AIM:To compare the natural history and course of acute diverticulitis in a younger age group with an older population and to evaluate whether younger patients should be managed differently. METHODS:This study was a re...AIM:To compare the natural history and course of acute diverticulitis in a younger age group with an older population and to evaluate whether younger patients should be managed differently. METHODS:This study was a retrospective review of 157 patients treated with acute diverticulitis between January 1,2004 and December 31,2007.Diverticulitis was stratified according to the Hinchey classification. Patients were divided into 2 populations:group A≤ 50 years(n=31) ;group B>50 years(n=126) .Mean patient follow-up was 15 mo. RESULTS:The median age was 60 years.A significantly higher proportion of patients in group B presented with complicated diverticulitis(36.5%vs 12.9%,P=0.01) .Recurrence was more frequent in group A(25.8%vs 11.1%,P=0.03) and the mean time-torecurrence was shorter(12 mo vs 28 mo,P=0.26) . The most severe recurrent episodes of acute diverticulitis were classified as Hinchey stageⅠand none of the patients required emergency surgery.In multivariate analysis,only age(P=0.024) was identified as an independent prognostic factor for recurrence. CONCLUSION:Based on the results of this study,we recommend that diverticulitis management should be based on the severity of the disease and not on the age of the patient.展开更多
We objectively define the onset date of the South China Sea (SCS) summer monsoon, after having evaluated previous studies and considered various factors. Then, interannual and interdecadal characteristics of the SCS s...We objectively define the onset date of the South China Sea (SCS) summer monsoon, after having evaluated previous studies and considered various factors. Then, interannual and interdecadal characteristics of the SCS summer monsoon onset are analyzed. In addition, we calculate air-sea heat fluxes over the Indian Ocean using the advanced method of CORARE3.0, based on satellite remote sensing data. The onset variation cycle has remarkable interdecadal variability with cycles of 16 a and 28 a. Correlation analysis between air-sea heat fluxes in the Indian Ocean and the SCS summer monsoon indicates that there is a remarkable lag correlation between them. This result has important implications for prediction of the SCS summer monsoon, and provides a scientific basis for further study of the onset process of this monsoon and its prediction. Based on these results, a linear regression equation is obtained to predict the onset date of the monsoon in 2011 and 2012. The forecast is that the onset date of 2011 will be normal or 1 pentad earlier than the normal year, while the onset date in 2012 will be 1-2 pentads later.展开更多
文摘AIM:To compare the natural history and course of acute diverticulitis in a younger age group with an older population and to evaluate whether younger patients should be managed differently. METHODS:This study was a retrospective review of 157 patients treated with acute diverticulitis between January 1,2004 and December 31,2007.Diverticulitis was stratified according to the Hinchey classification. Patients were divided into 2 populations:group A≤ 50 years(n=31) ;group B>50 years(n=126) .Mean patient follow-up was 15 mo. RESULTS:The median age was 60 years.A significantly higher proportion of patients in group B presented with complicated diverticulitis(36.5%vs 12.9%,P=0.01) .Recurrence was more frequent in group A(25.8%vs 11.1%,P=0.03) and the mean time-torecurrence was shorter(12 mo vs 28 mo,P=0.26) . The most severe recurrent episodes of acute diverticulitis were classified as Hinchey stageⅠand none of the patients required emergency surgery.In multivariate analysis,only age(P=0.024) was identified as an independent prognostic factor for recurrence. CONCLUSION:Based on the results of this study,we recommend that diverticulitis management should be based on the severity of the disease and not on the age of the patient.
基金Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-Q11-02)
文摘We objectively define the onset date of the South China Sea (SCS) summer monsoon, after having evaluated previous studies and considered various factors. Then, interannual and interdecadal characteristics of the SCS summer monsoon onset are analyzed. In addition, we calculate air-sea heat fluxes over the Indian Ocean using the advanced method of CORARE3.0, based on satellite remote sensing data. The onset variation cycle has remarkable interdecadal variability with cycles of 16 a and 28 a. Correlation analysis between air-sea heat fluxes in the Indian Ocean and the SCS summer monsoon indicates that there is a remarkable lag correlation between them. This result has important implications for prediction of the SCS summer monsoon, and provides a scientific basis for further study of the onset process of this monsoon and its prediction. Based on these results, a linear regression equation is obtained to predict the onset date of the monsoon in 2011 and 2012. The forecast is that the onset date of 2011 will be normal or 1 pentad earlier than the normal year, while the onset date in 2012 will be 1-2 pentads later.
