目的利用ROC曲线分析的方法,探讨泪膜破裂时间(tear film break up time,BUT)和泪液分泌试验(schirmer test,ST)在诊断干眼症时的最佳临床临界值。方法 122位受访者进行了Saliabury干眼症问卷调查后行BUT检查及ST检查。根据主观干眼症...目的利用ROC曲线分析的方法,探讨泪膜破裂时间(tear film break up time,BUT)和泪液分泌试验(schirmer test,ST)在诊断干眼症时的最佳临床临界值。方法 122位受访者进行了Saliabury干眼症问卷调查后行BUT检查及ST检查。根据主观干眼症状问卷结果进行干眼症诊断,对BUT及ST客观检验结果分别予ROC曲线统计分析评判。结果从BUT的ROC曲线中我们发现当临界值为5s时,其干眼症诊断的灵敏性为70%以上,特异性60%左右;而当BUT临界值为10秒时,其灵敏性可以达95%,但其特异性仅为25%左右。同样,从ST的ROC曲线中我们发现当临界值为10mm时,其灵敏性为55%以上,特异度63%左右;而当临界值为5mm时,其特异性可以高达95%以上,但其灵敏性仅为20%左右。BUT的ROC曲线下面积大于ST的ROC曲线下面积。结论从ROC曲线分析结果我们认为BUT取5.0s,ST取10mm时其诊断干眼的的灵敏性和特异性组合相对较佳;在诊断干眼时BUT的诊断效能比ST更高。展开更多
Objective To develop a tool capable of early and exactly predicting various outcomes in comatose survivors who restore spontaneous circulation after cardiopulmonary resuscitation （CPR） and validate its performance. ...Objective To develop a tool capable of early and exactly predicting various outcomes in comatose survivors who restore spontaneous circulation after cardiopulmonary resuscitation （CPR） and validate its performance. Methods Variables that were both readily available and predictive of outcomes were identified by systematically reviewing published literature on resuscitation. A value was assigned to these variables. We used these variables in combination with APACHE II score to devise a multifactorial prediction score system, which we called PRCSs Prognostication Score （PRCSs-PS）. Outcomes in 115 hospitalized comatose survivors after CPR were retrospectively reviewed using PRCSs-PS. Score of patients with different outcomes was compared. The area under the receiver- operating characteristic （ROC） curve was determined to evaluate performance of this tool to identify patients with a poor outcome （CPC4 and 5） and other outcomes （CPC1, 2, and 3）. Results There were differences of PRCSs-PS score among multiple groups with five different outcomes （CPC 1-5）（F=65.91, P=0.000）. Pairwise groups with different CPC were compared： no significant difference was noted between CPC1 and CPC2 （12.41±6.49 vs 17.38±6.91,P=0.092）, but difference between other pairwise CPC groups was statistically significant （CPC2 vs CPC3：17.38±6.91 vs 24.50±5.80, P=0.041, CPC3 vs CPC4：24.50±5.80 vs 32.29±5.24, P=0.006）. The performance of PRCSs-PS to discriminate patients with a poor outcome from patients with other outcomes went as follows： it had 100% sensitivity, 78.6% specificity, and 178.6 diagnostic index at the score cut-off22.5; it had 77.8% sensitivity, 100% specificity and 176.4 diagnostic index at the score cut-off32.5. Score 23 and 33 were two key cut-offpoints. The area under the ROC curve was 0.968, showing excellent discrimination. Conclusions The final outcomes in post-resuscitation comatose survivors can be accurately predicted using PRCSs-PS Score.展开更多
Background:Long non-coding RNAs(lncRNAs)have been applied as biomarkers in many diseases.However,scarce biomarkers are available in single lncRNA differential expression associated with different clinical stages of li...Background:Long non-coding RNAs(lncRNAs)have been applied as biomarkers in many diseases.However,scarce biomarkers are available in single lncRNA differential expression associated with different clinical stages of liver cirrhosis(LC).The aim of the study is to identify some lncRNAs that can serve as non-invasive sensitive biomarkers for early diagnosis and grade of LC.Methods:Blood lncRNA expression was evaluated in three independent cohorts with 305 participants including healthy controls,hepatitis B virus(HBV)carriers,and patients with chronic hepatitis B(CHB)or LC.First,candidate lncRNAs were screened by CapitalBiotech microarray to diagnose cirrhosis.Quantitative reverse-transcriptase polymerase chain reaction was then used to investigate the expression of selected lncRNAs in the whole group of cirrhosis and different Child–Pugh classes.Ultimately,the diagnostic accuracy of the promising biomarker was examined and validated via Mann–Whitney test and receiver-operating characteristics analysis.Results:Lnc-TCL6 was identified as a sensitive biomarker for early diagnosis of LC(Child–Pugh A)compared with healthy controls(area under the ROC curve[AUC]=0.636),HBV carriers(AUC=0.671),and CHB patients(AUC=0.672).Furthermore,lnc-TCL6 showed a favourable capacity in discriminating among different Child–Pugh classes(AUC:0.711–0.837).Compared with healthy controls,HBV carriers,and CHB patients,the expression of lnc-TCL6 was obviously up-regulated in Child–Pugh A patients and,conversely,significantly down-regulated in Child–Pugh C patients.Conclusions:Lnc-TCL6 is a novel potential biomarker for early diagnosis of LC and is a possible predictor of disease progression.展开更多
文摘目的利用ROC曲线分析的方法,探讨泪膜破裂时间(tear film break up time,BUT)和泪液分泌试验(schirmer test,ST)在诊断干眼症时的最佳临床临界值。方法 122位受访者进行了Saliabury干眼症问卷调查后行BUT检查及ST检查。根据主观干眼症状问卷结果进行干眼症诊断,对BUT及ST客观检验结果分别予ROC曲线统计分析评判。结果从BUT的ROC曲线中我们发现当临界值为5s时,其干眼症诊断的灵敏性为70%以上,特异性60%左右;而当BUT临界值为10秒时,其灵敏性可以达95%,但其特异性仅为25%左右。同样,从ST的ROC曲线中我们发现当临界值为10mm时,其灵敏性为55%以上,特异度63%左右;而当临界值为5mm时,其特异性可以高达95%以上,但其灵敏性仅为20%左右。BUT的ROC曲线下面积大于ST的ROC曲线下面积。结论从ROC曲线分析结果我们认为BUT取5.0s,ST取10mm时其诊断干眼的的灵敏性和特异性组合相对较佳;在诊断干眼时BUT的诊断效能比ST更高。
文摘Objective To develop a tool capable of early and exactly predicting various outcomes in comatose survivors who restore spontaneous circulation after cardiopulmonary resuscitation （CPR） and validate its performance. Methods Variables that were both readily available and predictive of outcomes were identified by systematically reviewing published literature on resuscitation. A value was assigned to these variables. We used these variables in combination with APACHE II score to devise a multifactorial prediction score system, which we called PRCSs Prognostication Score （PRCSs-PS）. Outcomes in 115 hospitalized comatose survivors after CPR were retrospectively reviewed using PRCSs-PS. Score of patients with different outcomes was compared. The area under the receiver- operating characteristic （ROC） curve was determined to evaluate performance of this tool to identify patients with a poor outcome （CPC4 and 5） and other outcomes （CPC1, 2, and 3）. Results There were differences of PRCSs-PS score among multiple groups with five different outcomes （CPC 1-5）（F=65.91, P=0.000）. Pairwise groups with different CPC were compared： no significant difference was noted between CPC1 and CPC2 （12.41±6.49 vs 17.38±6.91,P=0.092）, but difference between other pairwise CPC groups was statistically significant （CPC2 vs CPC3：17.38±6.91 vs 24.50±5.80, P=0.041, CPC3 vs CPC4：24.50±5.80 vs 32.29±5.24, P=0.006）. The performance of PRCSs-PS to discriminate patients with a poor outcome from patients with other outcomes went as follows： it had 100% sensitivity, 78.6% specificity, and 178.6 diagnostic index at the score cut-off22.5; it had 77.8% sensitivity, 100% specificity and 176.4 diagnostic index at the score cut-off32.5. Score 23 and 33 were two key cut-offpoints. The area under the ROC curve was 0.968, showing excellent discrimination. Conclusions The final outcomes in post-resuscitation comatose survivors can be accurately predicted using PRCSs-PS Score.
基金supported in part by grants from the National Natural Science Foundation of China[U1501224]the Natural Science Foundation Team Project of Guangdong Province[2018B03031200]+1 种基金the Science and Technology Developmental Foundation of Guangdong Province[2017B020226003]the Science and Technology Program of Guangzhou City[201604020118].
文摘Background:Long non-coding RNAs(lncRNAs)have been applied as biomarkers in many diseases.However,scarce biomarkers are available in single lncRNA differential expression associated with different clinical stages of liver cirrhosis(LC).The aim of the study is to identify some lncRNAs that can serve as non-invasive sensitive biomarkers for early diagnosis and grade of LC.Methods:Blood lncRNA expression was evaluated in three independent cohorts with 305 participants including healthy controls,hepatitis B virus(HBV)carriers,and patients with chronic hepatitis B(CHB)or LC.First,candidate lncRNAs were screened by CapitalBiotech microarray to diagnose cirrhosis.Quantitative reverse-transcriptase polymerase chain reaction was then used to investigate the expression of selected lncRNAs in the whole group of cirrhosis and different Child–Pugh classes.Ultimately,the diagnostic accuracy of the promising biomarker was examined and validated via Mann–Whitney test and receiver-operating characteristics analysis.Results:Lnc-TCL6 was identified as a sensitive biomarker for early diagnosis of LC(Child–Pugh A)compared with healthy controls(area under the ROC curve[AUC]=0.636),HBV carriers(AUC=0.671),and CHB patients(AUC=0.672).Furthermore,lnc-TCL6 showed a favourable capacity in discriminating among different Child–Pugh classes(AUC:0.711–0.837).Compared with healthy controls,HBV carriers,and CHB patients,the expression of lnc-TCL6 was obviously up-regulated in Child–Pugh A patients and,conversely,significantly down-regulated in Child–Pugh C patients.Conclusions:Lnc-TCL6 is a novel potential biomarker for early diagnosis of LC and is a possible predictor of disease progression.
