Patient and healthy volunteers characteristics
| Patients (n=48) | Volunteers (n=11) | P value | |
| Age at MRI (years) | 14.4 (range 7.5–30.7) | 15.9 (range 8.2–28.8) | 0.92 |
| Gender (n/% female) | 25/52.1 | 4/36.4 | 0.37 |
| Weight (kg) | 45.2 (IQR 34.5–62.3) | 60.8 (IQR 31.6–74.0) | 0.34 |
| Height (metre) | 1.6 (IQR 1.4–1.7) | 1.7 (IQR 1.4–1.8) | 0.34 |
| Type of stenosis (n/%) | |||
| Congenital | 3/6.3 | ||
| Acquired | 45/93.8 | ||
| Cotton Myer grade of stenosis (n/%) | |||
| Grade I | 4/8.3 | ||
| Grade II | 15/31.3 | ||
| Grade III | 27/56.3 | ||
| Grade IV | 2/4.2 | ||
| Location of stenosis (n/%) | |||
| Posterior glottis | 11/22.9 | ||
| Subglottis | 17/35.4 | ||
| Posterior glottis and subglottis | 20/41.7 | ||
| Tracheal cannula before repair (n/%) | 38/79.2 | ||
| Type of reconstruction (n/%) | |||
| ss-LTR | 42/87.5 | ||
| ds-LTR | 2/4.2 | ||
| CTR | 4/8.3 | ||
| Age at reconstruction (years) | 2.2 (IQR 1.1–4.5) | ||
| Years since reconstruction | 11.5±4.6 | ||
| Comorbidities (n/%) | Asthma 2/4.2 | ||
| BPD 9/18.8 | |||
| Cardiac 3/6.3 | |||
| DiGeorge syndrome 1/2.1 | |||
| Oesophageal atresia 3/6.3 | |||
| Kartagener syndrome 1/2.1 | |||
| OSAS 1/2.1 | |||
| PMR 6/12.5 | |||
| Tracheomalacia 2/4.2 |
Descriptive statistics. Data are presented as mean±SD, median (range or IQR) or absolute number (n) and percentage.
BPD, bronchopulmonary dysplasia; CTR, cricotracheal resection; ds-LTR, double stage laryngotracheal reconstruction; OSAS, obstructive sleep apnoea syndrome; PMR, psychomotor retardation; ss-LTR, single-stage laryngotracheal reconstruction.