TY - JOUR

T1 - The PROMIS Physical Function item bank was calibrated to a standardized metric and shown to improve measurement efficiency

AU - Rose, Matthias

AU - Bjørner, Jakob

AU - Gandek, Barbara

AU - Bruce, Bonnie

AU - Fries, James F

AU - Ware, John E

N1 - Copyright © 2014. Published by Elsevier Inc.

PY - 2014/5

Y1 - 2014/5

N2 - OBJECTIVE: To document the development and psychometric evaluation of the Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function (PF) item bank and static instruments.STUDY DESIGN AND SETTING: The items were evaluated using qualitative and quantitative methods. A total of 16,065 adults answered item subsets (n>2,200/item) on the Internet, with oversampling of the chronically ill. Classical test and item response theory methods were used to evaluate 149 PROMIS PF items plus 10 Short Form-36 and 20 Health Assessment Questionnaire-Disability Index items. A graded response model was used to estimate item parameters, which were normed to a mean of 50 (standard deviation [SD]=10) in a US general population sample.RESULTS: The final bank consists of 124 PROMIS items covering upper, central, and lower extremity functions and instrumental activities of daily living. In simulations, a 10-item computerized adaptive test (CAT) eliminated floor and decreased ceiling effects, achieving higher measurement precision than any comparable length static tool across four SDs of the measurement range. Improved psychometric properties were transferred to the CAT's superior ability to identify differences between age and disease groups.CONCLUSION: The item bank provides a common metric and can improve the measurement of PF by facilitating the standardization of patient-reported outcome measures and implementation of CATs for more efficient PF assessments over a larger range.

AB - OBJECTIVE: To document the development and psychometric evaluation of the Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function (PF) item bank and static instruments.STUDY DESIGN AND SETTING: The items were evaluated using qualitative and quantitative methods. A total of 16,065 adults answered item subsets (n>2,200/item) on the Internet, with oversampling of the chronically ill. Classical test and item response theory methods were used to evaluate 149 PROMIS PF items plus 10 Short Form-36 and 20 Health Assessment Questionnaire-Disability Index items. A graded response model was used to estimate item parameters, which were normed to a mean of 50 (standard deviation [SD]=10) in a US general population sample.RESULTS: The final bank consists of 124 PROMIS items covering upper, central, and lower extremity functions and instrumental activities of daily living. In simulations, a 10-item computerized adaptive test (CAT) eliminated floor and decreased ceiling effects, achieving higher measurement precision than any comparable length static tool across four SDs of the measurement range. Improved psychometric properties were transferred to the CAT's superior ability to identify differences between age and disease groups.CONCLUSION: The item bank provides a common metric and can improve the measurement of PF by facilitating the standardization of patient-reported outcome measures and implementation of CATs for more efficient PF assessments over a larger range.

KW - Adolescent

KW - Adult

KW - Aged

KW - Aged, 80 and over

KW - Calibration

KW - Disability Evaluation

KW - Female

KW - Humans

KW - Male

KW - Middle Aged

KW - Psychometrics

KW - Qualitative Research

KW - Questionnaires

KW - Reproducibility of Results

KW - Young Adult

U2 - 10.1016/j.jclinepi.2013.10.024

DO - 10.1016/j.jclinepi.2013.10.024

M3 - Journal article

C2 - 24698295

VL - 67

SP - 516

EP - 526

JO - Journal of Clinical Epidemiology

JF - Journal of Clinical Epidemiology

SN - 0895-4356

IS - 5

ER -