Development and validation of the ND10 to measure neck-related functional disability

Table 3 Comparison of item content of ND10 to other neck-specific PROMs

ND10 Disability Items	NDI(10)	NPAD(20)	NPNPQ(10)	CNFDS(15)	NBQ(7)
Washed and dressed	√P	√P		√ √P
Lift and carry heavy things	√P		√P	√P
Read (book, paper, tablet, computer, or phone)	√P		√P	√P
Do my usual work	√	√P	√P		√P
Drive or ride (car, bus, train, bicycle etc.)	√P	√P	√P		√P
Do my usual recreation or sports	√P	√P
Concentrate on tasks	√	√P		√P
Sleep	√	√P	√P	√P
Place something on a high shelf
Do overhead work (Like change light bulbs, wash walls)
Disability Items from other PROMs not on ND10		√P
Daily activities				√P √H	√P
Standing		√P
Walking		√P
Out-of-construct items from other PROMs not on ND10
Pain	√	√√√	√		√
Headaches	√			√P
Social life		√P	√P	√P	√
Emotions		√P
Anxiety					√
Depression					√
Control of pain					√
Stiffness		√P
Neck motion		√P VP
Pins and needles			√
Duration of symptoms			√
Global rating of change			√
Time at home				√P
Time in bed				√P
Emotional relationship with family		√P		√P
Effect on future		√P		√P
Medication use		√P

This table shows the extent to which the same or similar items are contained across different neck disability PROMs (√). A “P” added to the “√” indicates the item mentioned a functional task, but was framed in terms of neck pain interference with function (not functional (dis)ability). An “H” indicates framed in terms of help needed
ND10 Neck Disability 10, NDI Neck Disability Index, NPNPQ Northwick Park Neck Pain Questionnaire, CNFDS, Copenhagen Neck Functional Disability Scale, NBQ Neck Bournemouth Questionnaire, NPAD Neck Pain and Disability scale. The number of items is in brackets after the PROM acronym

ISSN: 1471-2474