schizophrenia data - survival analysis modeling of time to dropout 1 13:36 Thursday, November 17, 2005 The MEANS Procedure Variable N Mean Std Dev Minimum Maximum ------------------------------------------------------------------------------- ID 437 4777.73 2441.09 1103.00 9316.00 _TYPE_ 437 1.0000000 0 1.0000000 1.0000000 _FREQ_ 437 3.6681922 0.6616768 2.0000000 5.0000000 MAXWEEK 437 5.1556064 1.6447154 1.0000000 6.0000000 MDRUG 437 0.7528604 0.4318430 0 1.0000000 ------------------------------------------------------------------------------- schizophrenia data - survival analysis modeling of time to dropout 2 13:36 Thursday, November 17, 2005 The FREQ Procedure Table of MDRUG by MAXWEEK MDRUG MAXWEEK Frequency| Percent | Row Pct | Col Pct | 1| 2| 3| 4| 5| 6| Total ---------+--------+--------+--------+--------+--------+--------+ 0 | 13 | 5 | 16 | 2 | 2 | 70 | 108 | 2.97 | 1.14 | 3.66 | 0.46 | 0.46 | 16.02 | 24.71 | 12.04 | 4.63 | 14.81 | 1.85 | 1.85 | 64.81 | | 35.14 | 50.00 | 38.10 | 40.00 | 25.00 | 20.90 | ---------+--------+--------+--------+--------+--------+--------+ 1 | 24 | 5 | 26 | 3 | 6 | 265 | 329 | 5.49 | 1.14 | 5.95 | 0.69 | 1.37 | 60.64 | 75.29 | 7.29 | 1.52 | 7.90 | 0.91 | 1.82 | 80.55 | | 64.86 | 50.00 | 61.90 | 60.00 | 75.00 | 79.10 | ---------+--------+--------+--------+--------+--------+--------+ Total 37 10 42 5 8 335 437 8.47 2.29 9.61 1.14 1.83 76.66 100.00 Statistics for Table of MDRUG by MAXWEEK Statistic DF Value Prob ------------------------------------------------------ Chi-Square 5 12.8914 0.0244 Likelihood Ratio Chi-Square 5 11.9105 0.0360 Mantel-Haenszel Chi-Square 1 10.3905 0.0013 Phi Coefficient 0.1718 Contingency Coefficient 0.1693 Cramer's V 0.1718 WARNING: 33% of the cells have expected counts less than 5. Chi-Square may not be a valid test. Sample Size = 437 schizophrenia data - survival analysis modeling of time to dropout 3 13:36 Thursday, November 17, 2005 The PHREG Procedure Model Information Data Set WORK.THREE Dependent Variable MAXWEEK Ties Handling EXACT Summary of the Number of Event and Censored Values Percent Total Event Censored Censored 437 437 0 0.00 Convergence Status Convergence criterion (GCONV=1E-8) satisfied. Model Fit Statistics Without With Criterion Covariates Covariates -2 LOG L 719.462 708.878 AIC 719.462 710.878 SBC 719.462 714.958 Testing Global Null Hypothesis: BETA=0 Test Chi-Square DF Pr > ChiSq Likelihood Ratio 10.5842 1 0.0011 Score 11.8630 1 0.0006 Wald 11.4027 1 0.0007 Analysis of Maximum Likelihood Estimates Parameter Standard Hazard Variable DF Estimate Error Chi-Square Pr > ChiSq Ratio MDRUG 1 -0.69238 0.20504 11.4027 0.0007 0.500 schizophrenia data - survival analysis modeling of time to dropout 4 13:36 Thursday, November 17, 2005 Obs ID _TYPE_ _FREQ_ MAXWEEK MDRUG 1 1103 1 4 6 1 2 1105 1 3 3 1 3 1118 1 2 1 1 schizophrenia data - survival analysis modeling of time to dropout 5 13:36 Thursday, November 17, 2005 The LOGISTIC Procedure Model Information Data Set WORK.DROPS Response Variable drop Number of Response Levels 2 Number of Observations 1918 Model binary cloglog Optimization Technique Fisher's scoring Response Profile Ordered Total Value drop Frequency 1 1 102 2 0 1816 Probability modeled is drop=1. NOTE: 267 observations were deleted due to missing values for the response or explanatory variables. Model Convergence Status Convergence criterion (GCONV=1E-8) satisfied. Model Fit Statistics Intercept Intercept and Criterion Only Covariates AIC 799.026 743.191 SC 804.585 776.545 -2 Log L 797.026 731.191 Testing Global Null Hypothesis: BETA=0 Test Chi-Square DF Pr > ChiSq Likelihood Ratio 65.8356 5 <.0001 Score 66.0012 5 <.0001 Wald 55.6335 5 <.0001 schizophrenia data - survival analysis modeling of time to dropout 6 13:36 Thursday, November 17, 2005 The LOGISTIC Procedure Analysis of Maximum Likelihood Estimates Standard Wald Parameter DF Estimate Error Chi-Square Pr > ChiSq Intercept 1 -3.2434 0.3784 73.4737 <.0001 t1 1 1.2946 0.3902 11.0055 0.0009 t2 1 0.0500 0.4744 0.0111 0.9160 t3 1 1.5644 0.3860 16.4291 <.0001 t4 1 -0.4905 0.5701 0.7401 0.3896 mdrug 1 -0.6934 0.2050 11.4353 0.0007 Association of Predicted Probabilities and Observed Responses Percent Concordant 66.6 Somers' D 0.447 Percent Discordant 21.8 Gamma 0.506 Percent Tied 11.6 Tau-a 0.045 Pairs 185232 c 0.724 schizophrenia data - survival analysis modeling of time to dropout 7 13:36 Thursday, November 17, 2005 Obs id drop t1 t2 t3 t4 mdrug 1 1103 0 1 0 0 0 1 2 1103 0 0 1 0 0 1 3 1103 0 0 0 1 0 1 4 1103 0 0 0 0 1 1 5 1103 0 0 0 0 0 1 6 1105 0 1 0 0 0 1 7 1105 0 0 1 0 0 1 8 1105 1 0 0 1 0 1 9 1105 . 0 0 0 1 1 10 1105 . 0 0 0 0 1 11 1118 1 1 0 0 0 1 12 1118 . 0 1 0 0 1 13 1118 . 0 0 1 0 1 14 1118 . 0 0 0 1 1 15 1118 . 0 0 0 0 1