Development of an item bank and computer adaptive test for role functioning

TY - JOUR

T1 - Development of an item bank and computer adaptive test for role functioning

AU - Anatchkova, Milena D

AU - Rose, Matthias

AU - Ware, John E

AU - Bjørner, Jakob

PY - 2012/11

Y1 - 2012/11

N2 - Objectives Role functioning (RF) is a key component of health and well-being and an important outcome in health research. The aim of this study was to develop an item bank to measure impact of health on role functioning. Methods A set of different instruments including 75 newly developed items asking about the impact of health on role functioning was completed by 2,500 participants. Established item response theory methods were used to develop an item bank based on the generalized partial credit model. Comparison of group mean bank scores of participants with different self-reported general health status and chronic conditions was used to test the external validity of the bank. Results After excluding items that did not meet established requirements, the final item bank consisted of a total of 64 items covering three areas of role functioning (family, social, and occupational). Slopes in the bank ranged between .93 and 4.37; the mean threshold range was-1.09 to-2.25. Item bank-based scores were significantly different for participants with and without chronic conditions and with different levels of self-reported general health. Conclusions An item bank assessing health impact on RF across three content areas has been successfully developed. The bank can be used for development of short forms or computerized adaptive tests to be applied in the assessment of role functioning as one of the common denominators across applications of generic health assessment.

AB - Objectives Role functioning (RF) is a key component of health and well-being and an important outcome in health research. The aim of this study was to develop an item bank to measure impact of health on role functioning. Methods A set of different instruments including 75 newly developed items asking about the impact of health on role functioning was completed by 2,500 participants. Established item response theory methods were used to develop an item bank based on the generalized partial credit model. Comparison of group mean bank scores of participants with different self-reported general health status and chronic conditions was used to test the external validity of the bank. Results After excluding items that did not meet established requirements, the final item bank consisted of a total of 64 items covering three areas of role functioning (family, social, and occupational). Slopes in the bank ranged between .93 and 4.37; the mean threshold range was-1.09 to-2.25. Item bank-based scores were significantly different for participants with and without chronic conditions and with different levels of self-reported general health. Conclusions An item bank assessing health impact on RF across three content areas has been successfully developed. The bank can be used for development of short forms or computerized adaptive tests to be applied in the assessment of role functioning as one of the common denominators across applications of generic health assessment.

KW - Activities of Daily Living

KW - Adolescent

KW - Adult

KW - Aged

KW - Aged, 80 and over

KW - Confidence Intervals

KW - Educational Measurement

KW - Educational Status

KW - Female

KW - Health Status

KW - Health Surveys

KW - Humans

KW - Male

KW - Mental Health

KW - Middle Aged

KW - Outcome Assessment (Health Care)

KW - Personal Satisfaction

KW - Psychological Theory

KW - Psychometrics

KW - Quality of Life

KW - Self Report

KW - Young Adult

U2 - 10.1007/s11136-011-0076-4

DO - 10.1007/s11136-011-0076-4

M3 - Journal article

C2 - 22143196

SN - 0962-9343

VL - 21

SP - 1625

EP - 1637

JO - Quality of Life Research

JF - Quality of Life Research

IS - 9

ER -