An investigation on the prevalence of chronic obstructive pulmonary disease and its influencing factors among residents in Yongjia County / 预防医学

Objective In order to explore the prevalence of chronic obstructive pulmonary disease (COPD)among residents aged over 40 in Yongjia County,and to provide basic data for the prevention and control strategies and measures of chronic obstructive pulmonary disease.Methods Residents were investigated by questionnaire investigation,body measurements, and pulmonary function tests.Questionnaire survey was including demographic information,chronic obstructive pulmonary disease knowledge awareness,personal and family history of the disease,respiratory symptoms,case management of respiratory diseases,risk factors.Body measurements were including height,body weight,waist circumference,blood pressure and heart rate.Pulmonary function tests was including one second forced expiratory volume (FEV1 ),forced expiratory volume (FEV6 ) and forced vital capacity (FVC ).Results A total of 585 residents were investigated, including 85 patients with chronic obstructive pulmonary disease,and the prevalence rate of 1 4. 53%.Male chronic obstructive pulmonary morbidity was higher than female (χ2 =44. 29,P=0. 001 ),and with age increased,the prevalence rate increased (χ2 =1 9. 56,P<0. 001 ).Single factor analysis showed that the main risk factors were male,age ≥40, often cough /expectoration,smoking,occupational exposure history.Multivariate logistic regression analysis showed that male (OR=1 . 962,95%CI:1 . 025 -3. 757),expectoration (OR=2. 346,95%CI:1 . 1 48 -4. 794)and age (in the age group of 50:OR=2. 561 ,95%CI:1 . 221 -5. 372;age≥60(OR=7. 438,95%CI:3. 601 -1 5. 361 )were the risk factors of chronic obstructive pulmonary disease (COPD).Conclusion Chronic obstructive pneumonia has become a public health problem that affects the health of the residents.We should take effective preventive measures against the risk factors.

CT-Guided Core Needle Biopsy of Pleural Lesions: Evaluating Diagnostic Yield and Associated Complications

OBJECTIVE: The purpose of this study was to retrospectively evaluate the diagnostic accuracy and complications of CT-guided core needle biopsy (CT-guided CNB) of pleural lesion and the possible effects of influencing factors. MATERIALS AND METHODS: From September 2007 to June 2013, 88 consecutive patients (60 men and 28 women; mean [+/- standard deviation] age, 51.1 +/- 14.4 years; range, 19-78 years) underwent CT-guided CNB, which was performed by two experienced chest radiologists in our medical center. Out of 88 cases, 56 (63%) were diagnosed as malignant, 28 (31%) as benign and 4 (5%) as indeterminate for CNB of pleural lesions. The final diagnosis was confirmed by either histopathological diagnosis or clinical follow-up. The diagnostic accuracy, sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and complication rates were statistically evaluated. Influencing factors (patient age, sex, lesion size, pleural-puncture angle, patient position, pleural effusion, and number of pleural punctures) were assessed for their effect on accuracy of CT-guided CNB using univariate and subsequent multivariate analysis. RESULTS: Diagnostic accuracy, sensitivity, specificity, PPV, and NPV were 89.2%, 86.1%, 100%, 100%, and 67.8%, respectively. The influencing factors had no significant effect in altering diagnostic accuracy. As far as complications were concerned, occurrence of pneumothorax was observed in 14 (16%) out of 88 patients. Multivariate analysis revealed lesion size/pleural thickening as a significant risk factor (odds ratio [OR]: 8.744, p = 0.005) for occurrence of pneumothorax. Moreover, presence of pleural effusion was noted as a significant protective factor (OR: 0.171, p = 0.037) for pneumothorax. CONCLUSION: CT-guided CNB of pleural lesion is a safe procedure with high diagnostic yield and low risk of significant complications.

Diffusion-Weighted Imaging for Pretreatment Evaluation and Prediction of Treatment Effect in Patients Undergoing CT-Guided Injection for Lumbar Disc Herniation

OBJECTIVE: To determine whether a change in apparent diffusion coefficient (ADC) value could predict early response to CT-guided Oxygen-Ozone (O2-O3) injection therapy in patients with unilateral mono-radiculopathy due to lumbar disc herniation. MATERIALS AND METHODS: A total of 52 patients with unilateral mono-radiculopathy received a single intradiscal (3 mL) and periganglionic (5 mL) injection of an O2-O3 mixture. An ADC index of the involved side to the intact side was calculated using the following formula: pre-treatment ADC index = ([ADC involved side - ADC intact side] / ADC intact side) x 100. We analyzed the relationship between the pre-treatment Oswestry Disability Index (ODI) and the ADC index. In addition, the correlation between ODI recovery ratio and ADC index was investigated. The sensitivity and specificity of the ADC index for predicting response in O2-O3 therapy was determined. RESULTS: Oswestry Disability Index and the ADC index was not significantly correlated (r = -0.125, p = 0.093). The ADC index and ODI recovery ratio was significantly correlated (r = 0.819, p < 0.001). When using 7.10 as the cut-off value, the ADC index obtained a sensitivity of 86.3% and a specificity of 82.9% for predicting successful response to therapy around the first month of follow-up. CONCLUSION: This preliminary study demonstrates that the patients with decreased ADC index tend to show poor improvement of clinical symptoms. The ADC index may be a useful indicator to predict early response to CT-guided O2-O3 injection therapy in patients with unilateral mono-radiculopathy due to lumbar disc herniation.

Meta-analysis of quantitative diffusion-weighted MR imaging in differentiating benign and malignant pancreatic masses / 华中科技大学学报（医学）（英德文版）

There have been numerous studies done to explore the diagnostic performance of quantitative diffusion-weighted (DW) MR imaging to differentiate between benign and malignant pancreatic masses. However, the results have been inconsistent. We performed a meta-analysis to investigate whether DW-MR imaging can differentiate between these two diseases. Databases including MEDLINE, EMBASE and Cochrane Library were utilized to find relevant articles published between January 2001 and January 2014. A Stata version 12.0 and a Meta-Disc version 1.4 were used to describe primary results. Twelve studies with 594 patients, which fulfilled the inclusion criteria, were enrolled for the analysis. The pooled sensitivity and specificity of DW imaging was 0.91 (95% CI: 0.84, 0.95) and 0.86 (95% CI: 0.76, 0.93) respectively. The area under the curve of the summary receiver operating characteristic was 0.95 (95% CI: 0.93, 0.96). The results indicated that DW imaging might be a valuable tool for differentiating benign and malignant pancreatic masses.

CT-Guided Sclerotherapy for Simple Renal Cysts: Value of Ethanol Concentration Monitoring

OBJECTIVE: The aim of our study was to evaluate the differences between sclerotherapy with and without ethanol concentration monitoring for the treatment of simple renal cysts. MATERIALS AND METHODS: Sixty-seven patients with 70 simple renal cysts were randomly assigned to two groups in a 12-month prospective controlled trial. One group (group A) was treated with computed tomography (CT)-guided sclerotherapy without ethanol concentration monitoring (33 patients with 35 cysts), whereas the other group (group B) had ethanol concentration monitoring (34 patients with 35 cysts) during the procedure. Treatment outcomes between the two groups were compared 12 months later with follow-up ultrasound examination. RESULTS: After the 12-month follow-up period, the overall success rate was 74.3% in group A and 94.3% in group B (p = 0.022). The mean cyst size before and after treatment was 8.6 +/- 2.0 cm and 2.3 +/- 2.9 cm, respectively, in group A, and 8.4 +/- 1.7 cm and 0.8 +/- 1.9 cm, respectively, in group B. The final size of the cysts in group B was significantly smaller than that in group A (p = 0.015). The likelihood of treatment with ethanol concentration monitoring being successful was approximately 16 times higher than without ethanol concentration monitoring (p = 0.026; odds ratio = 15.7; 95% confidence interval: 1.38-179.49). There were no major complications in either group. CONCLUSION: Monitoring of Hounsfield units (HU) of ethanol by CT is an effective method in the treatment of simple renal cysts with ethanol sclerotherapy. The ethanol sclerotherapy procedure can be terminated at the point of clear fluid aspiration because the HU (-190) of CT scan corresponds to it.

Meta-analysis of quantitative diffusion-weighted MR imaging in differentiating benign and malignant pancreatic masses / 华中科技大学学报（医学）（英德文版）

There have been numerous studies done to explore the diagnostic performance of quantitative diffusion-weighted (DW) MR imaging to differentiate between benign and malignant pancreatic masses. However, the results have been inconsistent. We performed a meta-analysis to investigate whether DW-MR imaging can differentiate between these two diseases. Databases including MEDLINE, EMBASE and Cochrane Library were utilized to find relevant articles published between January 2001 and January 2014. A Stata version 12.0 and a Meta-Disc version 1.4 were used to describe primary results. Twelve studies with 594 patients, which fulfilled the inclusion criteria, were enrolled for the analysis. The pooled sensitivity and specificity of DW imaging was 0.91 (95% CI: 0.84, 0.95) and 0.86 (95% CI: 0.76, 0.93) respectively. The area under the curve of the summary receiver operating characteristic was 0.95 (95% CI: 0.93, 0.96). The results indicated that DW imaging might be a valuable tool for differentiating benign and malignant pancreatic masses.

The preoperative size measurement of breast cancer by ultrasonography and mammography / 中华医学超声杂志（电子版）

Objective To comparatively analyze the preoperative value of the size of primary breast cancer presenting as a mass by ultrasonography and by mammography.Methods The tumor size data obtained preoperatively by mammography and by ultrasonography were retrospectively analyzed in all the patients pathologically diagnosed with primary breast cancer in our hospital from July 2006 to July 2009.The Pearson correlation coefficient was calculated for the size of tumors between with pathological method and with each of the imaging modalities.Results A total of 57 patients with breast cancers took both of imaging modalities including 51 cases of infiltrating ductal cancer,4 cases of infiltrating lobular cancer,and 2 of ductal carcinoma in situ.The ranges of the maximum diameter of tumor was 0.6-11.8 cm and mean value was (2.3±2.1) cm by pathological examination,0.6-12.6 cm and mean value was (3.4±2.9)cm by mammography and 0.7-10.2 cm and mean value was (2.4±1.8)cm by ultrasonography,respectively.The Pearson correlation coefficient in the accuracy of imaging assessments was superior to those by ultrasonography (r=0.744,P＜0.05) than those by mammography (r=0.544,P＜0.05).Conclusion Ultrasonography is more accurate than mammography for size assessment of primary breast cancer.