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A2CPS Study Details


To learn more about the Acute to Chronic Pain Signatures study, explore the About section, including:

For more detail, see our published Biomarkers paper in PAIN and our Protocol paper published in Frontiers in Medicine.


A2CPS Primary Biomarkers

Patient Reported Outcomes & Behavior

Primary Biomarkers

Assessment

1. General pain intensity

Brief Pain Intensity -whole body pain

2. Local pain intensity

Modified BPI – surgical site pain

3. Widespread body pain

Michigan Body Map

4. Acute pain trajectory following surgery

 

Single item assessments of daily pain and/or pain interference during post-surgical period.

5. Disability

Knee Injury and Osteoarthritis Outcome Score – 12 (TKA only)

Danish Thoracic Surgery Questionnaire (Thoracic surgery only)

6. Physical function

 

PROMIS Short Form v2.0 Physical Function 8b

Five Times Sit-to-Stand, 10 Meter Walk Test (TKA only)

7. Movement-evoked pain

Five Times Sit-to-Stand, 10 Meter Walk Test (TKA only)

Coughing and deep breathing (Thoracic surgery only)

8. Anxiety

General Anxiety Disorder – 7

9. Depressive symptoms

Patient Health Questionnaire – 8

10. Pain catastrophizing

Pain Catastrophizing Scale – 6

11. Fear of movement

Fear Avoidance Beliefs Questionnaire – Physical Activity

12. Sleep

PROMIS Short Form v1.0 Sleep Disturbance 6a

Sleep duration = time of sleep obtained over the past month

13. Trauma history

Adverse Childhood Experience questionnaire

14. Resilience

Pain Resilience Scale

15. Social support

PROMIS SFv2.0 Instrumental Support 6a

PROMIS SFv2.0 Emotional Support 6a

16. Cognitive dysfunction

Multidimensional Inventory of Subjective Cognitive Impairment

Omics

Primary Biomarkers

Assessment

17. C-reactive protein

Proteomics/Luminex

18. Inflammatory markers – Tumor necrosis factor-alpha

Proteomics/Luminex

19.  Inflammatory markers – Interleukin-6

Proteomics/Luminex

20. Inflammatory markers – Interleukin-12

Proteomics/Luminex

21. Soluble glycoprotein 130

Proteomics/Luminex

22. Catechol-O-methyltransferase haplotype (rs4680)

Genotyping Array

23. Mu-opioid receptor (rs1799971)

Genotyping Array

24. ATP binding cassette subfamily B1 (rs1045642)

Genotyping Array

25. Brain derived neurotrophic factor (rs6265)

Genotyping Array

26. Brain derived neurotrophic factor (rs1491850)

Genotyping Array

Quantitative Sensory Testing (QST)

Primary Biomarkers

Assessment

27. Pressure pain threshold (PPT)

Pressure algometer at surgical site

28. Temporal summation (TS)

Punctate stimulus (Neuropen®) at surgical site

29. Conditioned pain modulation (CPM)

Change in shoulder PPT following noxious cold water submersion

Brain Imaging

Primary Biomarkers

Assessment

30. Gray matter volume of medial prefrontal cortex

T1

31. Structural integrity in Am-NAc-mPFC network

Diffusion weighted imaging, white matter tractography

32. Core DMN vmPFC/CCC–NAc/ventral striatum

rsfMRI

33. Core DMN: vmPFC/CCC–somatosensory (dplNS/S1)

rsfMRI

34. Core DMN: vmPFC/CCC-anterior/middle insula

rsfMRI

35. Hub disruption

rsfMRI

36. Evoked response in neurologic pain signature

Task fMRI (pressure cuff)

37. Evoked response in fronto-striatal systems related to descending / central pain modulation and self-regulation (vmPFC, NAc)

Optimized markers (SIIPS)