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老年NSCLC患者化疗耐受性meta分析

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肺癌占各种恶性肿瘤发病率之首位,每年约有135万新诊断的肺癌患者,死亡118万[1]。非小细胞肺癌(NSCLC)约占肺癌发病率的80%~85%[2]。据美国国立癌症研究所流行病学监测结果报告:NSCLC在65岁以下人群的发病率是20.2/10万,65岁以上人群的发病率是306.1/10万,被诊断为NSCLC的患者50%超过65岁,其中70岁以上的病例占30%,NSCLC是一种老年疾病[3-6]。对于老年癌症患者的定义目前仍然存在争议,流行病学通常将65岁以上的患者称之为老年人,在肿瘤学常将70岁以上的患者定义为老年患者[7],对老年nsclc的化疗是临床医生面对的重要课题之一。由于老年人伴随着年龄的增长器官功能衰退、药代酶活性下降等生理因素,常合并其他疾病等原因,老年人的药效学和药动学也随之发生变化[8],老年NSCLC化疗的潜在毒性危险可能增加。目前国内外对老年NSCLC化疗的研究很少,而且结果不一,因此笔者对国外的一些资料进行Meta分析,以期为老年NSCLC化疗提供参考。

1 资料与方法

1.1 纳入和排除标准 资料纳入标准:①公开发表的原始文献;②随机、对照的临床研究或设计良好的非随机临床研究;③年龄组群

1.2 文献检索 在MEDLINE以ElderNSCLCCherotherapy 为关键词, 限定为英文、年龄≥65岁和≥80岁、最近10年(1997-2007)公开发表的文献,共检索到全文542篇, 按纳入和排除标准筛选出7篇文献。检索结果见表1[9-16]。

选中的4号文献(Schild SE 2003)虽然化疗联合了同步放疗,但是对本文的最终结果无影响,纳入研究;第1和2号(Chen YM 2000和Chen YM 2002)、第4和6号(Schild SE 2003 和Schild SE 2005)资料是同一作者研究同一问题,在分析中按就近原则只选用年代最近的资料。

1.3 研究对象 老年NSCLC化疗耐受性研究主要涉及化疗毒性反应,在研究中对毒性反应(Leukopenia、netropenia、anemia、thrombocytopenia、Nausea/vomiting、neurotoxicity、infection)进行了分层分析。

1.4 暴露因素和干预措施 本研究是对公开发表的文献应用Review Manager4.2软件进行Meta分析,我们以≥70岁界定为老年患者,研究的最终目的主要是老年NSCLC患者对化疗耐受性,年龄为暴露因素和干预措施。

1.5 统计学方法 应用Cochrane协作网系统提供的Review Manager4.2软件完成统计分析。

2 结果

2.1 异质分析 分析结果显示, Leukopenia,P=0.09; netropenia , P=0.51;anemia,P=0.34;thrombocytopenia,P=0.38;Nausea/vomiting,P=0.45;neurotoxicity,P=0.10;infection,P=0.23;所有P>0.05,因此认为各研究同质性较好,可用固定效应模型进行分析。

2.2 结果分析

2.2.1 ≥3度Leukopenia 见图1,4组资料共1171例,第2组资料(Langer CJ 2002)OR=0.38,95%CI 0.23-0.64,位于垂直线左侧,

2.2.2 ≥3度netropenia 见图2,共1104例,合并OR=1.46,95%CI 1.04-2.05,位于垂直线的右侧,Z=2.20(P=0.03),有统计学意义,≥3度netropenia

3 讨论

化疗是治疗NSCLC的重要方法之一,尤其是对晚期NSCLC化疗能够延长患者的生存期。资料显示化疗对患者年龄的选择上除外

本研究0.05);白细胞减少发生率≥70岁患者高于

4 结论

≥75岁NSCLC患者接受化疗与

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