• Justin Durham, Catherine Exley, Mike T John, and Donald R Nixdorf.
• Newcastle University, Newcastle-Upon-Tyne, UK. Justin.Durham@ncl.ac.uk
• J Orofac Pain. 2013 Jan 1;27(1):6-13.

AimsTo build an understanding of the patient's experience and from this identify recurring themes that could form part of an item pool for further testing of persistent dentoalveolar pain disorder (PDAP).MethodsProven cases of PDAP were identified from a clinical database, and a purposive maximum variation sample was drawn. Semi-structured interviews were conducted with the sample by a single trained interviewer. Interviews were digitally recorded and transcribed verbatim. Data collection and analysis occurred until data saturation (n = 20), with no new themes emerging. Analysis of the data was an iterative and inductive process broadly following the principles of the constant comparative method.ResultsRecurrent themes emerging from the data were: difficulty in responding to history taking; duration and magnitude of pain; complex and confounding descriptors; common exacerbating factor; well-localized pain; deep pain; pressurized or pressure feeling.ConclusionSeveral common experiences that can be considered items were identified in the data. These items will add to the limited pre-existing item pool in the literature and allow testing of this item pool to determine those items best suited to form an adjunctive self-report diagnostic instrument for PDAP.

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