School of Health and Related Research, University of Sheffield, UK.
School of Health and Related Research, University of Sheffield, UK.
Soc Sci Med. 2022 Sep;309:115227. doi: 10.1016/j.socscimed.2022.115227. Epub 2022 Aug 5.
This study examines the comparative equivalence, feasibility and acceptability of video and in-person interviews in generating time trade-off (TTO) values. Sample participants in England were recruited using a blended approach of different methods and sampled based on age, gender, ethnicity, and index of multiple deprivation. Participants were randomly allocated to be interviewed either via video or in-person. Participants completed TTO tasks for the same block of 10 EQ-5D-5L health states using the EQ-VTv2 software. Feasibility, acceptability and equivalence was assessed across mode using: sample representativeness; participant understanding, engagement and feedback; participant preferred mode of interview; data quality; mean utility and distribution of values for each health state; and regression analyses assessing the impact of mode whilst controlling for participant characteristics. The video and in-person samples had statistically significant differences in ethnicity and income but were otherwise broadly similar. Video interviews generated marginally lower quality data across some criteria. Participant understanding and feedback was positive and similar across modes. TTO values were similar across modes; whilst mean in-person TTO values were lower for the more severe states, mode was insignificant in most regression analyses. There was no clear preference of mode across all participants, though the characteristics of participants preferring to be interviewed in-person or by video differs. Video and in-person TTO interviews were feasible, acceptable and generated good-quality data, though video interviews had lower quality data across some criteria. Whilst TTO values differed across modes for the more severe states, mode does not appear to be the cause. The study found that the characteristics of people preferring each mode differed, and this should be taken into account in future valuation studies since sample representativeness for some characteristics, and therefore potentially TTO values, could be affected by the choice of mode.
本研究考察了视频和面对面访谈在生成时间权衡 (TTO) 值方面的比较等效性、可行性和可接受性。在英格兰，采用不同方法的混合方法招募了样本参与者，并根据年龄、性别、族裔和多重剥夺指数进行了抽样。参与者被随机分配通过视频或面对面进行访谈。参与者使用 EQ-VTv2 软件完成了相同的 10 个 EQ-5D-5L 健康状态的 TTO 任务。通过以下方式评估模式的可行性、可接受性和等效性：样本代表性；参与者的理解、参与和反馈；参与者首选的访谈模式；数据质量；每个健康状态的平均效用和价值分布；以及评估模式影响的回归分析，同时控制参与者特征。视频和面对面样本在族裔和收入方面存在统计学上的显著差异，但在其他方面基本相似。视频访谈在某些标准下产生了略微较低质量的数据。参与者的理解和反馈是积极的，且两种模式相似。TTO 值在两种模式下相似；虽然面对面 TTO 值对于更严重的状态较低，但在大多数回归分析中，模式并不重要。并非所有参与者都明显偏好某种模式，尽管偏好面对面或视频访谈的参与者的特征不同。视频和面对面 TTO 访谈是可行的、可接受的，并且生成了高质量的数据，尽管视频访谈在某些标准下的数据质量较低。虽然 TTO 值在两种模式下对于更严重的状态有所不同，但模式似乎不是原因。研究发现，人们对每种模式的偏好特征不同，这在未来的估值研究中应该考虑到，因为某些特征的样本代表性，因此潜在的 TTO 值，可能会受到模式选择的影响。
