PMID- 32532328 OWN - NLM STAT- MEDLINE DCOM- 20210112 LR - 20210112 IS - 2045-709X (Electronic) IS - 2045-709X (Linking) VI - 28 IP - 1 DP - 2020 Jun 12 TI - Pressure pain threshold and temporal summation in adults with episodic and persistent low back pain trajectories: a secondary analysis at baseline and after lumbar manipulation or sham. PG - 36 LID - 10.1186/s12998-020-00326-5 [doi] LID - 36 AB - BACKGROUND: People with chronic low back pain (LBP) typically have increased pain sensitivity compared to healthy controls, however its unknown if pain sensitivity differs based on LBP trajectory at baseline or after manual therapy interventions. We aimed to compare baseline pressure pain threshold (PPT) and temporal summation (TS) between people without LBP, with episodic LBP, and with persistent LBP, and to compare changes over time in PPT and TS after a lumbar spinal manipulation or sham manipulation in those with LBP. METHODS: Participants were aged 18-59, with or without LBP. Those with LBP were categorised as having either episodic or persistent LBP. PPT and TS were tested at baseline. LBP participants then received a lumbar spinal manipulation or sham, after which PPT and TS were re-tested three times over 30 min. Generalised linear mixed models were used to analyse data. RESULTS: One hundred participants (49 female) were included and analysed. There were 20 non-LBP participants (mean age 31 yrs), 23 episodic LBP (mean age 35 yrs), and 57 persistent LBP (mean age 37 yrs). There were no significant differences in PPT or TS between groups at baseline. There was a non-significant pattern of lower PPT (higher sensitivity) from the non-LBP group to the persistent LBP group at baseline, and high variability. Changes in PPT and TS after the interventions did not differ between the two LBP groups. DISCUSSION: We found no differences between people with no LBP, episodic LBP, or persistent LBP in baseline PPT or TS. Changes in PPT and TS following a lumbar manual therapy intervention do not appear to differ between LBP trajectories. TRIAL REGISTRATION: The trial was prospectively registered with ANZCTR (ACTRN12617001094369). FAU - Aspinall, Sasha L AU - Aspinall SL AUID- ORCID: 0000-0003-1019-5940 AD - College of Science, Health, Engineering and Education, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia. sasha.aspinall@murdoch.edu.au. FAU - Jacques, Angela AU - Jacques A AD - College of Science, Health, Engineering and Education, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia. FAU - Leboeuf-Yde, Charlotte AU - Leboeuf-Yde C AD - College of Science, Health, Engineering and Education, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia. AD - Institute of Regional Health Research, University of Southern Denmark, J. B. Winslows Vej 19, 3, 5000, Odense C, Denmark. FAU - Etherington, Sarah J AU - Etherington SJ AD - College of Science, Health, Engineering and Education, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia. FAU - Walker, Bruce F AU - Walker BF AD - College of Science, Health, Engineering and Education, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia. LA - eng SI - ANZCTR/ACTRN12617001094369 PT - Comparative Study PT - Journal Article PT - Observational Study PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20200612 PL - England TA - Chiropr Man Therap JT - Chiropractic & manual therapies JID - 101551481 RN - 0 (Placebos) SB - IM MH - Adolescent MH - Adult MH - Female MH - Humans MH - Low Back Pain/*therapy MH - Male MH - Manipulation, Spinal/*methods MH - Middle Aged MH - Nervous System Physiological Phenomena MH - *Pain Threshold MH - Placebos MH - Surveys and Questionnaires MH - Young Adult PMC - PMC7291433 OTO - NOTNLM OT - Hyperalgesia OT - Low back pain OT - Pressure pain threshold, temporal summation OT - Quantitative sensory testing OT - Sensitisation OT - Sensitization OT - Spinal manipulation OT - Trajectories COIS- BW is Editor in Chief and CLY is Senior Editorial Advisor of Chiropractic & Manual Therapies. Both played no part in the review of this submission and were blinded to the process. SA, AJ and SE declare that they have no competing interests. EDAT- 2020/06/14 06:00 MHDA- 2021/01/13 06:00 PMCR- 2020/06/12 CRDT- 2020/06/14 06:00 PHST- 2019/12/12 00:00 [received] PHST- 2020/06/04 00:00 [accepted] PHST- 2020/06/14 06:00 [entrez] PHST- 2020/06/14 06:00 [pubmed] PHST- 2021/01/13 06:00 [medline] PHST- 2020/06/12 00:00 [pmc-release] AID - 10.1186/s12998-020-00326-5 [pii] AID - 326 [pii] AID - 10.1186/s12998-020-00326-5 [doi] PST - epublish SO - Chiropr Man Therap. 2020 Jun 12;28(1):36. doi: 10.1186/s12998-020-00326-5.