Comparative Efficacy and Mechanisms of a Single-Session Pain Psychology Class in Chronic Low Back Pain: Study Protocol for a Randomized Controlled Trial

Table 1 Inclusion criteria

Inclusion criteria	Rationale	Sources
Axial low back pain without radicular symptoms	Study restricted to low back pain	A, TS/S
Pain duration ≥ 6 months	As per recent NIH Task Force on Research Standards for Chronic Low Back Pain	A, TS/S
Average pain intensity ≥ 4/10 for the past month at screening visit	Significant level of back pain to treat and to detect improvement	A, TS/S
English fluency		A, TS/S
Men and women aged 18–70 years		A, TS/S
PCS score ≥ 20	Significant level for PC [4]	TS/S

A automated data gathered from REDCap Surveys, TS telephone screening, S screening visit, PCS Pain Catastrophizing Scale

ISSN: 1745-6215