Sylvia H. Paz|Karen L. Spritzer|Leo S. Morales|Ron D. Hays
Evaluation of the Patient-Reported Outcomes Information System (PROMIS®) Spanish-language physical functioning items
Group Health Cooperative|Seattle University|University of Washington|Kaiser Permanente Washington Health Research Institute|RAND Corporation
evaluate equivalence promis physical functioning item bank language administration english versus spanish promis wave 1 englishlanguage physical functioning bank consists 124 items 114 translated spanish item frequencies means standard deviations itemscale correlations internal consistency reliability calculated irt assumption unidimensionality evaluated fitting singlefactor confirmatory factor analytic model irt threshold discrimination parameters estimated using samejimas graded response model dif language administration evaluated item means ranged 253 sd 136 462 sd 082 coefficient alpha 099 itemrest correlations ranged 041 089 onefactor model fits data well cfi 0971 tli 0970 rmsea 0052 slope parameters ranged 045 able run 10 miles 450 able put shirt blouse threshold parameters ranged 192 much physical health problems limit usual physical activities walking climbing stairs 606 able run 10 miles fifty 114 items flagged dif based r 2 002 criterion expected total score higher spanish englishlanguage respondents english spanishspeaking subjects level underlying physical function responded differently 50 114 items study important implications study physical functioning among diverse populations