Table 6:

Baseline characteristics examined: hypothesized (●) moderators and nonspecific predictors of 8-week improvement in functional limitations (mRDQ), pain bothersomeness, and depressive symptoms (PHQ-8); effects with P < 0.05 but not statistically significant after Bonferroni correction (X) and statistically significant after Bonferroni correction (B).

	Moderators									Nonspecific Predictors
	CBT – UC			MBSR - UC			CBT - MBSR
Baseline characteristic	mRDQ	Pain Bothersomeness	PHQ-8	mRDQ	Pain Bothersomeness	PHQ-8	mRDQ	Pain Bothersomeness	PHQ-8	mRDQ	Pain Bothersomeness	PHQ-8
Age												X
Gender (female vs male)					X			X
Education (bachelor’s degree vs less education)										●	● X	●
Depressive symptoms, moderate-severe (PHQ-8 ≥10)	●	●	● X	●	●	● X	●	●	●
Depressive symptoms, mild or more severe (PHQ-8 ≥5)	●	●	●X	●	● X	●	●	● X	●
Pain bothersomeness	●	●	●	●	●	●	●	●	●	●	●	●
Functional limitations (mRDQ)	●	●	●	●	●	●	●	●	●	●	●	●
Widespread pain										●	●	● X
Expected pain improvement										●	●	●
Expected program helpfulness
Anxiety (GAD-2)	●	●	●	●	●	●	●	●	●			B
SOPA Disability
SOPA Harm		X
SOPA Control										X	X	B
SOPA Emotion
Pain self-efficacy (PSEQ)	X				X
Pain catastrophizing (PCS)										X
Pain acceptance (CPAQ-8)
FFMQ-SF OB
FFMQ-SF AA												X
FFMQ-SF NR
FFMQ-SF NJ							B	X				X
Opioid use, past wk (vs no use)

AA, Acting with Awareness; CBT, cognitive-behavioral therapy; CPAQ-8, Chronic Pain Acceptance Questionnaire-8; FFMQ-SF, Five Facet Mindfulness Questionnaire-short form; GAD, Generalized Anxiety Disorder; MBSR, Mindfulness-Based Stress Reduction; NJ, Nonjudging; NR, Nonreactivity; OB, Observing; PCS, Pain Catastrophizing Scale; PHQ, Patient Health Questionnaire; PSEQ, Pain Self-Efficacy Questionnaire; mRDQ, modified Roland Disability Questionnaire; SOPA, Survey of Pain Attitudes; UC, Usual Care

● Hypothesized moderator or nonspecific predictor

X Effect with P < 0.05

B Effect that is statistically significant after Bonferroni correction.