Crowdsourcing utility estimation for spina bifida in the general population

Establishing the first community-centered Spina Bifida research agenda

INTRODUCTION

Spina bifida (SB) is the most common permanently disabling congenital defect. In 2016, the Spina Bifida Association (SBA) began updating the Guidelines for the Care of People with Spina Bifida (Guidelines). These Guidelines identified over 250 research gaps for the care of individuals with SB. The community of people living with SB prioritized these research gaps to create a formal research agenda that the SBA could support.

OBJECTIVE

To present the process and the final research agenda created by individuals with SB, their care partners, clinicians, and researchers.

DESIGN

A quantitative survey was developed to allow adults with SB and caregivers of those with SB to rank the impact of each of the 27 topical areas of the Guidelines. The survey was sent via SBA's database to English and Spanish-literate individuals. 1607 responses were captured and analyzed. Two focus groups were convened after survey analysis: adults with SB and caregivers of children with SB. Discussion outlines for the focus groups were developed based on the results from the survey and were used for known-group validation of the highest-ranked topics. The SBA then solicited caregivers of those with SB, adults with SB, and clinical communities to join its initial Research Advisory Council (RAC). Each group generated a list of top research questions to address the gaps in these highest-ranked impact areas. The SBA led discussion groups for each topic area to rank the proposed questions in order of importance to the SB community. They provided content validity and revisions to the language to improve interpretation by the SB community. The final SB Research Agenda was created from the final four to six ranked questions in each of the six topics.

RESULTS

A ranking of findings from the quantitative survey identified the two most common topics impacting adults with SB and caregivers of both children and adults with SB were bowel incontinence and urinary incontinence.

CONCLUSION

A Research Agenda for SB was rigorously created to prioritize topic areas of highest impact as ranked by individuals in the SB community to fill the research gaps identified in the Guidelines. Bowel and urinary incontinence, both often treated by urologists, were ranked at the top. This agenda will be used to prioritize research efforts to improve the health of those with SB.

Utility estimation for neurogenic bowel dysfunction in the general population

BACKGROUND

Neurogenic bowel dysfunction (NBD) affects over 80% of individuals with spina bifida causing bowel incontinence and/or constipation. NBD is also associated with decreased quality of life, depression, anxiety, and decreased employment/educational attainment. Because NBD is a life-altering condition without a cure, understanding the utility of different health states related to NBD would aid clinicians as they try to counsel families regarding management options and to better understand the quality of life associated with disease management.

OBJECTIVE

To elicit utility scores for NBD using an online community sample.

STUDY DESIGN

A cross-sectional anonymous survey was completed by 1534 voluntary participants via an online platform (Amazon Mechanical Turk (MTurk, http://www.mturk.com/)), representing an 87% response rate. The survey presented hypothetical scenarios that asked respondents to imagine themselves as an individual living with NBD or as the caretaker of a child with NBD. The time trade-off (TTO) method was used to estimate a utility score, and outcomes for each scenario were calculated using median and IQR. Univariate comparisons of distributions of TTO for demographic data were made using Kruskal-Wallis tests.

RESULTS

The median utility score for NBD was 0.84 [0.70-0.92]. Participants reported that they would give up a median of 5 years of their own life, to prevent NBD in themselves of their child. Utility values for child scenarios were significantly different when stratified by age, gender, race, parental status, marital status, and income. Stratification by current health status did not yield significantly different utility values.

DISCUSSION

Study findings are comparable with other TTO-determined utility values of moderately severe disease states, including severe persistent asthma (0.83), moderate seizure disorder (0.84) and mild mental retardation (0.84). The significant variations in utility values based on age, gender, race, parent status, partner/marital status and income variables existed in our study, which is similar to findings in other health fields. Study limitations include lack of unanimous agreement about TTO's validity in measuring utility values, and MTurk participant reports can be generalized to greater population.

CONCLUSION

NBD is perceived by the community as having a substantial impact on the lives of children with spina bifida, representing a 16% reduction from perfect health. In general, health state utilities have been increasingly used in healthcare systems to understand how burdensome a population perceives a disease is and to evaluate whether interventions improve quality of life years.