Interpreting Respiratory Oscillometry in Adult Asthma and COPD: a Delphi Study

This is an international Delphi study to consolidate expert consensus on the use of respiratory oscillometry in the management of adult patients with asthma or chronic obstructive pulmonary disease (COPD). The primary objective of the Delphi study is to aid the interpretation of respiratory oscillometry in clinical practice amongst adult patients with asthma or COPD. This will be achieved by obtaining expert consensus on: * Which parameters are used in clinical practice for impulse oscillometry (IOS) and for forced oscillation technique (FOT) devices. * What cut-offs can be used for each parameter to guide clinical practice in the management of adult patients with asthma and COPD. This study is based on the Delphi methodology. The Delphi study will comprise of four rounds, one brainstorming round, to formulate the consensus survey, and three rounds to attempt to obtain consensus. In each round a questionnaire comprising of statements and questions regarding respiratory oscillometry will be sent to participants in the Delphi study electronically using SurveyLet, an online survey platform. Participants will respond anonymously to the survey questions, indicating their level of agreement or disagreement with each statement or question. Participants will be given 4 weeks to complete each round of the Delphi study. Questions and statements will be repeated in subsequent rounds until the predefined level of consensus is met or the maximum number of rounds is achieved (limited to a maximum of 3 rounds). Aggregated results for each statement or question, including distribution of results and consensus status, will be provided to participants after each round to facilitate informed decisions in subsequent rounds.