Erector Spinae Plane Block Versus Trigger Point Injection for Chronic Thoracic Myofascial Pain

Modified Oswestry Disability Index

Oswestry Disability Index (ODI) is a validated 10-item questionnaire assessing functional limitations in daily activities across spinal disorders, with total scores ranging from 0 to 100, where higher scores indicate greater disability.

Time frame: baseline, 6 weeks

Center for Epidemiologic Studies Depression Scale (CES-D)

Center for Epidemiologic Studies Depression Scale (CES-D) is a 20-item questionnaire with scores ranging from 0 to 60, with higher scores indicating greater depressive symptom burden.

Time frame: baseline, 6 weeks

Pain Catastrophizing Scale (PCS)

The PCS is a 13-item instrument measuring catastrophic thinking related to pain, with scores ranging from 0 to 52, and scores of 30 or higher indicating clinically significant levels of catastrophizing.

Time frame: baseline, 6 weeks

Patient Global Impression of Change (PGIC)

The PGIC questionnaire is a 7-point Likert scale ranging from "very much worse" to "very much improved." This measure provides a global assessment of treatment benefit from the patient's perspective.

Time frame: 6 weeks

Repeat Injections

This measure will assess the number of patients requiring repeat injection(s) within 12 weeks following the index procedure. Measurement: Binary outcome (yes/no), obtained via follow-up assessment of medical record review (no patient questionnaire).

Time frame: 12 weeks

Adverse Events

We will assess the occurrence of procedure-related adverse events within 6 weeks following the index procedure. This will involve categorical recording of adverse events including but not limited to: injection site pain, hematoma, infection, vasovagal reaction, allergic reaction, pneumothorax, and new or worsening neurologic symptoms. All adverse events will be recorded and categorized according to severity and relatedness to the procedure.

Time frame: Day 0 (procedure day), 6 weeks