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Erschienen in: Journal of Orthopaedic Surgery and Research 1/2022

Open Access 01.12.2022 | Systematic Review

Acupuncture in chronic aspecific low back pain: a Bayesian network meta-analysis

verfasst von: Alice Baroncini, Nicola Maffulli, Jörg Eschweiler, Friedrich Molsberger, Alexandra Klimuch, Filippo Migliorini

Erschienen in: Journal of Orthopaedic Surgery and Research | Ausgabe 1/2022

Abstract

Background

This Bayesian network meta-analysis investigated the available randomized control trials (RCTs) to point out which acupuncture protocol is the most effective for chronic aspecific low back pain (LBP). Efficacy was measured in terms of pain (Visual Analogic Scale, VAS) and disability (Roland Morris Disability Questionnaire, RMQ), Transcutaneous Electrical Nerve Stimulation (TENS).

Methods

PubMed, Google scholar, Embase, and Scopus were accessed in March 2022. All the RCTs comparing two or more acupuncture modalities for aspecific chronic LBP were accessed. Only studies which investigated the efficacy of acupuncture on patients with symptoms lasting a minimum of 1.5 months, or with at least three episodes in the previous 12 months, were considered eligible. The Review Manager Software (The Nordic Cochrane Collaboration, Copenhagen) was used for the methodological quality assessment. The STATA Software/MP, Version 14.1 (StataCorporation, College Station, Texas, USA), was used for the statistical analyses. The NMA was performed through the STATA routine for Bayesian hierarchical random-effects model analysis.

Results

Data from 44 RCTs (8338 procedures) were retrieved. 56% of patients were women. The mean age of the patients was 48 ± 10.6 years. The mean BMI was 26.3 ± 2.2 kg/m2. The individual group (95% confidence interval (CI) 2.02, 7.98) and the standard combined with TENS (95% CI 2.03, 7.97) demonstrated the highest improvement of the RMQ. The VAS score was lower in the standard combined with TENS group (95% CI 3.28, 4.56). Considering the standard acupuncture group, different studies used similar protocols and acupuncture points and the results could thus be compared. The equation for global linearity did not find any statistically significant inconsistency in any of the network comparison.

Conclusion

Verum acupuncture is more effective than sham treatment for the non-pharmacological management of LBP. Among the verum protocols, individualized acupuncture and standard acupuncture with TENS were the protocols that resulted in the highest improvement in pain and quality of life.

Level of Evidence

Level I, Bayesian network meta-analysis of RCTs.
Hinweise

Publisher's Note

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Abkürzungen
RCTs
Randomized control trials
LBP
Low back pain
VAS
Visual analogic scale
RMQ
Roland Morris disability questionnaire
PRISMA
Preferred reporting items for systematic reviews and meta-analyses
BMI
Body mass index
ANOVA
Analysis of variance
NMA
Network meta-analysis
STD
Standardized mean difference
CI
Confidence interval
PrI
Percentile interval

Introduction

Low back pain (LBP) is common, leading to relevant economic burden [1, 2]. On average, the lifetime prevalence of LBP is as high as 80% [3, 4]. LBP is aspecific in most cases, and no pathoanatomical cause can be found [5]. In such patients, management aims to reduce symptoms and disability, allowing the return to daily life activities and participation in physiotherapy [5]. Current guidelines recommend physiotherapy as a first-line treatment for chronic LBP [6]. As some patients do not experience sufficient benefit from physiotherapy alone, further options are required. Pharmacotherapy is the second step in the management of chronic aspecific LBP [6]. NSAIDs and opiates represent the most successful treatment options [7, 8]. However, potential side-effects of pharmacotherapy, along with the risk of opioids addiction, make this option viable and safe only in the short term. As the number of patients with chronic aspecific LBP increases, so does the demand for safe and effective therapies. Among these, acupuncture has been widely investigated in recent times as possible options, proving to be a safe and effective therapy for chronic aspecific LBP [911]. Many different acupuncture protocols have been proposed for the management of chronic aspecific LBP. This Bayesian network meta-analysis investigated the available randomized control trials (RCTs) to try and identify which acupuncture protocol is the most effective for chronic aspecific LBP. Efficacy was measured in terms of pain (Visual Analogic Scale, VAS) and disability (Roland Morris Disability Questionnaire, RMQ) to investigate the efficacy of acupuncture on different aspects of the patients’ overall quality of life.

Material and methods

Search strategy

This Bayesian network meta-analysis was conducted according to the PRISMA extension statement for reporting of systematic reviews incorporating network meta-analyses of healthcare interventions [12]. A guide protocol was preliminary drafted:
  • P (population): Chronic low back pain;
  • I (intervention): Acupuncture;
  • C (comparison): Standardized, sham, individual, auricular, electroacupuncture, acupuncture combined with Transcutaneous Electrical Nerve Stimulation (TENS);
  • O (outcomes): VAS, RMQ.

Data source and extraction

Two authors (A.M. and A.B.) independently performed the literature search in April 2022. The following databases were accessed: PubMed, Google scholar, Embase, and Scopus. The following keywords were used in combination: low, lumbar, back, lower, spine, pain, disability, management, therapy, treatments, acupuncture, auricular, tens, electroacupuncture, auricular, individualized, standardized, visual analogic scale, vas, Roland Morris questionnaire. The same authors independently performed the initial screening. If the title and abstract matched the topic, the article full-text was accessed. A cross reference of the bibliographies was also performed. Disagreement was debated and solved by a third author (N.M.).

Eligibility criteria

All the RCTs comparing two or more acupuncture modalities for aspecific chronic LBP were accessed. Only studies which investigated the efficacy of acupuncture on patients with symptoms lasting a minimum of 1.5 months, or with at least three episodes in the previous 12 months were considered eligible. Only studies involving patients aged 18 to 75 were considered. Aspecific LBP was defined as pain that was not arising from a specific pathoanatomical condition [5]. Given the authors language capabilities, articles in English, German, Italian, French and Spanish were eligible. Only level I of evidence studies, according to Oxford Centre of Evidence-Based Medicine [13], were considered. Studies reporting data over acupressure or percutaneous electrical nerve stimulation were not considered. Studies reporting the efficacy of acupuncture in patients with acute pain were not included, nor were those investigating the cervicothoracic segments. Studies investigating patients with neurological deficits were excluded, along with studies including patients with radicular pain (unless the radicular pain was only a minor complaint). Editorials, reviews, letters, opinion, technical notes, comments were not eligible, nor were biomechanical, cadaveric, or animal studies. Only articles reporting quantitative data under the outcomes of interest were considered for inclusion. Missing data under the outcomes of interest warranted exclusion from this study.

Data extraction

Two authors (A.M. and A.B.) independently performed data extraction the resulting articles for inclusion. Study generalities (author, year, journal, design, length of the follow-up) and patient demographic at baseline were extracted (number of samples and related mean BMI and age, percentage of female). For every treatment, the following data were retrieved: VAS, RMQ, adverse events. The groups considered were standard acupuncture alone, standard acupuncture with TENS, electroacupuncture, individualized acupuncture, and auricular acupuncture. The treatment group was classified as individualized acupuncture when the treating physician chose the needling points for each patient, without following a specific protocol. The treatment was defined as standard acupuncture when all patients were treated with the same protocol. Sham acupuncture was defined as the needling of points other than the known acupuncture points: as shallow needling of acupuncture points may also elicit a fibroblast reaction, this method was considered as a form of verum acupuncture [14]. The association of acupuncture with electrostimulation was considered separately.

Risk of bias assessment

The risk of bias assessment was conducted by two authors (A.M. and A.B.) independently. The Review Manager Software (The Nordic Cochrane Collaboration, Copenhagen) was used for the methodological quality assessment. The following risk of bias were evaluated: selection, detection, reporting, attrition, and other source of bias. For each comparison, the risk of bias was investigated using funnel plots. Plot asymmetries relates to greater risk of bias.

Statistical analysis

The statistical analyses were conducted by the senior author (F.M.). Baseline comparability was assessed through the IBM SPSS software. The analysis of variance (ANOVA) was used for analysis, with P values > 0.1 considered satisfactory. All other treatments rather than standardized, individual, auricular, electroacupuncture, combined with TENS, sham acupuncture were included in the “control group” and excluded from the analysis. The STATA Software/MP, Version 14.1 (StataCorporation, College Station, Texas, USA) was used for the statistical analyses. The NMA was performed through the STATA routine for Bayesian hierarchical random-effects model analysis. The inverse variance method was used for analysis, with standardized mean difference (STD) effect measure. The overall inconsistency was evaluated through the equation for global linearity via the Wald test. If the P value < 0.5, the null hypothesis cannot be rejected, and the consistency assumption could be accepted at the overall level of each treatment. Both confidence (CI) and percentile (PrI) intervals were set at 95%. For each comparison, edge plots were performed to display amount and interpolations of direct comparisons; interval plots were performed to rank the treatments according to their effect measure; and asymmetry of the funnel plots was associated with the greater risk of publication bias.

Results

Search result

The literature search resulted in 817 RCTs. Four hundred and seven were excluded as they were duplicates. A further 330 studies were incompatible with the eligibility criteria: type of study (N = 89), not matching the topic of interest (N = 193), acupressure or percutaneous electrical nerve stimulation (N = 15), acute LBP (N = 11), concerning cervicothoracic segments (N = 5), presence of severe neurologic impairment or spine deformities (N = 3), acute setting (N = 2), old age (N = 1), language limitations (N = 2), other (N = 9). Another 13 studies were excluded as they did not report quantitative data under the outcomes of interest. This left 44 RCTs for the present study. The literature search results are shown in Fig. 1.

Methodological quality assessment

Given the randomized design of the included studies, the risk of selection bias was low. Assessor blinding was performed in 75% (33 of 44) studies; however, the blinding methods were often biased, and the overall risk of detection bias was moderate. The risk of attrition and reporting biases were low to moderate, as was the risk of other bias. Concluding, the methodological quality assessment showed low to moderate risk of bias (Fig. 2).

Patient demographics

Data from 8338 procedures were retrieved. 56% of patients were women. The mean age of the patients was 48 ± 10.6 years. The mean BMI was 26.3 ± 2.2 kg/m2. The ANOVA test found moderate baseline comparability in symptoms duration (P > 0.05). Patient demographics are shown in Table 1.
Table 1
Generalities and patient baseline of the included studies
Author, year
Journal
Treatment
Type of protocol
Patients (n)
Follow-up (months)
Mean age
Women (%)
Mean BMI
Brinkhaus et al. [15]
Arch Intern Med
Individualized
12 sessions of 30 min over 8 weeks (2 sessions in each of the first 4 weeks, followed by 1 session per week in the remaining 4 weeks)
147
13
59.1
64
26.7
Sham
75
58.2
75
26.2
Control
Patients in the waiting list group did not receive acupuncture treatment for 8 weeks after randomization
79
58.9
68
26.9
Camilotti et al. [16]
Fisioter. Mov
Physiotherapy/ Aquatic Therapy
Twice a week
15
 
61.7
 
27.8
Auricular/scalp/standardized
15
57.3
 
27.6
Control
 
14
61.2
 
28.7
Ceccherelli et al. [17]
The Clinical Journal of Pain
Standardized
8 sessions for 20 min; the first four sessions were carried out in 2 weeks, whereas the remaining four sessions were carried out once per week
21
3
41.7
24
 
Individualized
21
41.6
33
 
Cherkin et al. [18]
Arch Intern Med
Individualized
Up to 10 massages or acupuncture treatments over 10 weeks were permitted
94
12
45.3
52
 
Control
78
45.7
69
 
Control
 
90
43.8
56
 
Cherkin et al. [19]
Arch Intern Med
Individualized
2 treatments weekly for 3 weeks; then once weekly for 4 weeks
157
13
47.0
68
 
Standardized
158
49.0
56
 
Sham
162
47.0
60
 
Usual care
Patients received no study-related care; just the care, if any, they and their physicians chose (mostly medications, primary care, and physical therapy visits)
161
46.0
64
 
Cho et al. [20]
Spine
Individualized
12 acupuncture sessions
(approximately 2 times a week for 6 weeks)
65
6
42.4
83
23.9
Sham
65
41.8
86
24.2
Comachio et al. [21]
Journal of Acupuncture and Meridian Studies
Individualized
1-h sessions, twice a week for 6 weeks
33
3
49.0
70
26.9
Electroacupuncture
33
46.0
58
26.0
Di Cesare et al. [22]
Complementary Therapies in Medicine
Control
1 injection per week for 4 weeks
29
3
52.5
55
 
Standardized
33
52.5
55
 
Giles et al. [23]
Journal of Manipulative and Physiological Therapeutics
Individualized
15- to 20-min appointments with subsequent low-volt electrical stimulation applied to the needles, 6 treatments applied in a 3- to 4-week period, (mean 6 treatments)
20
0
46.5
65
 
Control
Pills given for the defined 3- to 4-week treatment period, (mean 2 prescriptions)
21
35.0
81
 
Control
15 to 20-min appointments, 6 treatments applied in a 3- to 4-week period, (mean 6 treatments)
36
42.5
47
 
Giles et al. [24]
Spine
Standardized
20-min appointments, 2 treatments per week, maximum treatment duration of 9 weeks
36
12
37.5
44
25.8
Control
Maximum treatment duration of 9 weeks
43
39.0
43
25.8
Control
20-min appointments, 2 treatments per week, maximum treatment duration of 9 weeks
36
39.0
49
25.8
Grant et al. [25]
Pain
Individualized
2 sessions of manual acupuncture weekly for 4 weeks
30
3
75.0
  
TENS
27
72.0
  
Haake et al. [26]
Arch Intern Med
Individualized
Ten 30-min sessions, generally 2 sessions per week, and 5 additional sessions if, after the tenth session, patients experienced a 10% to 50% reduction in pain intensity
387
6
49.6
57
26.9
Sham
387
49.2
64
26.5
Control
 
388
51.3
58
26.3
Hasegawa et al. [27]
Acupunct Med
Standardized
5 sessions during 28 days
40
0
47.0
63
 
Sham
40
43.9
65
 
Hunter et al. [28]
Clin J Pain
Physiotherapy
Supervised group exercise session lasting for 1 h a week for 6 weeks
27
6
43.2
59
 
Auricular
Manual AA for the first 6 weeks of the trial before each exercise session
24
42.4
67
 
Inoue et al. [29]
Acupunct Med
Individualized
Once
15
 
68.0
27
 
Sham
16
70.0
38
 
Itoh et al. [30]
Complementary Therapies in Clinical Practice
Standardized
1 weekly treatment over 5 weeks
7
2.5
 
63
 
TENS
7
 
Acupuncture and TENS
7
 
Control
No specific treatment
7
 
Itoh et al. [31]
Acupunct Med
Individualized
2 phases of 3 weeks, 12 weeks in total. Each patient received a total
of six 30 min treatments, one per week
9
2.75
70.1
71
 
Individualized
9
71.9
 
Standard
9
73.8
 
Itoh et al. [30]
Complementary Therapies in Clinical Practice
Standardized
5 treatments, once per week
8
2.5
 
63
 
TENS
8
 
Acupuncture and TENS
8
 
Control
 
8
 
Kalauokalani et al. [32]
Spine
Control
Up to 10 treatments within 10 weeks
 
0
   
Individualized
    
Control
     
Control
 
66
45.0
70
 
Control
 
69
43.0
57
 
Kennedy et al. [33]
Complementary Therapies in Medicine
Individualized
Once or twice a week; min 3 and max 12 treatments over 4–6 weeks
23
3
46.5
46
 
Sham
22
44.6
58
 
Kerr et al. [34]
Clin J Pain
Standard
The treatment program consisted of 6 of these sessions over a 6-week period. This reflected the routine pattern of attendance for outpatient physiotherapy. Patients were given a leaflet regarding their low back pain that included standardized advice and exercises
26
1.5
42.6
50
 
Placebo-TENS
20
42.8
65
 
Leibing et al. [35]
Pain
Standardized
20 sessions (each 30 min) of traditional and standardized acupuncture over 12 weeks, plus active physiotherapy. In the first 2 weeks of treatment, acupuncture was done five times a week, and in the next 10 weeks once a week. Plus physiotherapy 26 sessions (each 30 min) over 12 weeks
40
13
47.9
55
26.1
Sham
20 sessions (each 30 min) of minimal acupuncture over 12 weeks, plus active physiotherapy 26 sessions (each 30 min) over 12 weeks
45
49.0
60
25.9
Control
Active physiotherapy with no other treatment 26 sessions (each 30 min) over 12 weeks
46
47.5
59
26.9
Liu et al. [36]
Clin Rehab
Standardized
Usual care + assigned acupuncture intervention according to group allocation. 30-min treatment sessions were administered twice weekly
15
3
30.0
60
23.9
Standardized
15
37.1
60
27.0
Standardized
15
30.8
73
27.4
Luo et al. [37]
Journal of traditional Chinese medicine
Auricular
18 treatments were provided over 7 weeks
54
6
39.0
20
 
Standardized
50
36.0
24
 
Control
48
37.0
19
 
Macdonald et al. [38]
Annals of the Royal College of Surgeons of England
Individualized
Over a short period of time once a week. The maximum number of treatments between the two assessments was arbitrarily defined as 10
8
0
 
75
 
Control
9
 
67
 
Mendelson et al. [39]
The American Journal of Medicine
Standardized
4 weeks of treatment, twice weekly
36
1
54.5
47
 
Control
41
53.6
56
 
Meng et al. [40]
Rheumatology
Standardized
In addition to standard therapy, subjects in this group received acupuncture treatments twice a week for 5 weeks, for a total of 10 sessions
31
2.25
72.0
58
 
Control
5 weeks
24
70.0
63
 
Miyazaki et al. [14]
Clin J Pain
Standardized
A washout period of at least 4 weeks took place between phases 1 and 2
42
 
20.8
 
22.7
Control
39
 
21.0
 
25.1
Molsberger et al. [41]
Pain
Sham
In addition to the daily conservative orthopedic therapy, all patients received 12 sham treatments, (30 min, 3/ week)
61
3
50.0
46
 
Standardized
In addition to the conventional conservative orthopedic therapy, 12 verum acupuncture treatments (30 min, 3/ week)
65
49.0
45
 
Control
These patients received the daily conventional conservative orthopedic treatment over 4 weeks
60
49.0
53
 
Pach et al.[42]
Evidence-Based Complementary and Alternative Medicine
Standardized
2 treatment sessions per week had to be applied, with a maximum number of 10 to 15 sessions depending on the patient’s individual needs. The needle retention time was about 25 min
78
6.5
59.3
54
27.2
Individualized
72
56.1
63
27.0
Rajfur et al. [43]
Medical science monitor
TENS
A series of 15 treatments, 5 times a week (Monday to Friday) for a period of 3 weeks
20
0
50.2
55
26.7
Acupuncture and TENS
20
52.1
60
27.0
Control
19
47.8
58
26.3
Control
21
48.7
62
26.1
Control
22
52.1
59
25.9
Control
Motor improvement exercises were used for 3 weeks, 5 times a week, from Monday to Friday
21
49.8
62
26.1
Sator-Katzenschlager [44]
Pain Medicine
Electroacupuncture
The acupuncture needles with the P-Stim™ devices were withdrawn 48 h after insertion in all cases and the acupuncture treatment was performed once a week for 48 h at home, for a total study period of 6 wk
61
1.5
54.1
71
26.6
Acupuncture
53.1
25.3
Shankar et al. [45]
Indian Journal of Physiology and Pharmacology
Electroacupuncture
10 treatments over 3 weeks
30
0
36.2
53
22.9
Control
10 days of Valdecoxib and 3 weeks of physiotherapy
30
34.5
80
22.0
Control
 
30
35.9
57
23.3
Szczurko et al. [46]
PLoS ONE
Acupuncture
Twice per week to receive 24 treatments over a period of 12 weeks
39
3
45.3
56
28.7
Control
Participants randomized to the control group received an educational booklet (causes of back pain, prognosis, appropriate use of imaging studies and specialists, and exercises for promoting recovery and preventing recurrences)
36
48.0
44
27.7
Thomas et al. [47]
BMJ
Individualized
10 individualized treatment sessions over 3 months
159
24
42.0
62
 
Control
Patients in the usual care group received NHS treatment according to their general practitioner’s assessment of need
80
44.0
58
 
Witt et al. [48]
American J Epidemiology
Individualized
Maximum of 15 acupuncture sessions over 3 months
1451
6
53.1
58
 
Control
Conventional therapy
1390
52.6
57
 
Yeung et al. [49]
Journal of Alternative and Complementary Medicine
Control
An hourly session each week for 4 consecutive weeks + daily 15 months of home exercise
26
3
55.6
81
24.2
Standardized
EA three times/ week, 4 weeks
26
50.4
85
25.5
Tsui et al. [50]
The journal of alternative and complementary medicine
Electroacupuncture
Treatment for 20 min on a total of 6 acupuncture points. Treatment was delivered twice per week for 4 weeks (a total of 8 sessions)
14
1
39.7
76
 
Electroacupuncture
14
39.1
71
 
Control
 
14
40.9
62
 
Tsukayama et al. [51]
Acupuncture in medicine
Electroacupuncture
Twice a week for 2 weeks
10
0
47.0
89
22.5
TENS
10
43.0
80
22.2
Weiß et al. [52]
The journal of alternative and complementary medicine
Standardized
21-day inpatient rehabilitation and acupuncture twice weekly
74
3
49.8
27
30.0
Control
21-day inpatient rehabilitation
69
51.7
39
28.8
Yoo et al. [53]
Journal of Korean Medicine Rehabilitation
Standardized
Treatment within 5 days. A total of 2 treatments
15
0
37.9
 
22.3
Sham
15
37.9
 
23.9
Yuan et al. [54]
Complementary Therapies in Medicine
Individualized
10 treatments; 2 times/week
15
12
43.5
40
27.0
10 treatments; 5 times/week
15
43.9
40
27.3
Yun et al. [55]
The Journal of Alternative and Complementary Medicine
Control
18 treatments were provided over 7 weeks, every other day for 3 weeks and then twice weekly for 4 weeks
64
11
35.0
22
 
Individualized
60
34.0
27
 
Control
 
63
33.0
19
 
Zaringhalam et al. [56]
Chinese Medicine Journal
Standardized
Twice a week for 5 weeks
20
2.5
54.2
0
32.5
Control
daily
20
55.1
29.2
Control
Twice a week for 5 weeks
20
54.2
30.3
Control
 
20
54.3
31.0

Outcomes of interest

The individual group (SMD 5.00; 95% CI 2.02, 7.98) and the standard combined with TENS (SMD 5.00; 95% CI 2.03, 7.97) demonstrated the highest improvement of RMQ. The VAS score was lower in the standard combined with TENS group (SMD 3.92; 95% CI 3.28, 4.56). Considering the standard acupuncture group, different studies utilized similar protocols and acupuncture points and the results could thus be compared. The equation for global linearity did not find any statistically significant inconsistency in any of the network comparisons. Edge, interval, and funnel plots are shown in Fig. 3.

Discussion

According to the main findings of the present Bayesian network meta-analysis, individualized acupuncture and the standard protocol with TENS may represent the most effective acupuncture strategies for the management of chronic aspecific LBP. These two treatment protocols showed the highest improvements of VAS and RMQ. As verum acupuncture scored better than sham treatment, the present study points to the efficacy of acupuncture in the management of aspecific chronic LBP. This finding further supports current guidelines which recommend acupuncture as one of the possible first-line, non-pharmacological management modality for aspecific chronic LBP [6].
These results are consistent with previous studies [10, 11], which observed a superiority of acupuncture compared to sham treatment [57, 58]. A meta-analysis by Amaral et al. observed only moderate-quality evidence in favor of acupuncture treatment for LBP; however, this study focused only on trigger point acupuncture in the geriatric population, and the results are not directly comparable with those of the present cohort [9]. Nascimiento et al. also observed poor outcomes for acupuncture for LBP in the geriatric population [59]. While no specific characteristics could be highlighted in patients who responded to acupuncture for chronic pain [60], the role of age on the effectiveness of the therapy in the setting of LBP deserves further investigation. A meta-analysis by Mu and colleagues found that acupuncture has only limited effect on pain relief and improvement of the quality of life in the immediate to short term [61]. Li et al. highlighted that a treatment duration of at least 5 weeks is required to achieve 80% of the maximum analgesic effect [62] of acupuncture. Thus, the relatively short timeframe considered by Mu et al. (one to 12 weeks) [61], along with the high risk of bias of the included studies [61], may explain the differences in the observed results. The literature regarding the use of acupuncture in the acute setting is limited and, so far, no studies have been directed to analyze the literature regarding different types of acupuncture for the treatment of acute LBP. Thus, a direct comparison of the presented results with those of the acute setting is not possible. Overall, acupuncture seems to be modestly effective for the management of acute LBP, and the available studies agree that more high-quality work are required to gain more evidence around this topic [63, 64]. Considering the reluctance of many physicians to prescribe acupuncture in patients with chronic LBP, it is fundamental to highlight the efficacy of this treatment in comparison with sham acupuncture. However, the finding that individualized treatment is more effective than standard treatment suggests that a precise diagnosis of chronic LBP according to the criteria of traditional Chinese medicine and the choice of specific acupuncture points may be key for the efficacy of the treatment. This result confirms the clinical experience of the authors. The association of standard protocols with TENS yielded however results similar to those of individualized acupuncture.
This study has several limitations. The most important limitation is the heterogeneous protocols used. Given the randomized design of patient allocation, the risk of selection bias was low. However, some studies did not perform patients or personnel blinding, thus increasing the risk of detection and performance biases, respectively. General health measures were seldom reported, as were also information about the duration of previous symptoms, and type of pain (e.g., central sensitization). Previous conservative strategies were barely reported. Given the lack of quantitative data, the ethnicity of the patients was not analyzed separately. Given the heterogeneity of the protocols used, it was not possible to analyze the effects of the associations of acupuncture with other treatments such as pharmacological management and physio- and psychotherapy. Also, some acupuncture techniques such as moxibustion, cupping or scalp acupuncture were excluded from the study as the available data were not sufficient to grant inclusion. As a multimodal approach is often advisable to tackle the different organic and psychosocial aspects of chronic LBP [6, 6568], further studies will be required to investigate the efficacy of different treatment associations and protocols. Furthermore, the available studies only allowed for a precise analysis of the effects of acupuncture in the population < 75 years old: targeted studies for this segment of the population will be required to investigate the efficacy of acupuncture in the elderly.

Conclusion

Verum acupuncture is more efficient than sham treatment for the non-pharmacological management of LBP. Among verum protocols, individualized acupuncture and standard acupuncture with TENS were the protocols that allowed for the highest improvement in pain and quality of life. 

Acknowledgements

None

Declarations

Not applicable.
Not applicable

Competing interests

Professor Maffulli is Editor in Chief of the Journal of Orthopaedic Surgery and Research.
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Metadaten
Titel
Acupuncture in chronic aspecific low back pain: a Bayesian network meta-analysis
verfasst von
Alice Baroncini
Nicola Maffulli
Jörg Eschweiler
Friedrich Molsberger
Alexandra Klimuch
Filippo Migliorini
Publikationsdatum
01.12.2022
Verlag
BioMed Central
Erschienen in
Journal of Orthopaedic Surgery and Research / Ausgabe 1/2022
Elektronische ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-022-03212-3

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