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Table 2 Incidence rate ratio of TB according to selected socio-demographic characteristics in Michigan, 2004–2012

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

Variable Clustered cases Non-clustered cases
N IRR (95% CI) N IRR (95% CI)
  479   775  
Race
 White 107 Ref. 312 Ref.
 Black 296 24.6 (15.5, 38.8) 229 7.7 (5.3, 11.1)
 Asian 76 18.6 (10.5, 32.9) 234 23.5 (16.3, 35.8)
Nativity
 U.S.-born 359 Ref. 335 Ref.
 Foreign-born 117 10.0 (6.6, 15.2) 440 7.0 (5.0, 9.8)
 3 missing     
Gender
 Male 313 Ref. 437 Ref.
 Female 166 0.61 (0.41, 0.91) 338 0.74 (0.54, 1.0)
Age
 18–64 Years 414 Ref. 525 Ref.
 65+ Years 65 0.83 (0.54, 1.3) 250 2.6 (1.9, 3.5)
  1. Classifications of race, age, gender, nativity, and site of TB disease were defined based on Report of Verified Case of TB form developed by the Centers for Disease Control and Prevention
  2. Models based on multivariable negative binomial regression models
  3. Clustered and non-clustered cases were modeled separately with all four demographic characteristics included in models: race, nativity, gender, and age
  4. IRR incidence rate ratio
  5. Ref. reference group