PMID- 24731602 OWN - NLM STAT- MEDLINE DCOM- 20160418 LR - 20140613 IS - 1532-2769 (Electronic) IS - 1356-689X (Linking) VI - 19 IP - 4 DP - 2014 Aug TI - Sensory characteristics of chronic non-specific low back pain: a subgroup investigation. PG - 311-8 LID - S1356-689X(14)00040-X [pii] LID - 10.1016/j.math.2014.03.006 [doi] AB - It has been proposed that patients with chronic non-specific low back pain (CNSLBP) can be broadly classified based on clinical features that represent either predominantly a mechanical pain (MP) or non-mechanical pain (NMP) profile. The aim of this study was to establish if patients with CNSLBP who report features of NMP demonstrate differences in pain thresholds compared to those who report MP characteristics and pain-free controls. This study was a cross-sectional design investigating whether pressure pain threshold (PPT) and/or cold pain threshold (CPT) at three anatomical locations differed between patients with mechanical CNSLBP (n = 17) versus non-mechanical CNSLBP (n = 19 and healthy controls (n = 19) whilst controlling for confounders. The results of this study provide evidence of increased CPT at the wrist in the NMP profile group compared to both the MP profile and control subjects, when controlling for gender, sleep and depression (NMP versus MP group Odds Ratio (OR): 18.4, 95% confidence interval (CI): 2.5-133.1, p = 0.004). There was no evidence of lowered PPT at any site after adjustment for confounding factors. Those with an MP profile had similar pain thresholds to pain-free controls, whereas the NMP profile group demonstrated elevated CPT's consistent with central amplification of pain. These findings may represent different pain mechanisms associated with these patient profiles and may have implications for targeted management. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - O'Sullivan, Peter AU - O'Sullivan P AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. Electronic address: p.osullivan@curtin.edu.au. FAU - Waller, Robert AU - Waller R AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Wright, Anthony AU - Wright A AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Gardner, Joseph AU - Gardner J AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Johnston, Richard AU - Johnston R AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Payne, Carly AU - Payne C AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Shannon, Aedin AU - Shannon A AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Ware, Brendan AU - Ware B AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. FAU - Smith, Anne AU - Smith A AD - School of Physiotherapy & Exercise Science, Curtin University, GPO Box 1987, Perth, WA 6845, Australia. LA - eng PT - Comparative Study PT - Journal Article DEP - 20140325 PL - Scotland TA - Man Ther JT - Manual therapy JID - 9610924 SB - IM MH - Adult MH - Age Factors MH - Chronic Pain/*classification/diagnosis/rehabilitation MH - Confidence Intervals MH - Cross-Sectional Studies MH - Female MH - Humans MH - Low Back Pain/*classification/diagnosis/rehabilitation MH - Male MH - Middle Aged MH - Odds Ratio MH - *Pain Measurement MH - Pain Threshold/*physiology MH - Reference Values MH - Risk Assessment MH - Sensory Thresholds/*physiology MH - Severity of Illness Index MH - Sex Factors OTO - NOTNLM OT - Biopsychosocial OT - Chronic non-specific low back pain OT - Classification OT - Pain sensitivity EDAT- 2014/04/16 06:00 MHDA- 2016/04/19 06:00 CRDT- 2014/04/16 06:00 PHST- 2013/05/22 00:00 [received] PHST- 2014/03/06 00:00 [revised] PHST- 2014/03/14 00:00 [accepted] PHST- 2014/04/16 06:00 [entrez] PHST- 2014/04/16 06:00 [pubmed] PHST- 2016/04/19 06:00 [medline] AID - S1356-689X(14)00040-X [pii] AID - 10.1016/j.math.2014.03.006 [doi] PST - ppublish SO - Man Ther. 2014 Aug;19(4):311-8. doi: 10.1016/j.math.2014.03.006. Epub 2014 Mar 25.