TABLE 2.

Changes in chronic neck pain caused by cervical facet syndrome following the introduction of a visco-elastic polyurethane foam pillow and/or chiropractic treatment protocol.

Variable	Chiropractic treatment only group (CHI) (n = 15)			Chiropractic treatment with visco-elastic polyurethane foam cervical spine pillow group (CHI+P) (n=15)
	Consultation 1	Consultation 4	Consultation 7	Consultation 1	Consultation 4	Consultation 7
NRS score	5.27 ± 1.94	4.27 ± 1.58†	2.87 ± 1.19‡,§	5.93 ± 1.22	2.93 ± 1.75†	1.60 ± 1.30‡,§
NDI score	10.93 ± 5.50	6.33 ± 2.58†	4.20 ± 2.18‡,§	13.40 ± 4.82	6.40 ± 5.33†	3.80 ± 4.28‡,§

Data are presented as mean ± SD.

^†, Consultation 4 statistically significant (CHI: p = 0.016 [NRS]; p = 0.001 [NDI]; CHI+P: p = 0.001 [NRS]; p = 0.001 [NDI]) compared to consultation 1.

^‡, Consultation 7 statistically significant (CHI: p = 0.02 [NRS]; p = 0.02 [NDI]; CHI+P: p = 0.009 [NRS]; p = 0.001 [NDI]) compared to consultation 4.

^§, Consultation 7 statistically significant (CHI: p = 0.001 [NRS]; p = 001 [NDI]; CHI+P: p = 0.001 [NRS]; p = 0.003 [NDI]) compared to consultation 1.

NRS, Numerical Pain Rating Scale; NDI, Vernon–Mior Neck Pain and Disability Index.