Table 2.

Logistic regression on the probability of 30% responseNegative values indicate reduced probability of 30% response.

Variable (baseline value)	Effect estimate	p Value of Type III effect	Category (p value)	Odds ratio	95% CI
Age	-0.0007	0.9350		0.999	0.98–1.02
Mental health	0.0045	0.2935		1.004	1.00–1.01
Pain at rest	-0.3612	0.1779	Moderate1 (0.0633)	0.697	0.48–1.02
Compared with no/slight pain	-0.2503		Severe1 (0.2783)	0.779	0.50–1.22
Pain on movement	-0.1683	0.6717	Moderate2 (0.6788)	0.845	0.38–1.87
Compared with no/slight pain	-0.2926		Severe2 (0.4652)	0.746	0.34–1.64
Physical functioning (SF-36)	-0.0055	0.2270		0.995	0.99–1.00
Social functioning (SF-36)	-0.0036	0.3129		0.996	0.99–1.00
Duration of pain	-0.0006	0.4152		0.999	0.99–1.00
Education	-0.2680	0.5083	Apprenticeship3 (0.3462)	0.765	0.44–1.34
Compared with primary education	0.0649		Secondary education3 (0.7356)	1.07	0.73–1.56
	0.2464		Higher education3 (0.4168)	1.28	0.71–2.32
Employment	-0.1039	0.0582	Employed4 (0.6751)	0.901	0.55–1.47
Categories compared with disabled	-0.8852		Non-professional4 (0.0029)	0.413	0.23–0.74
	-0.2908		Retired4 (0.2201)	0.748	0.47–1.19
	-0.2739		Student4 (0.4163)	0.760	0.39–1.47
High dose	0.7185	0.0499		2.051	1.00–4.21
Neuropathic pain	-0.1857	0.2735		0.831	0.60–1.16
Treatment group	0.0530	0.7434		1.054	0.77–1.45
Sex	0.0439	0.8033		1.045	0.74–1.48