Abstract
Cumulative evidences indicate that acupuncture may ameliorate the symptoms of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). However, the long-lasting effects of acupuncture on CP/CPPS has not been fully evaluated. The objective of this study is to assess the sustained effects of acupuncture on CP/CPPS. We searched PubMed, EMBASE, and CENTRAL databases for studies on the use of acupuncture in patients with CP/CPPS. Studies with long-term follow-up periods were included. Single-arm meta-analyses were performed using random-effects model. The primary outcome was the response rate at the end of follow-up period; the secondary outcomes were changes of the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) scores at the end of follow-up, including total score and 3 sub-scores (pain, urinary, and quality of life). Six studies with 310 patients were performed in data synthesis, among which four studies were randomized controlled trials (RCT) and two were case series studies. At the end of follow-up, the weighted "average" response rate was 68.4% (95% CI: 42.1% to 89.5%, n=226; I2=93.5%); the change of NIH-CPSI total score were -14.8 (95% CI: -17.0 to -12.6, n=310; I2=92.1%); the change of pain, urinary, and quality of life sub-scores were -6.0 (95% CI: -6.9 to -5.2, n=266; I2=83.6%), -2.6 (95% CI: -3.2 to -2.0, n=266; I2=87.9%), and -4.4 (95% CI: -6.2 to -2.6, n=266; I2=98.7%), respectively. The source of heterogeneity could not be identified owing to insufficient studies. Acupuncture may have clinically long-lasting benefits for CP/CPPS. However, current evidence is limited owing to insufficient data and significant heterogeneity. Further studies with larger sample size and long-term follow-up periods are warranted.
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