Key results from multiple breath washout (MBW) training, certification and data quality control in bronchiectasis research settings
| Knowledge and confidence with MBW testing was increased with the training programme |
| 68% of sites completed certification within 6 months |
| Most common barriers to completing MBW certification in bronchiectasis sites were the lack of time and available volunteers to practice testing |
| Success rates were 79% (Clinimetrics study) and 58% (i-BEST-1 study) |
| In the Clinimetrics study, there was no difference in age (p=0.10) or disease severity (p=0.90) as measured by forced expiratory volume in 1 s (at baseline) in those subjects with successful versus those with failed test sessions |
| In the i-BEST-1 study, longer times to certification, a higher percentage of naïve sites and patients with worse lung function may have contributed to the lower success rate |
| Combination of success rate data from both studies showed that success rates were higher in non-naïve sites (81%) compared to naïve sites (66%) |