Table 3.

Impact of factors measured during the intervention period on Northwick Park Neck Pain and Disability Questionnaire (NPQ) scores at 6 and 12 months.

Parameter undergoing change following the intervention	Difference in NPQ % score between Alexander Technique lesson group and usual care alone group (95% CI)
	6 months	p-value	12 months	p-value
Chronic Pain Self-Efficacy Scale	−3.34 (−4.03 to −2.64)	<0.001	−3.33 (−4.44 to −2.22)	<0.001
Perceived Stress Scale	0.78 (0.22 to 1.33)	0.008	0.98 (0.45 to 1.52)	0.001
Ability to use/apply things learned from the care in everyday life situations, to reduce pain	−2.72 (−4.14 to −1.29)	<0.001	−3.03 (−4.54 to −1.52)	<0.001
Extent able to put into practice the advice or teaching received	−1.09 (−2.03 to −0.15)	0.024	−1.82 (−2.57 to −1.08)	<0.001
Extent that changes made have been helpful	−1.79 (−2.45 to −1.12)	<0.001	−2.32 (−3.09 to −1.56)	<0.001

	Odds ratio (95% CI)	p-value	Odds ratio (95% CI)	p-value
Learnt to improve the way you live and care for yourself	−5.27 (−9.31 to −1.23)	0.012	−4.15 (−8.41 to 0.12)	0.057
Diet	−1.18 (−7.26 to 4.90)	0.685	1.00 (−5.91 to 7.90)	0.771
Exercise	−1.97 (−3.84 to −0.10)	0.039	−3.81 (−7.14 to −0.47)	0.027
Relaxation	−5.70 (−8.90 to −2.50)	0.001	−5.03 (−8.72 to −1.33)	0.009
Rest	−2.27 (−5.57 to 1.03)	0.171	−1.87 (−5.32 to 1.58)	0.278
Work	−3.70 (−7.70 to 0.30)	0.069	−2.28 (−5.55 to 0.98)	0.164

Data are from regression analysis with NPQ score as the outcome and intervention and characteristics included as covariates along with the same covariates as the primary analysis [16].