The Brief Pain Inventory (BPI) (Cleeland & Ryan, 1994) produces pain severity and pain interference scores ranging from 0 to 10; higher scores indicate worse pain. There is a short and a long form. There are 15 questions on the Short Form BPI (9 questions, with the last question containing 7 parts). In PROMIS calibration testing, 11 of the 15 questions were administered (BPI items 1, 2, 7, and 8 were omitted). However, for some BPI items, PROMIS calibration testing used a one week recall period. This matches the recall period used by the BPI long form, but not the 24-hour recall period used in the BPI short form.