Table 1.

Daily and weekly survey items, listed by construct.

Survey item	Item wording
Pain on the average
BPI daily item	Please rate your pain on the AVERAGE in the last 24 h, using a scale from 0 to 10, where 0 meansno pain and 10 means pain as bad as you can imagine.
Adapted forweekly report	Please rate your pain on the AVERAGE in the last 7 days, using a scale from 0 to 10, where 0 meansno pain and 10 means pain as bad as you can imagine.
Pain at its worst
BPI daily item	Please rate your pain at its WORST in the last 24 h, using a scale from 0 to 10, where 0 means nopain and 10 means pain as bad as you can imagine.
Adapted forweekly report	Please rate your pain at its WORST in the last 7 days, using a scale from 0 to 10, where 0 meansno pain and 10 means pain as bad as you can imagine.

BPI: Brief Pain Inventory.