Postural control in individuals with and without non-specific chronic low back pain: a preliminary case–control study

Abstract

To the editor, We thank the authors for their comments on this paper. The authors raise concern over our methodology. 1. First, each position lasts 10 s and is repeated three times, 30 s totally in each position. Second, after the subject stands on the surface and achieves stability then we start the test, and screen will tell the subject the test will start. Third, these procedures were guided by the manufacturer , which are also used in lots of studies. 2. What the authors proposed is the detailed way to calculate COP. In our study, the COP is automatically calculated by the software, and what we wrote in the manuscript is the concept of COP. 3. The LSO position is guided by the manufacturer. 4. According to the previous studies, the test-retest reliability is excellent (ICC = 0.91) [1] (http ://www. reha bmea sure s.org/List s/Reha bMea sure s/Disp Form. aspx ?ID=897). To confirm that, an additional experiment was also conducted based on a sample with ten subjects in two independent testers. The result showed that the interobserver (ICC = 0.94) and intraobserver reliability (ICC = 0.91) was similar to previous studies. 5. ANOVA with repeated measure is commonly used in repeated measure design. In our study, it is not a repeated measure design. 6. We mentioned in the Method section, and we calculated the analysis power using an interactive program named PS (Power and Sample Size Calculation version 3.1.2, 2014, http ://bios tat.mc.vand erbi lt.edu/wiki /Main /Powe r Sam pleS ize#Refe renc es). The power of statistical analysis in the effect of LSO on Foam-EO and Foam-EC was 0.982 and 0.996, respectively. The power of statistical analysis in the difference between two groups in Foam-EO and Foam-EC was 0.814 and 0.815, respectively.

Effect of a single session of ear acupuncture on pain intensity and postural control in individuals with chronic low back pain: a randomized controlled trial

“…It has been suggested that LBP disrupts the ability of the nervous system to obtain appropriate proprioceptive information from the muscles of the lumbar region 15 and it could affect the accurateness of the information about the trunk position in space. However, the difference between LBP and healthy individuals in postural tasks is seen mainly in more demanding tasks 13 , 16 . In this study, we tested the hypothesis that a single application of EA in individuals with chronic LBP would be sufficient to temporarily reduce pain intensity and improve balance, reducing their body sway, mainly in more complex postural tasks, when compared to a placebo treatment.…”

Age-related differences on low back pain and postural control during one-leg stance: a case–control study

“…Consequently, it can be supported that postural control, as evidenced by increased oscillation of the COP, is impaired in individuals with CLBP under a one-leg stance condition. In fact, there are significant differences in postural control between CLBP and controls when postural demands increase, as unipodal posture and/or eyes closed conditions of balance [10,15,27].…”

“…Caffaro et al [27] evaluated 44 younger adults and found that the subjects with CLBP (n = 21) had greater postural sway during quiet standing with eyes closed on unstable surfaces than the subjects without CLBP (n = 23) for different stability indices, including COP area. However, when using a similar balance task (but in erect posture without manipulating the sensorial systems), Kiers et al [28] showed no significant differences in COP oscillation between those with low back pain (n = 33) as compared to those without pain (n = 182).…”

Footwear‐Generated Dynamic Biomechanical Manipulation and Perturbation Training for Chronic Nonspecific Low Back Pain

“…CNSLBP, a heterogeneous condition, is known to be associated with several lumbosacral structures, including the facet joint, intervertebral disc, ligament, muscle/muscle fascia, and sacroiliac joint; however, clinical tests do not reliably attribute the pain to those structures [6,7]. Abnormal lower extremity biomechanics affecting these lumbopelvic structures [8,9] and suboptimal neuromuscular control [10,11] have been recognized increasingly as contributors for CNSLBP.…”