Box 1.

Top level themes

	Patients	HCPs
Barriers to Diagnosis	Patient/HCP interaction AxSpA is difficult to diagnose Patient behaviour Lack of awareness of axSpA Sub-optimal practice in healthcare	AxSpA is difficult to diagnose Lack of awareness of axSpA Sub-optimal practice in healthcare Patient behaviour and characteristics Patient/HCP interaction
Facilitators of Diagnosis	Patient behaviour and advocacy Patient characteristics Good practice in healthcare Education and awareness Serendipity	Promoting awareness Symptoms and characteristics that could raise suspicion of axSpA Improving practice in healthcare