Yield of conventional transbronchial needle aspiration (cTBNA) before and after introduction of endobronchial ultrasound.

<p>There was significant increase in the diagnostic yield of cTBNA after introduction of EBUS.</p

Comparison of spectrum of interstitial lung diseases in this study and a recently reported multicenter study from India.

<p>[<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0191938#pone.0191938.ref015" target="_blank">15</a>] The numbers represent percentage of subjects diagnosed with the condition.</p

Diagnostic yield before and after introduction of EBUS.

<p>In this analysis, the initial 100 cTBNA cases after introduction of EBUS are included in the after EBUS period and is further stratified based on the clinical diagnosis.</p

Baseline characteristics of the study subjects (n = 803).

<p>Baseline characteristics of the study subjects (n = 803).</p

Clinical and lymph node characteristics of the patients (n = 1050).

<p>Clinical and lymph node characteristics of the patients (n = 1050).</p

Multivariate analysis of diagnostic yield of conventional transbronchial needle aspiration (cTBNA).

<p>Multivariate analysis of diagnostic yield of conventional transbronchial needle aspiration (cTBNA).</p

Learning curve of transbronchial needle aspiration (TBNA) over a 10-year period.

<p>The proportion of representative lymph node sampling as well as diagnostic yield has increased over time.</p

Final diagnoses of study subjects.

<p>Final diagnoses of study subjects.</p

Comparison of diagnosis of incident and prevalent cases.

<p>Comparison of diagnosis of incident and prevalent cases.</p

Spectrum of diffuse parenchymal lung diseases in previous studies.

<p>Spectrum of diffuse parenchymal lung diseases in previous studies.</p