Prior Acupuncture Experience Does Not Alter Efficacy for Discogenic Sciatica

Effect of prior acupuncture experience on the clinical efficacy of acupuncture for discogenic sciatica

This report summarizes a secondary analysis of a multicenter randomized controlled trial that assessed whether prior acupuncture experience modifies the clinical response to acupuncture in patients with discogenic sciatica. The analysis used data from 216 randomized patients and compared outcomes between an active acupuncture protocol and a sham acupuncture control.

Study design and participant allocation

A total of 216 patients diagnosed with discogenic sciatica were randomized into two equal groups: 108 to the acupuncture group and 108 to the sham acupuncture group. The secondary analysis stratified participants by their self-reported history of prior acupuncture exposure: 81 patients had prior acupuncture experience and 135 had no prior acupuncture experience. The trial was conducted across multiple centers and the analysis presented here focuses on changes in pain and function over a 4-week treatment period.

Acupuncture and sham intervention protocols

The acupuncture group received a semi-standardized treatment based on meridian pattern differentiation for selection of acupoints. Practitioners applied manual manipulation with the aim of eliciting the classical deqi sensation. In contrast, the sham acupuncture group received needling at non-acupoints without manual manipulation and without pursuit of deqi. Each needling session in both groups lasted 30 minutes.

Treatment schedule and outcome measures

Treatment continued for 4 weeks. The schedule was three sessions per week for the first 2 weeks and two sessions per week for the subsequent 2 weeks. Primary outcome measures were the change from baseline to week 4 in:

• Leg pain intensity measured by the visual analog scale (VAS), and
• Lumbar function measured by the Oswestry Disability Index (ODI).

These change scores were used to evaluate the clinical efficacy of acupuncture compared with sham acupuncture and to assess whether prior acupuncture experience modified those effects.

Subgroup analysis by prior acupuncture experience

Patients were grouped by reported prior acupuncture exposure (yes or no). Within each subgroup, outcomes after 4 weeks of intervention were compared between the acupuncture and sham acupuncture arms. The analysis aimed to determine whether the magnitude of benefit from acupuncture differed according to previous acupuncture experience.

Statistical findings and interaction analysis

In both the subgroup of patients with prior acupuncture experience and the subgroup without prior experience, the acupuncture group demonstrated significantly greater improvements in leg pain (VAS) and lumbar function (ODI) after 4 weeks compared with the sham acupuncture group. Reported P values indicated statistical significance (P < 0.001 and P < 0.01 for reported comparisons).

An interaction analysis tested whether the effect of the intervention on VAS and ODI change scores depended on prior acupuncture experience. The interaction analysis showed no significant interaction between prior acupuncture experience and treatment allocation for either VAS or ODI change scores, indicating that prior acupuncture experience did not materially alter the treatment effect observed with acupuncture.

Conclusions and reported limitations

The authors conclude that acupuncture produces favorable improvements in leg pain and lumbar dysfunction for patients with discogenic sciatica, and that these benefits are present regardless of whether patients had prior acupuncture experience. The abstract reports the primary efficacy findings and the lack of interaction effect but does not provide further detail on adverse events, longer-term follow-up beyond 4 weeks, or granular subgroup characteristics; those details were not reported in the source abstract.

Conflict of interest

All authors declared no conflicts of interest in the published report.

Notes on interpretation

• The analysis is a secondary analysis of an RCT and reports short-term outcomes at 4 weeks using VAS and ODI change scores as primary endpoints.
• The acupuncture intervention emphasized meridian-based point selection and eliciting deqi, which contrasts with sham needling at non-acupoints without manipulation.
• The absence of a reported interaction suggests the observed superiority of acupuncture over sham for pain and function was consistent across patients with and without prior acupuncture exposure, according to the data presented in the abstract.
• The abstract does not report safety data, long-term outcomes, or effect sizes and confidence intervals; those details would require consulting the full text for comprehensive evaluation.