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Table 4 Frequency distribution of evidence of latent tuberculosis infection (LTBI) testing occurring in the 6 months prior to LTBI treatment initiation with isoniazid (n = 1072)

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

Broad Categorization Used in Statistical Models N % 95% Confidence Interval Detailed Categorization N % 95% Confidence Interval
TST 441 41.1% 38.2% 41.1% TST procedure code only, or TST code temporally first 441 41.1% 38.2% 44.1%
IGRA 219 20.4% 18.1% 23.0% IGRA procedure code only, or IGRA code temporally first 219 20.4% 18.1% 23.0%
Other/Unknown 412 38.4% 35.6% 41.4% IGRA & TST procedure codes present on same day 2 0.2% 0.0% 0.7%
Other test for MTB occurred based on procedure code (no TST or IGRA code) 5 0.5% 0.2% 1.1%
No procedure code provided information about testing, but a diagnosis code indicated that screening occurred 31 2.9% 2.0% 4.1%
No procedure code or diagnosis code regarding testing was present, but an LTBI diagnosis code was present 261 24.4% 21.9% 27.0%
Neither LTBI testing procedure nor diagnosis information regarding LTBI was present 113 10.5% 8.8% 12.3%