Table 1

Number of items, words, Flesch-Kincaid Grade and reading age of questionnaires

InstrumentNo of itemsWord countFlesch-Kinkaid GradeReading age
Health Confidence Score4502.88
Health Literacy Questionnaire4410017.212
ICECAP-A52815.210
My Health Confidence2834.810
Patient Activation Measure (PAM-13)132998.213
Patient Health Engagement Scale51445.110
Stanford self-efficacy for managing chronic disease 6-item scale (Stanford 6)62128.514