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Table 5 Bivariate associations between Mycobacterium tuberculosis test type and other patient characteristics. Includes people initiating daily-dose isoniazid treatment (N = 1072)

From: Predictors of latent tuberculosis infection treatment completion in the US private sector: an analysis of administrative claims data

  Mycobacterium tuberculosis Test Type
Tuberculin Skin Test
[% or Mean]
Interferon-Gamma Release Assay
[% or Mean]
Other/ Unknown Test
[% or Mean]
p-value
Sex Female 42.1% 19.8% 38.1% 0.767
Male 40.0% 21.1% 38.8%  
Age Group 0–14 75.2% 8.6% 16.1% < 0.001
15–29 51.5% 11.0% 37.5%  
30–44 36.1% 20.9% 43.0%  
45–64 27.0% 31.3% 41.7%  
Census Region Northeast 46.6% 12.8% 40.6% 0.001
Midwest 36.8% 21.3% 41.9%  
South 41.9% 21.6% 36.5%  
West 37.9% 26.4% 35.7%  
Patient Location Large central metro county 41.1% 23.4% 35.5% 0.033
Large fringe metro county 44.1% 17.2% 38.7%  
Any smaller county 34.3% 20.0% 45.7%  
% of Households Under FPL in County < 15% 41.9% 20.8% 37.3% 0.672
≥15% 40.1% 20.0% 39.9%  
Insurance Type HMO 38.8% 13.3% 47.9% 0.015
POS 41.1% 22.5% 36.4%  
PPO 44.4% 19.0% 36.6%  
Prescription Size < 2 month supply 41.5% 20.0% 38.5% 0.428
≥2 month supply 37.0% 25.9% 37.0%  
Year INH Regimen Started 2011 Q3–4 49.1% 23.2% 38.7% 0.001
2012 Q1–4 36.2% 21.8% 42.0%  
2013 Q1–4 40.5% 24.9% 34.7%  
2014 Q1 54.4% 15.2% 30.4%  
State TB Rate 3.9 3.9 3.8 0.363
Percent Foreign Born in County 21.1 20.5 19.2 0.058
Count of Clinical Risk Factors None 46.8% 14.5% 38.7% < 0.001
1 36.8% 26.0% 37.2%  
2 or more 17.9% 41.5% 40.6%  
Diagnosis of Contact w/ TB No diagnosis 39.8% 20.6% 39.6% 0.058
Had diagnosis 49.7% 19.5% 30.9%  
History of TB/Late Effects No diagnosis 42.0% 20.2% 37.9% 0.031
Had diagnosis 22.2% 36.7% 51.1%  
HIV No diagnosis 42.4% 19.0% 36.5% < 0.001
Had diagnosis 9.5% 54.8% 35.7%  
Diabetes No diagnosis or medication 42.3% 19.8% 37.8% 0.010
Had diagnosis or medication 24.7% 28.8% 46.6%  
Tobacco No diagnosis or medication 42.1% 19.6% 38.3% 0.011
Had diagnosis or medication 26.5% 32.3% 41.2%  
Immunosuppressive Medications No medication 43.8% 16.7% 39.6% < 0.001
Had medication 21.0% 49.2% 29.8%  
  1. Abbreviations: INH isoniazid, FPL federal poverty level, TB tuberculosis, LTBI latent tuberculosis infection, HMO health maintenance organization, POS point of service, PPO preferred provider organization