Comparison of Four Methods in the Diagnosis of Bone Tuberculosis
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摘要:
目的 探讨涂片抗酸染色、TB-DNA、Xpert MTB/RIF、结核菌培养等4种检测方法对骨结核诊断的价值对比。 方法 对骨外科1 a内住院骨质破坏患者的病灶周围脓液,用4种检测方法进行检测,并对结果进行统计分析,指标包括:灵敏度、特异度、阳性预测值、阴性预测值。 结果 研究对象中以临床诊断为金标准,脓液涂片查抗酸杆菌灵敏度为31.75%,特异度为100.00%,阳性预测值100.00%,阴性预测值53.74%,约登指数为0.32;TB -DNA灵敏度为88.89%,特异度为98.00%,阳性预测值98.25%,阴性预测值87.50%,约登指数为0.87;Xpert MTB/RIF灵敏度为95.23%,特异度为68.00%,阳性预测值78.95%,阴性预测值91.90%,约登指数为0.63;脓液结核菌培养灵敏度为41.27%,特异度为100.00%,阳性预测值100.00%,阴性预测值57.47%,约登指数为0.41,(χ2=77.354,P < 0.005)4种检测方法差异具有统计学意义。 结论 4种检测方法中,TB-DNA灵敏度和特异度较好,Xpert MTB/RIF灵敏度较好,TB-DNA和Xpert MTB/RIF的真实性较好,同时阳性预测值和阴性预测值较高,对骨结核的诊断具有较好的价值。 -
关键词:
- 涂片抗酸染色 /
- 结核分枝杆菌基因 /
- 结核分枝杆菌及利福平耐药检测 /
- 结核菌培养 /
- 骨结核
Abstract:Objective To compare the diagnostic value of smear acid-fast staining, TB-DNA, X-pert MTB/RIF and culture of Mycobacterium tuberculosis. Methods Four methods were used to detect the perifocal pus of the patients with bone destruction in orthopaedics department within one year, and the results were analyzed statistically, the indexes included sensitivity, specificity, positive predictive value and negative predictive value. Results The sensitivity, specificity, positive predictive value, negative predictive value, and Youden index were 31.75%, 100.00%, 100.00%, 53.74% and 0.32 respectively. TB-DNA had a sensitivity of 88.89%, a specificity of 98.00%, a positive predictive value of 98.25%, a negative predictive value of 87.50%, and a Youden Index of 0.87. Xpert MTB/Rif had a sensitivity of 95.23%, a specificity of 68.00%, and a positive predictive value of 78.95%, the negative predictive value was 91.90%, the Youden index was 0.63. The sensitivity, the specificity, the positive predictive value, the negative predictive value and the Youden index were 41.27%, 100.00%, 100.00%, 57.47% and 0.41 respectively, (χ2 = 77.354, P <0.005) . Conclusion Among the four methods, TB-DNA has a good Sensitivity and specificity, Xpert mtbrif has a good sensitivity, TB-DNA and Xpert mtbrif ha a good authenticity, and both positive and negative predictive values are high, it has good value in the diagnosis of bone tuberculosis. -
Key words:
- Smear acid-fast staining /
- TB-DNA /
- Xpert/MTB/RIF /
- Culture of mycobacterium /
- Tuberculosis bone
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表 1 4种检测方法阳性率比较 [n (%)]
Table 1. Comparison of positive rates of 4 different detection methods [n (%)]
项目 涂片抗酸染色 TB-DNA Xpert MTB/RIF 结核菌培养 χ2 P 阴性 93 (82.30) 56 (49.56) 37 (32.74) 87 (77.00) 77.354 0.001* 阳性 20 (17.70) 57 (50.44) 76 (67.26) 26 (23.01) 合计 113 113 113 113 *P<0.05。 表 2 不同结核检测方法的诊断效能[n (%)]
Table 2. Diagnostic efficacy of different tuberculosis testing methods[n (%)]
检测方法 结果 临床诊断 灵敏度(%) 特异度(%) 阳性
预测值(%)阴性
预测值(%)骨结核(63例) 非骨结核(50例) 涂片抗酸
染色法阳性 20 (31.75) 0 (0.00) 31.75 100.00 100.00 53.76 阴性 43 (68.25) 50 (100.00) TB-DNA 阳性 56 (88.89) 1 (0.20) 88.89 98.00 98.25 87.50 阴性 7 (11.11) 49 (98.00) Xpert MTB/RIF 阳性 60 (95.24) 16 (32.00) 95.23 68.00 78.95 91.90 阴性 3 (4.76) 34 (68.00) 结核菌培养 阳性 26 (41.27) 0 (0.00) 41.27 100.00 100.00 57.47 阴性 37 (58.73) 50 (100.00) -
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