Supplemental Material for
Differential Item Functioning of PROMIS Sleep Disturbance–Short Form 8a Across Levels of Health Literacy in a Community Sample of Adults
Rowida Mohamed 
, Michael K. Paasche-Orlow, Eloisa Serrano, Melissa Marquez, Lori Henault, Claire Weaver, Noël C. Slesinger Roy, Francesca R. Farina, Emily Hurstak, Michelle Taddeo, Katherina Hauner, and
James W. Griffith
Psychological Assessment,
Vol.
38,
No.
5,
pp.
384–395
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