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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
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