Identifying Patient Characteristics Associated With the Occurrence of Post Treatment Non-serious Adverse Events After Cervical Spine Manual Therapy Treatment in Patients With Neck Pain

Effectiveness of Manual Joint Mobilization Techniques in the Treatment of Nonspecific Neck Pain: Systematic Review With Meta-Analysis and Meta-Regression of Randomized Controlled Trials

OBJECTIVE: The purpose of this study was to investigate the effects of cervical joint mobilization techniques (JMTs) on pain and disability in adults with nonspecific neck pain. DESIGN: This study is an intervention systematic review with meta-analysis and meta-regression of randomized controlled trials (RCTs). LITERATURE SEARCH: We searched MEDLINE, Cochrane CENTRAL, EMBASE, Cumulative Index to Nursing and Allied Health Literature, Physiotherapy Evidence Database, and Web of Science databases, including references from other reviews or clinical practice guidelines up to October 16, 2024. STUDY SELECTION CRITERIA: Eligible RCTs evaluated JMTs compared to routine physiotherapy, minimally active interventions, or no treatment. The primary outcome was pain; secondary outcomes were disability, Global Perceived Effect (GPE), quality of life, psychosocial status, and adverse events. DATA SYNTHESIS: Meta-analyses and meta-regression were conducted for pain, disability, and GPE. The risk of bias was assessed with Cochrane RoB 2.0 Tool; the certainty of the evidence was assessed with the Grading of Recommendations, Assessment, Development, and Evaluations approach. We used The Template for the Intervention Description and Replication checklist to evaluate the quality of reporting of interventions delivered. RESULTS: Results from 16 RCTs were pooled (n = 1,157 participants), reporting nonclinically positive results on pain reduction (mean difference [MD] = -0.86 (95% confidence interval [-1.35, -0.36])), disability (MD=-2.11 [-3.31, -0.91]), and GPE (standardized mean difference = 0.11 ([-0.15, 0.37]) and high heterogeneity. The meta-regressions did not identify any covariates associated with the treatment effects. Minor side effects (increased neck pain and headache) were reported. CONCLUSION: There was very low certainty evidence supporting the efficacy of JTMs for reducing pain and improving disability in people with NSNP. J Orthop Sports Phys Ther 2025;55(3):1-20. Epub 12 February 2025. doi:10.2519/jospt.2025.12836.

Short-Term Effect of Spinal Manipulation on the Magnitude of Exophoria in Adults Who Are Asymptomatic: A Randomized Controlled Trial

OBJECTIVE

This study aimed to assess the immediate and short-term effects of cervical spinal manipulation (SM), compared with a placebo, on the magnitude of near and distance exophoria in adults with asymptomatic exophoria.

METHODS

In this single-blind, randomized controlled trial, individuals with a clinical diagnosis of horizontal exophoria confirmed with the prism alternating cover test (PACT) were allocated to a single intervention session using a high-velocity, low-amplitude cervical SM technique or a sham intervention (manual contact under the head). Outcomes were the magnitude of horizontal heterophoria, as a measure of binocular vision efficiency at near (40 cm) or distance (4 m) fixation, using the PACT. Evaluations were made at baseline, immediately after intervention, and at a 1-week follow-up.

RESULTS

From May to September 2021, 44 volunteers (23 women), with a mean age of 35 (SD = 9.5) years, were recruited and equally distributed into the study groups. All participants completed follow-up assessments, and no adverse events were reported. There was a significant time × group interaction for exophoria at near vision, but not at distance fixation. The SM group showed a significant decrease of near exophoria compared with the control group at the 1-week follow-up (mean difference = -1.09 prism diopters; 95% CI = -0.20 to -1.98 prism diopters).

CONCLUSION

The use of cervical SM therapy resulted in a significant reduction of the magnitude of horizontal exophoria at near vision (medium effect size), compared with the placebo, in young adults who are asymptomatic. However, these effects were not observed at distance fixation and should be considered cautiously due to the pre-post design with a single intervention session and the short-term follow-up.

IMPACT

The findings suggest short-term benefits of SM therapy can manage undiagnosed ocular convergence disorders, although changes were not clinically relevant.

A retrospective analysis of the incidence of severe adverse events among recipients of chiropractic spinal manipulative therapy

This study examined the incidence and severity of adverse events (AEs) of patients receiving chiropractic spinal manipulative therapy (SMT), with the hypothesis that < 1 per 100,000 SMT sessions results in a grade ≥ 3 (severe) AE. A secondary objective was to examine independent predictors of grade ≥ 3 AEs. We identified patients with SMT-related AEs from January 2017 through August 2022 across 30 chiropractic clinics in Hong Kong. AE data were extracted from a complaint log, including solicited patient surveys, complaints, and clinician reports, and corroborated by medical records. AEs were independently graded 1-5 based on severity (1-mild, 2-moderate, 3-severe, 4-life-threatening, 5-death). Among 960,140 SMT sessions for 54,846 patients, 39 AEs were identified, two were grade 3, both of which were rib fractures occurring in women age > 60 with osteoporosis, while none were grade ≥ 4, yielding an incidence of grade ≥ 3 AEs of 0.21 per 100,000 SMT sessions (95% CI 0.00, 0.56 per 100,000). There were no AEs related to stroke or cauda equina syndrome. The sample size was insufficient to identify predictors of grade ≥ 3 AEs using multiple logistic regression. In this study, severe SMT-related AEs were reassuringly very rare.