中国内地2型糖尿病患者胃转流术后1年疗效的Meta分析

目的系统评价中国内地2型糖尿病患者胃转流术后1年疗效。方法计算机检索Cochrane图书馆临床对照试验资料库、MEDLINE、EMbase、CBM和CNKI中有关中国内地胃转流手术治疗2型糖尿病(T2DM)的随机对照试验或自身前后对照试验,检索时限均从建库至2012年2月,并手工检索相关杂志,对所获文献的参考文献进行回溯性检索和引文检索。由两位研究者按纳入与排除标准独立进行文献筛选、资料提取和质量评价后,采用RevMan 5.1.0软件进行Meta分析。结果最终纳入6个自身前后对照试验,共131例患者,方法学质量总体不高。Meta分析结果显示,T2DM患者胃转流术后1年的空腹血糖水平[SMD=–2.55,95%CI(–3.40,–1.69),P<0.000 01]及糖化血红蛋白水平[SMD=–1.98,95%CI(–2.33,–1.62),P<0.000 01]均较术前明显降低,但空腹胰岛素水平与术前差异无统计学意义[SMD=–2.03,95%CI(–4.41,0.35),P=0.10]。敏感性分析显示本研究结果较稳定,但漏斗图分析提示可能存在发表偏倚。结论中国内地T2DM患者胃转流术后1年的空腹血糖水平及糖化血红蛋白水平均较术前降低;但空腹胰岛素水平未改善。由于纳入研究的数量少、样本量小且质量不高,故上述结论仅供参考,尚需高质量大样本长期随访临床试验验证。

One-Year Postoperative Effects of Gastric Bypass on Type 2 Diabetes in Mainland China:A Meta-Analysis

Objective To assess the therapeutic effect of gastric bypass on type 2 diabetes mellitus (T2DM) after a one-year treatment in Mainland China. Methods Databases including The Cochrane Central Register of Controlled Trials, MEDLINE, EMbase, CBM and CNKI were searched from inception to February 2012, and the relevant journals and references of articles were also searched to collect randomized controlled trials (RCTs) or before-after self-controlled trials on gastric bypass in treating T2DM in Mainland China. Two reviewers independently screened articles according to the predefined inclusion and exclusion criteria, extracted data, and evaluated quality of the included studies. Then meta-analyses were performed using RevMan 5.1.0. Results A total of 6 before-after self-controlled trials involving 131 patients were finally included. All these trials were graded as low quality. The results of meta-analysis showed that the therapeutic effect of gastric bypass on T2DM after a one-year treatment was good. There were significant reductions in both fasting plasma glucose (1 year: SMD=–2.55, 95%CI –3.40 to –1.69, P<0.00001) and glycosylated hemoglobin (1 year: SMD=–1.98, 95%CI –2.33 to –1.62, P<0.00001); there was no marked change in fasting insulin (SMD=–2.03, 95%CI –4.41 to 0.35, P=0.10). Sensitivity analysis indicated that these results were stable, but funnel-plots indicated possible publication bias existed. Conclusion One year after gastric bypass, T2DM patients in Mainland China get reduced in both fasting plasma glucose and glycosylated hemoglobin, but get no improvement in fasting insulin. However, this conclusion still needs to be further proved by more high-quality and large-scale clinical trials with long-term follow-up because of the limitation of quantity, scale and quality of the included studies.