Frequency of Common Medical Conditions in People With and Without HHT

To capture large sufficiently large numbers of individuals for appropriate statistical power (see below), a web based questionnaire design was considered the most appropriate tool. SurveyMonkey was identified as the most suitable means to generate the questionnaire, facilitate confidential answers by the target populations, and for analysis of questionnaire data. The designed survey can also be presented in paper format, and used in our clinical service.