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Table 1 Baseline characteristics

From: Clostridium difficile infection health disparities by race among hospitalized adults in the United States, 2001 to 2010

Demographic Overall (n = 1,676,903) White (n = 1,503,189) Black (n = 173,714) P-Valuea
Age (years), median (IQR) 75 (61–83) 76 (63–83) 65 (50–78) <0.0001
Age ≥65 years, % 71 73 50 <0.0001
Female sex, % 59 59 58 <0.0001
Geographic region, % <0.0001
 Northeast 32 33 28
 Midwest 18 18 15
 South 37 35 49
 West 13 14 8
Hospital size, % <0.0001
 6–99 beds 20 21 12
 100–199 beds 23 24 11
 200–299 beds 23 23 21
 300–499 beds 21 21 31
 500+ beds 13 11 25
Hospital ownership, % <0.0001
 Proprietary 14 15 11
 Government 10 9 15
 Nonprofit 76 76 74
Principal payment source, % <0.0001
 Medicare 69 71 58
 Medicaid 6 5 17
 Private 21 21 19
 Self-pay 2 1 3
 Other 2 2 3
Admission type, % <0.0001
 Emergency 67 65 78
 Urgent 20 21 16
 Elective 13 14 6
Admission source, % <0.0001
 Emergency room 59 59 67
 Transfer 16 16 13
 Referral 17 17 14
 Other 8 8 6
Selected principal diagnoses, %  
Clostridium difficile infection 32 32 31 <0.0001
 Pneumonia 4 5 3 <0.0001
 Urinary tract infection 3 2 5 <0.0001
 Cancer 3 3 3 <0.0001
 Congestive heart failure 2 2 2 <0.0001
 COPD 2 2 1 <0.0001
 Myocardial infarction 1 1 1 0.0294
 Diabetes 1 1 2 <0.0001
 Cerebrovascular disease 1 1 2 <0.0001
 HIV <1 <1 2 <0.0001
  1. IQR interquartile range, COPD chronic obstructive pulmonary disease, HIV human inmmunodeficiency virus
  2. a P-values reflect comparisons between white and black patients