Table 2.

Change scores for sample I and II, including the proportion of missing items in the questionnaires

	Sample I			Sample II
	n	Mean change score (SD)	Missing items (%)	n	Mean change score (SD)	Missing items (%)
ProFitMap-neck
Symptom-intensity index
Improved	47	13.9 (11.1)	2	54	11.1 (8.1)	0
No or little change	41	5.0 (7.3)	0	47	1.8 (6.9)	0
Symptom-frequency index
Improved	47	18.5 (11.7)	0	54	14.1 (9.8)	0
No or little change	41	6.2 (9.1)	0	47	3.2 (9.0)	0
Function index
Improved	47	16.9 (13.0)	2	54	12.5 (10.4)	0
No or little change	41	7.0 (10.7)	3	47	3.5 (9.5)	0
Total score
Improved	47	16.6 (11.3)	4	54	12.5 (8.0)	0
No or little change	41	6.2 (7.7)	3	47	3.0 (7.2)	0
NDI
Improved	47	9.9 (8.2)	2	54	11.8 (7.4)	0
No or little change	41	2.8 (5.7)	0	47	1.5 (6.7)	0

n number of subjects, SD standard deviation, NDI Neck Disability Index