• Lei Han, Ping Zhao, Wei Guo, Jie Wei, Fei Wang, Yu Fan, Yi Li, and Yaqing Min.
• PLA Spine Center of TCM Manipulative Orthopedics, Air Force General Hospital of PLA, No. 30, Fu Cheng Street, Hai Dian District, Beijing, 100142, China. sfjhanlei@163.com.
• Trials. 2015 Jan 1;16:122.

BackgroundThat patients with acute radiculopathy caused by lumbar disc herniation (LDH) will benefit from spinal manipulation (SM) treatment has been taken for granted, despite no solid evidence to support that claim. There is a demand for a win-win SM treatment that is both effective and less risky, and we attempt to use this trial to demonstrate such a treatment. In this study, Feng's Spinal Manipulative Therapy (FSM) is selected as the observational SM. FSM can be performed with either manipulation or mobilization, and also can be easily mimicked as a sham SM.Methods/DesignTwo hundred and sixteen qualified hospitalized participants will be randomly allocated to one of the three following groups: sham SM, mobilization, or manipulation, according to a ratio of 1:1:1. Participants in each group will receive specific FSM treatments four times, along with basic therapies over a course of 2 weeks. Two days after each SM appointment, risk outcomes will be assessed using a questionnaire developed to identify accompanying unpleasant reactions (AUR). The pain pressure threshold (PPT) will be measured paraspinally on the tender spot beside the involved joint before and immediately after each SM treatment. Relative risk (RR) of AUR, number needed to harm (NNH) and the 95% confidence intervals of each group will be calculated and compared. Benefit outcomes will be assessed by analyzing the following data recordings: the Numerical Rating Scale (NRS), Oswestry Disability Index (ODI), and Global Perceived Effect (GPE) before enrollment and at the 7th, and 15th day after the treatment. Analyses will include comparisons of NRS, ODI and changes at the different visit times among the three groups by Repeated Measures Data ANOVA, an evaluation of reduced scores of NRS and ODI after the therapy to determine if they meet the minimum acceptable outcome (MAO), and the determination of the minimal clinically important difference (MCID) by the average improvement in NRS and ODI scores of all participants who have been allocated to the category 'improved' on the GPE assessment.Trial RegistrationThis trial is registered in Chinese Clinical Trial Register (ChiCTR) on 19 August 2013 ( ChiCTR-TRC-13003496 ).

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