status

From: Insomnia in chronic obstructive pulmonary disease and associations with healthcare utilization and costs

Characteristic

Insomnia

(n = 407,969)

No Insomnia

(n = 603,677)

Effect Sizea

Age (years), mean (SD)

65.6 (10.7)

70.3 (10.9)

0.44

Sex, male, n (%)

387,395 (94.9)

586,246 (97.1)

0.06

Race/Ethnicity, n (%)

  

0.06

White

308,410 (75.6)

462,047 (76.5)

 

Black

52,229 (12.8)

63,836 (10.6)

 

Hispanic

13,917 (3.4)

14,855 (2.5)

 

Other/Missing

33,413 (8.2)

62,939 (10.4)

 

Marital Status, n (%)

  

0.06

Married

203,047 (49.7)

313,258 (51.9)

 

Never married

167,807 (41.1)

217,098 (35.9)

 

Widowed/Divorced/Separated

36,455 (8.9)

710,264 (11.8)

 

Other/Missing

660 (0.2)

2,057 (0.3)

 

Current smoker, n (%)

207,076 (50.8)

247,855 (41.1)

0.10

Combat deployment, n (%)

43,381 (10.6)

56,057 (9.3)

0.02

Any Service connection, n (%)

246,566 (60.4)

266,034 (44.1)

0.16

VA service connection compensation, n (%)

  

0.19

None

149,069 (36.5)

317,967 (52.7)

 

< 50%

65,861 (16.1)

110,935 (18.4)

 

≥ 50%

180,761 (44.3)

155,254 (25.7)

 

Missing

12,278 (3.0)

19,521 (3.2)

 

BMI (kg/m2), mean (SD)

30.0 (7.1)

27.7 (6.2)

0.31

Any Comorbidity, n (%)

378,945 (92.9)

464,837 (77.0)

0.21

Select Comorbidities, n (%)

   

Obstructive sleep apnea

161,661 (39.6)

45,371 (7.5)

0.38

Gastroesophageal reflux disease

201,840 (49.5)

213,591 (35.4)

0.14

Restless legs syndrome

20,337 (4.9)

10,312 (1.7)

0.09

Asthma

31,513 (7.7)

29,642 (4.9)

0.06

Diabetes

184,343 (38.5)

205,013 (33.9)

0.11

Ischemic heart disease

184,852 (45.3)

240,723 (39.9)

0.05

Stroke

19,963 (4.9)

21,285 (3.5)

0.03

Human immunodeficiency virus

22,577 (5.5)

23,829 (3.9)

0.03

Depression

87,512 (21.5)

32,631 (5.4)

0.24

Anxiety

39,131 (9.6)

18,190 (3.0)

0.14

Post-traumatic stress disorder

129,897 (31.84)

62,753 (10.4)

0.26

  1. Definition of abbreviations: BMI = body mass index; SD = standard deviation, VA = Veterans Affairs
  2. a By Cramer’s V for categorical data and Cohen’s d for continuous data, as appropriate. Cramer’s V: >0.05 = weak, > 0.10 = moderate, > 0.15 = strong. Cohen’s d: 0.20 = small, 0.50 = medium, 0.80 = large