Table 5.

Bivariable and multivariable logistic regression results for predictors of negative PMI (n=371)

Predictors variables	Bivariable analyses			Multivariable modela,b
	OR	95% CI	p-value	OR	95% CI	p-value
Age	0.99	0.98–1.01	0.45	0.99	0.97–1.00	0.14
Female sex	1.59	0.99–2.57	0.05	1.70	0.99–2.92	0.05
Drug/alcohol abuse	0.58	0.07–5.00	0.62
Palliative care goal	0.75	0.47–1.20	0.23
Head/neck metastases	0.25	0.06–1.08	0.06	0.26	0.05–1.32	0.10
CNS metastases	0.47	0.13–1.62	0.23
Radiotherapy in last 30 days	0.53	0.32–0.85	0.009	0.45	0.26–0.79	0.006
DN4 positive	0.74	0.46–1.19	0.21	0.54	0.30–0.97	0.04
Incident pain	0.65	0.41–1.05	0.07
No opioids	8.89	4.38–18.04	<0.001
Adjuvants≥1	0.64	0.40–1.02	0.06	0.57	0.32–0.99	0.05
Pain duration>3 months	1.27	0.79–2.02	0.32
ET_need help>4	0.60	0.37–0.97	0.04	0.55	0.32–0.96	0.03
BPI_interference with walking	1.08	0.98–1.18	0.12	1.09	0.98–1.21	0.13
BPI_interference with general activity	1.14	1.03–1.25	0.009	1.14	1.02–1.27	0.02
BPI_pain relief	0.96	0.95–0.97	<0.001	0.97	0.96–0.98	<0.001
Intercept				1.28	0.20–8.09	0.79

Notes:

^aModel’s goodness of fit: Hosmer–Lemeshow chi-square=6.33 (p=0.61).

^bModel’s discrimination: area under ROC=0.782.

Abbreviations: BPI, Brief Pain Inventory; CI, confidence interval; CNS, central nervous system; DN4, “Douleur Neuropathique 4” (neuropathic pain diagnostic questionnaire); ET, Emotion Thermometer; OR, odds ratio; PMI, pain management index; ROC, receiver operating characteristic curve.