Objective To compare and evaluate the sensitivity, specificity, accuracy, negative and positive predictive values, negative and positive likelihood ratios of colposcopically directed biopsy and diagnostic cone biopsy in patients with cervical intraepithelial neoplasia. Methods We searched PubMed, CBMdisc, CMCC, CNKI, and VIP to March 2004, and Cochrane Library (Issue 4, 2003). Related journals published from 1970 to 2003 and unpublished papers were hansearched. Diagnostic studies which employed colposcopically directed biopsy or diagnostic cone biopsy and compared with golden standard (pathological diagnosis of specimens obtained through therapeutic conization or hysterectomy) were included and meta-analysis was performed. Participants were clinically suspected of pre-cancerous cervical lesions. Quality of studies was assessed, and SROC curve by Diagnostic and Screening Group of the Cochrane Collaboration was used to perform meta-analysis. Parameters were sensitivity, specificity, accuracy, predictive values, and likelihood ratio. Results Twenty six studies (3 376 patients ranging from 2 to 604 patients/per study) met the inclusion criteria. The quality of studies was generally poor.Before sensitivity analysis, superiority of diagnostic cone biopsy (sensitivity and specificity: 0.83) was shown over colposcopically directed biopsy (sensitivity and specificity: 0.76) (P＜0.001); while after sensitivity analysis the results reversed (sensitivity of diagnostic cone biopsy was 0.58 and its specificity was 0.61; sensitivity and specificity of colposcopically directed biopsy increased to 0.84) (Plt;0.001). Conclusions No definite conclusioncan be drawn as to which method is superior. To make further analysis, more studies with high quality are needed.
目的 探讨电子阴道镜在宫颈病变诊断中的价值。 方法 对2001年1月-2006年12月786例宫颈病变患者的阴道镜下行病检结果和巴氏刮片细胞学诊断结果进行对比性研究。 结果 慢性宫颈炎、宫颈上皮内瘤样病变和宫颈癌在阴道镜下图像均呈多样性；阴道镜诊断宫颈癌前病变及宫颈癌的正确率、灵敏度及特异度均高于宫颈巴氏刮片，差异有统计学意义(Plt;0.05)。 结论 阴道镜操作灵活简便，在宫颈病变的诊断中有较大价值，其图像管理系统更有利于宫颈病变的动态观察和随访。