exam1-2 - Subject-specific profiles over time plotted...

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Subject-specific profiles over time plotted separately for each treatment
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Raw data with smoothed time trends for each treatment
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Model M1: A broken stick model with knot at 16 fit with ML 1 With random intercepts and slopes before and after knot Equal intercepts at baseline, slopes vary by trt The Mixed Procedure Model Information Data Set WORK.CD4 Dependent Variable logcd4 Covariance Structure Unstructured Subject Effect id Estimation Method REML Residual Variance Method Profile Fixed Effects SE Method Model-Based Degrees of Freedom Method Containment Dimensions Covariance Parameters 7 Columns in X 9 Columns in Z Per Subject 3 Subjects 1309 Max Obs Per Subject 9 Number of Observations Number of Observations Read 5036 Number of Observations Used 5036 Number of Observations Not Used 0 Iteration History Iteration Evaluations -2 Res Log Like Criterion 0 1 14994.49056919 1 3 11961.45513077 0.00031213 2 1 11961.01431114 0.00000110 3 1 11961.01280356 0.00000000 Convergence criteria met. Covariance Parameter Estimates Cov Parm Subject Estimate UN(1,1) id 0.5858 UN(2,1) id 0.007252 UN(2,2) id 0.000907 UN(3,1) id -0.01235 UN(3,2) id -0.00091
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Model M1: A broken stick model with knot at 16 fit with ML 2 With random intercepts and slopes before and after knot Equal intercepts at baseline, slopes vary by trt The Mixed Procedure Covariance Parameter Estimates Cov Parm Subject Estimate UN(3,3) id 0.001241 Residual 0.3061 Fit Statistics -2 Res Log Likelihood 11961.0 AIC (smaller is better) 11975.0 AICC (smaller is better) 11975.0 BIC (smaller is better) 12011.3 Null Model Likelihood Ratio Test DF Chi-Square Pr > ChiSq 6 3033.48 <.0001 Solution for Fixed Effects Standard Effect Estimate Error DF t Value Pr > |t| Intercept 2.9417 0.02562 1308 114.82 <.0001 week1 -0.01428 0.003420 1534 -4.17 <.0001 week2 -0.00802 0.003398 1534 -2.36 0.0184 week3 -0.00001 0.003354 1534 -0.00 0.9975 week4 0.01951 0.003330 1534 5.86 <.0001 week16plus1 -0.00438 0.005563 1534 -0.79 0.4315
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This note was uploaded on 11/13/2011 for the course STAT 8630 taught by Professor Staff during the Fall '08 term at UGA.

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exam1-2 - Subject-specific profiles over time plotted...

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