The conjoint analysis technique was used to elicit participants’ preferences in terms of the alternative options. This technique has been widely used for market research purposes since the 1970s and has gained relative prominence in the field of health care research in recent years . The main advantage of this method is that participants are invited to consider several attributes or criteria concurrently and are thus facilitated to compromise and make trade-offs to reach a decision. In this way, the relative importance and the usefulness of each criterion can be elicited . The conjoint analysis is based on preference judgements and allows for calculating the usefulness of each attribute and its various levels [6, 34].