Table 4.

Clinical, psychosocial, medical care and pharmacotherapeutic characteristics associated with pain treatment satisfaction

	Pain Treatment Satisfaction Scale
	Beta coefficients in multivariate linear models
	Overall satisfaction	Satisfaction with current pain medication	Medication characteristic subscale	Efficacy subscale	Medical care	Impact of current pain medication	Information about pain and its treatment	Side effects of medication
Intercept	88.0	79.7	75.6	86.7	84.8	80.5	88.7	97.9
Clinical characteristics
Duration of pain
Each additional year of pain			0.23*			0.40**
Frequency of pain
Continuous		−5.6*	−8.2*			−8.0*
Occasional		Reference	Reference			Reference
Number of pain sites
Each additional site			−1.5*			−1.5*
Psychological characteristics
Pain disability (BPI)
Each additional point (0–10 scale)	−1.2**	−1.2*	−1.6*				−1.8*	−1.0**
Pain sleep impact (CPSI)
Each additional point (0–10 scale)						−1.0*
Level of depression (HADS)
Probable	−4.4*					−15.9**
Other	Reference					Reference
Level of anxiety (HADS)
Probable	−4.4*	−4.9*		−6.2*	−5.0*	−5.7*		−4.1
Other	Reference	Reference		Reference	Reference	Reference		Reference
Barriers to pain treatment (BQ-II)
Each addition point (0–5 scale)	−4.3**			−4.4*	−4.2*		−10.1**	−2.0
Pharmacotherapy characteristics
Use of OTC analgesics
Yes	−4.9**	−5.3*	−5.4*		−5.6*	−5.5*
No	Reference	Reference	Reference		Reference	Reference
Moderate to severe constipation
Yes								−9.7**
No								Reference
Moderate to severe heartburn
Yes								−13.5**
No								Reference
Moderate to severe nausea
Yes	−9.2**	−6.8*	−7.1*	−7.4*		−7.6*	−10.3	−15.3**
No	Reference	Reference	Reference	Reference		Reference	Reference	Reference
R2 of a multiple regression model	0.33	0.13	0.13	0.10	0.08	0.31	0.09	0.62

Notes:

^*α P<0.05;

^**β P<0.000l.

Abbreviations: BPI, Brief Pain Inventory; BQ-II, Barriers Questionnaire II; CPSI, Chronic Pain Sleep Inventory; HADS, Hospital Anxiety and Depression Scale; OTC, over-the-counter.