The development of the ICECAP-A measure is detailed in:
Al-Janabi H, Flynn T, Coast J. (2012) Development of a self-report measure of capability wellbeing for adults: the ICECAP-A. Quality of Life Research 21: 167-176 (DOI: 10.1007/s11136-011-9927-2).
UK index values for the ICECAP-A are presented in:
Flynn TN, Huynh E, Peters TJ, Al-Janabi H, Moody A, Clemens S, Coast J. Scoring the ICECAP-A capability instrument. Estimation of a UK general population tariff. Health Economics. Online first: doi: 10.1002/hec.3014
Evidence about reliability, validity and feasibility of use can be found in:
Baji P, Farkas M, Dobos A, Zrubka Z, Gulácsi, L, Brodszky V, Rencz F & Péntek M. 2020 “Capability of well-being: validation of the Hungarian version of the ICECAP-A and ICECAP-O questionnaires and population normative data”. Quality of Life Research. https://doi.org/10.1007/s11136-020-02542-1
Al-Janabi H, Peters TJ, Brazier J, Bryan S, Flynn TN, Clemens S, Moody A, Coast J. (2013) An investigation of the construct validity of the ICECAP-A capability measure. Quality of Life Research. 22: 1831-1840 (doi: 10.1007/s11136-012-0293-5)
Al-Janabi H, Keeley T, Mitchell P, Coast J. (2013) Can capabilities be self-reported? A think-aloud study. Social Science and Medicine. 87: 116-122
Keeley T, Al-Janabi H, Lorgelly P & Coast J. (2013) A Qualitative Assessment of the Content Validity of the ICECAP-A and EQ-5D-5L and Their Appropriateness for Use in Health Research. PLoS ONE 8(12)
Mitchell P, Al-Janabi H, Richardson J, Lezzi A, Coast J. (2015) “The Relative Impacts of Disease on Health Status and Capability Wellbeing: A Multi-Country Study” PLOSOne, 1371/journal.pone.0143590
Goranitis, I., Coast, J., Al-Janabi, H., Latthe, P., & Roberts, T. E. (2016). The validity and responsiveness of the ICECAP-A capability-well-being measure in women with irritative lower urinary tract symptoms. Quality of Life Research, 25(8), 2063–2075.
Keeley, T., Al-Janabi, H., Nicholls, E., Foster, N., Jowett, S., & Coast, J. (2015). A longitudinal assessment of the responsiveness of the ICECAP-A in a randomised controlled trial of a knee pain intervention. Quality of Life Research, 24(10), 2319–2331.
Keeley, T., Coast, J., Nicholls, E., Foster, N. E., Jowett, S., & Al-Janabi, H. (2016).An analysis of the complementarity of ICECAP-A and EQ-5D-3 L in an adult population of patients with knee pain. Health and Quality of Life Outcomes, 14(1), 1–5.
Linton MJ, Mitchell PM, Al-Janabi H, Schlander M, Richardson J, Lezzi A, Ubels J, Coast J. (2018) ‘Comparing the German Translation of the ICECAP-A Capability Wellbeing Measure to the Original English Version: Psychometric Properties across Healthy Samples and Seven Health Condition Groups’. Applied Research in Quality of Life, https://doi.org/10.1007/s11482-018-9681-5