Prognostic factors for the improvement of pain and disability following multidisciplinary rehabilitation in patients with chronic neck pain

Table 4 Multivariable regression of changes in NASS pain+disability scores between baseline and programme discharge (n = 112)

Covariate	Change R²	Change F-value	Regression coefficient	95% CI	p-value	Bivariate correlation	Partial correlation
Constant			−1.890	(−2.974 to 0.805)	0.001
NASS pain+disability baseline	0.151	2.209	0.281	(0.159 to 0.403)	< 0.001	0.376	0.414
Age	0.038	0.312	0.009	(0.001 to 0.017)	0.024	0.077	0.223
Active ROM,* baseline	0.034	0.228	0.002	(0.000 to 0.005)	0.033	0.004	0.210
SF-36 mental health, change	0.029	0.140	0.007	(0.000 to 0.013)	0.047	0.219	0.197
Active ROM,* change	0.029	0.132	0.003	(0.000 to 0.006)	0.048	0.052	0.195
SF-36 mental health, baseline	0.024	0.030	0.005	(0.000 to 0.010)	0.072	−0.085	0.178
Education	0.018	−0.093	−0.050	(−0.113 to 0.013)	0.121	−0.158	− 0.154
Sex (0 = female; 1 = male)	0.006	−0.336	− 0.079	(− 0.250 to 0.093)	0.365	− 0.017	− 0.090
Marital Status (1 = alone; 2 = with partner)	0.003	− 0.406	0.053	(−0.122 to 0.228)	0.546	0.087	0.060
Co-morbidities	0.002	−0.410	0.018	(−0,043 to 0.079)	0.560	0.172	0.058
Model total	0.273	3.784			0.000

* Active ROM: sum of the ranges-of-motion of cervical lateral flexion (both sides), cervical rotation (both sides), neck flexion, and neck extension. Positive regression coefficients for change scores represent positive associations. NASS: North American Spine Society questionnaire; SF-36: Short Form 36 questionnaire

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