Table 1.

Patient baseline characteristics for the TAU and COLP groups.

Baseline characteristics	TAU (n = 22)	COLP (n = 19)
Demographics
Age	61.2 ± 13.0	59.1 ± 13.1
Female	13 (59%)	7 (37%)
Non-Hispanic White	22 (100%)	18 (95%)
BMI	31.6 ± 7.8	31.5 ± 8.0
Education level
High school	1 (5%)	1 (5%)
Technical school	0 (0%)	1 (5%)
Some college	4 (18%)	5 (26%)
Associate degree	3 (14%)	2 (11%)
Bachelor’s degree	9 (41%)	3 (16%)
Master’s degree	3 (14%)	6 (32%)
Doctoral degree	2 (9%)	1 (5%)
Psychosocial measures
Catastrophizing	15.1 ± 10.0	16.4 ± 14.0
Depression	14.2 ± 6.3	13.3 ± 6.1
Sleep disturbance	27.9 ± 7.3	26.1 ± 7.7
Anxiety	14.9 ± 6.3	16.3 ± 6.1
Somatization	11.1 ± 3.6	11.2 ± 3.4
Positive affect	31.1 ± 7.8	31.2 ± 7.8
Negative affect	18.5 ± 5.6	19.4 ± 7.2
Pain and opioid use
BPI mean	5.4 ± 1.4	5.3 ± 2.6
BPI interference	5.6 ± 2.0	4.6 ± 2.5
Fibromyalgianess	11.8 ± 5.0	9.4 ± 4.3
Opioid misuse risk (SOAPP)	3.5 ± 2.4	2.9 ± 2.3
Taking opioid medications	4 (18%)	2 (11%)
Quantitative sensory testing (QST)
Temporal summation of pain (TSP)	2.9 ± 1.6	2.2 ± 1.8
Forearm threshold	8.0 ± 3.0	9.23 ± 4.7
Forearm tolerance	12.7 ± 4.7	13.5 ± 5.6
Trapezius threshold	10.9 ± 4.6	12.9 ± 4.4
Trapezius tolerance	15.4 ± 5.0	16.3 ± 4.6

Data are given in either mean ± SD or n(percent). Treatment groups were balanced across all variables. BMI, body mass index; BPI, Brief Pain Inventory; COLP, conditioned open-label placebo; SOAPP, Screener and Opioid Assessment for Patients with Pain; TAU, treatment as usual