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Table 6 Quality assessment of BIVI-IQ using the modified quality assessment tool for evaluation of PROMs from Hepworth et al. (2015) [12]

From: Development of a patient reported outcome measures for measuring the impact of visual impairment following stroke

Quality criteria Definition BIVI-IQ
Pre-study hypothesis The pre-study specification of the aim of the instrument and the intended population √√ A clear description is provided of the aim of the instrument and the intended population
Intended population The extent to which the instrument has been studied in the intended population √√ Intended population studied
Actual content area The extent to which the content meets the pre-study hypothesis specifications √√ Content is intended and is relevant to the intended population
Item identification Selection of the items relevant to the target population for inclusion in the pilot instrument √√ Comprehensive consulting with patients (focus groups or in-depth interviews) and a literature review
Item selection Determining the items included in the final instrument √√ A pilot instrument was developed and tested with Rasch or factor analysis and statistical justification provided for removing items, plus items with floor and ceiling effects removed and the amount of missing data considered
Scoring A description of how the instrument should be scored √√ Rasch scoring of a statistically justified response scale
Views of stroke patients considered The percentage of stroke patients involved in item identification during the development of PROMs Less than 50% of stroke patients were involved in the consultation with patients in the item identification
Stroke population The extent to which the instrument has been studied in a stroke population √√ Stroke population studied
  1. √√ positive rating; minimal acceptable rating; X negative rating