Table 2 Clinical characteristics of adult patients

Age (years, [SE])

55 years [13.2]

Sex

 Male

3 (50%)

 Female

3 (50%)

Race

 White/Caucasian

3 (50%)

 Asian

1 (17%)

 Other

2 (33%)

Primary indication for DL^a

Subglottic stenosis

3 (50%)

Tracheal stenosis

2 (33%)

Control patient^b

1 (16%)

History of past airway surgery

3 (50%)

Current tracheostomy

1 (17%)

Future airway interventions required

3 (50%)