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Table 1 Demographic status and comorbidity compared between cohorts with and without COPD

From: Increased risk and related factors of depression among patients with COPD: a population-based cohort study

Variables Non-COPD COPD p
  N = 38010 N = 38010  
Age, years n (%) n (%)  
<50 11209 (29.5) 11097 (29.2) 0.3245
50–69 14515 (38.2) 14436 (38.0)  
≥70 12286 (32.3) 12477 (32.8)  
mean (SD) 59.0 (17.1) 59.2 (17.0) 0.1365
Gender    1.0000
Female 16344 (43.0) 16344 (43.0)  
Male 21666 (57.0) 21666 (57.0)  
Monthly income    <0.0001
Low 16787 (44.2) 16338 (43.0)  
Median 19109 (50.3) 19757 (52.0)  
High 2114 (5.60) 1915 (5.00)  
Level of urbanization    <0.0001
Urban 21149 (55.9) 20479 (54.1)  
Suburban 12327 (32.6) 12465 (32.9)  
Rural 4373 (11.6) 4919 (13.0)  
Comorbidity    
Hypertension 10565 (27.8) 15190 (40.0) <0.0001
Arthritis 6390 (16.8) 9799 (25.8) <0.0001
Diabetes 4474 (11.8) 6027 (15.9) <0.0001
Heart disease 6473 (17.0) 11871 (31.2) <0.0001
Chronic kidney disease 601 (1.60) 903 (2.40) <0.0001
Cancer 1591 (4.20) 2480 (6.50) <0.0001