FIGURE 2.

The diagnostic investigations and outcomes of patients seen a) at the diagnostic centre at University Hospital Southampton (UHS) or b) having had samples sent by courier to UHS from a satellite respiratory clinic. Patients were diagnosed as primary ciliary dyskinesia (PCD)-positive, PCD-negative or valid-inconclusive (VI). Invalid-inconclusive (II) results due to inadequate samples or data are shown, but were subsequently excluded from accuracy analyses. Diagnostic tests included nasal nitric oxide (nNO), high-speed video microscopy analysis (HSVMA) and transmission electron microscopy (TEM).