PMC10381030_01
Feedback scores from respondents completing the discrete choice experiment (DCE) and swing-weighting (SW).. White = Ease of understanding the DCE; Light grey = Ease of answering the DCE; Dark grey = Ease of understanding the SW; Black = Ease of answering the SW; Respondents answered on a scale from 1 to 6, 1 being the most difficult and 6 being the easiest; Low health numeracy scored below 9.83 (the mean) on the SNS-3; High health numeracy scored above 9.83 (the mean) on the SNS-3; Health literacy questions are scored 1-5 with the middle question inversed:Low health literacy identified by a score of >3 on any item; High health literacy scored <2 on any item (see Louis et al, 2016).
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Overall, the DCE was reported by participants to be both easier to understand and to complete, compared to the SW (Fig 2).
Proportion of attribute importance relative to sum of all attributes' importance (DCE and SW calculated through both ROC and PA.. DCE = discrete choice experiment; SW = swing weighting; PA = point allocation; ROC = rank order centroid method.
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For the DCE, the proportion of attribute importance is very different for all the attributes (Fig 3). Fig 3). Fingerprick frequency was the most important attribute (mean = 0.18; s.d. = 0.11), followed by cost (mean = 0.17; s.d. = 0.13), with alarm being the least important attribute (mean = 0.11; s.d. = 0.11). The ROC method for determining weights still achieved very little difference in the relative weights given to the seven attributes, (Fig 3).