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Table 1 Comparison of the distribution of selected demographic and clinical characteristics among those cases included in the study sample to those cases excluded from the study sample

From: Race and nativity are major determinants of tuberculosis in the U.S.: evidence of health disparities in tuberculosis incidence in Michigan, 2004–2012

Risk factor Study sample (n = 1254) Excluded from study sample (n = 546) P-Value
N % N %
Race
 White 419 33.4 199 36.5 <0.0001
 Black/African American 525 41.9 196 35.9  
 Asian 310 24.7 118 21.6  
 American Indian/Alaskan Native    5 0.92  
 Native Hawaiian or Other    14 2.6  
 Unknown    11 2.0  
 Missing    3 0.55  
Age groups (years)
 <18    124 22.7 <0.0001
 18–64 939 74.9 324 59.3  
 65+ 315 25.1 98 18.0  
Gender      
 Male 750 59.8 297 54.4 0.04
 Female 504 40.2 248 45.4  
 Missing    1 0.18  
Nativity
 Foreign-born 557 44.4 241 44.1 0.58
 US-born 694 55.3 302 55.3  
 Missing 3 0.24 3 0.55  
Site of disease
 Pulmonary 880 70.3 308 56.4 <0.0001
 Extrapulmonary 275 22.0 188 34.4  
 Both 97 7.8 46 8.4  
 Missing 2   4 0.73  
  1. Classifications of race, age, gender, nativity, and site of TB disease were defined based on the Report of Verified Case of TB form developed by the Centers for Disease Control and Prevention
  2. P-values are based on the chi-squared test