【正文】 The LOGISTIC Procedure Model Information Data Set Response Variable group Number of Response Levels 2 Model binary logit Optimization Technique Fisher39。s scoring Number of Observations Read 9 Number of Observations Used 9 Response Profile Ordered Total Value group Frequency 1 Case 5 2 Control 4 Probability modeled is group=39。Case39。. Model Convergence Status Convergence criterion (GCONV=1E8) satisfied. Model Fit Statistics Intercept Intercept and Criterion Only Covariates AIC SC 2 Log L Testing Global Null Hypothesis: BETA=0 Test ChiSquare DF Pr ChiSq Likelihood Ratio 1 Score 1 Wald 1 The LOGISTIC Procedure Analysis of Maximum Likelihood Estimates Standard Wald Parameter DF Estimate Error ChiSquare Pr ChiSq Intercept 1 test_val 1 Odds Ratio Estimates Point 95% Wald Effect Estimate Confidence Limits test_val Association of Predicted Probabilities and Observed Responses Percent Concordant Somers39。 D Percent Discordant Gamma Percent Tied Taua Pairs 20 c ROC Curve sample13_3 16:47 Tuesday, November 13, 2022 17 Obs _PROB_ _POS_ _NEG_ _FALPOS_ _FALNEG_ _SENSIT_ _1MSPEC_ 1 1 4 0 4 2 2 4 0 3 3 3 4 0 2 4 4 4 0 1 5 4 3 1 1 6 4 2 2 1 7 5 2 2 0 8 5 1 3 0 9 5 0 4 0 重 點(diǎn) 1. 臨床試驗(yàn)的類(lèi)型和主要特點(diǎn)是什么？ 2. 臨床試驗(yàn)中避免偏倚的技巧主要是什么？ 3. 診斷試驗(yàn)中常用的指標(biāo)有哪些？ 4. 診斷試驗(yàn)中常用的綜合性評(píng)價(jià)指標(biāo)有哪些？ 5. 什么是陰性預(yù)測(cè)值和陽(yáng)性預(yù)測(cè)值？ 6. 什么是 ROC曲線(xiàn)，有什么用途？ 7. 診斷試驗(yàn)的正確應(yīng)用需要注意哪些事項(xiàng)？