The use of exploratory analyses within the National Institute for Health and Care Excellence single technology appraisal process: an evaluation and qualitative analysis

Author:

Kaltenthaler Eva1,Carroll Christopher1,Hill-McManus Daniel1,Scope Alison1,Holmes Michael1,Rice Stephen2,Rose Micah3,Tappenden Paul1,Woolacott Nerys4

Affiliation:

1. School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, UK

2. Health Economics Group, Newcastle University, Newcastle upon Tyne, UK

3. Southampton Health Technology Assessments Centre (SHTAC), University of Southampton, Southampton, UK

4. Centre for Reviews and Dissemination (CRD), University of York, York, UK

Abstract

BackgroundAs part of the National Institute for Health and Care Excellence (NICE) single technology appraisal (STA) process, independent Evidence Review Groups (ERGs) critically appraise the company submission. During the critical appraisal process the ERG may undertake analyses to explore uncertainties around the company’s model and their implications for decision-making. The ERG reports are a central component of the evidence considered by the NICE Technology Appraisal Committees (ACs) in their deliberations.ObjectiveThe aim of this research was to develop an understanding of the number and type of exploratory analyses undertaken by the ERGs within the STA process and to understand how these analyses are used by the NICE ACs in their decision-making.MethodsThe 100 most recently completed STAs with published guidance were selected for inclusion in the analysis. The documents considered were ERG reports, clarification letters, the first appraisal consultation document and the final appraisal determination. Over 400 documents were assessed in this study. The categories of types of exploratory analyses included fixing errors, fixing violations, addressing matters of judgement and the ERG-preferred base case. A content analysis of documents (documentary analysis) was undertaken to identify and extract relevant data, and narrative synthesis was then used to rationalise and present these data.ResultsThe level and type of detail in ERG reports and clarification letters varied considerably. The vast majority (93%) of ERG reports reported one or more exploratory analyses. The most frequently reported type of analysis in these 93 ERG reports related to the category ‘matters of judgement’, which was reported in 83 (89%) reports. The category ‘ERG base-case/preferred analysis’ was reported in 45 (48%) reports, the category ‘fixing errors’ was reported in 33 (35%) reports and the category ‘fixing violations’ was reported in 17 (18%) reports. The exploratory analyses performed were the result of issues raised by an ERG in its critique of the submitted economic evidence. These analyses had more influence on recommendations earlier in the STA process than later on in the process.LimitationsThe descriptions of analyses undertaken were often highly specific to a particular STA and could be inconsistent across ERG reports and thus difficult to interpret.ConclusionsEvidence Review Groups frequently conduct exploratory analyses to test or improve the economic evaluations submitted by companies as part of the STA process. ERG exploratory analyses often have an influence on the recommendations produced by the ACs.Future workMore in-depth analysis is needed to understand how ERGs make decisions regarding which exploratory analyses should be undertaken. More research is also needed to fully understand which types of exploratory analyses are most useful to ACs in their decision-making.FundingThe National Institute for Health Research Health Technology Assessment programme.

Funder

Health Technology Assessment programme

Publisher

National Institute for Health Research

Subject

Health Policy

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