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