The SAS System 1 The LIFETEST Procedure Stratum 1: group = 0 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 1.0000 . . . 1 20 1.0000 0.9048 0.0952 0.0641 2 19 2.0000 . . . 3 18 2.0000 0.8095 0.1905 0.0857 4 17 3.0000 0.7619 0.2381 0.0929 5 16 4.0000 . . . 6 15 4.0000 0.6667 0.3333 0.1029 7 14 5.0000 . . . 8 13 5.0000 0.5714 0.4286 0.1080 9 12 8.0000 . . . 10 11 8.0000 . . . 11 10 8.0000 . . . 12 9 8.0000 0.3810 0.6190 0.1060 13 8 11.0000 . . . 14 7 11.0000 0.2857 0.7143 0.0986 15 6 12.0000 . . . 16 5 12.0000 0.1905 0.8095 0.0857 17 4 15.0000 0.1429 0.8571 0.0764 18 3 17.0000 0.0952 0.9048 0.0641 19 2 22.0000 0.0476 0.9524 0.0465 20 1 23.0000 0 1.0000 . 21 0 Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 12.0000 LOGLOG 8.0000 22.0000 50 8.0000 LOGLOG 4.0000 11.0000 25 4.0000 LOGLOG 1.0000 5.0000 Mean Standard Error 8.6667 1.4114 The SAS System 2 The LIFETEST Procedure Stratum 2: group = 1 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 6.0000 . . . 1 20 6.0000 . . . 2 19 6.0000 0.8571 0.1429 0.0764 3 18 6.0000* . . . 3 17 7.0000 0.8067 0.1933 0.0869 4 16 9.0000* . . . 4 15 10.0000 0.7529 0.2471 0.0963 5 14 10.0000* . . . 5 13 11.0000* . . . 5 12 13.0000 0.6902 0.3098 0.1068 6 11 16.0000 0.6275 0.3725 0.1141 7 10 17.0000* . . . 7 9 19.0000* . . . 7 8 20.0000* . . . 7 7 22.0000 0.5378 0.4622 0.1282 8 6 23.0000 0.4482 0.5518 0.1346 9 5 25.0000* . . . 9 4 32.0000* . . . 9 3 32.0000* . . . 9 2 34.0000* . . . 9 1 35.0000* 0.4482 0.5518 . 9 0 NOTE: The marked survival times are censored observations. Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 . LOGLOG 23.0000 . 50 23.0000 LOGLOG 13.0000 . 25 13.0000 LOGLOG 6.0000 22.0000 Mean Standard Error 17.9092 1.6474 NOTE: The mean survival time and its standard error were underestimated because The SAS System 3 The LIFETEST Procedure Stratum 2: group = 1 the largest observation was censored and the estimation was restricted to the largest event time. Summary of the Number of Censored and Uncensored Values Percent Stratum group Total Failed Censored Censored 1 0 21 21 0 0.00 2 1 21 9 12 57.14 ------------------------------------------------------------------- Total 42 30 12 28.57 The SAS System 4 The LIFETEST Procedure Testing Homogeneity of Survival Curves for time over Strata Rank Statistics group Log-Rank Wilcoxon 0 10.251 271.00 1 -10.251 -271.00 Covariance Matrix for the Log-Rank Statistics group 0 1 0 6.25696 -6.25696 1 -6.25696 6.25696 Covariance Matrix for the Wilcoxon Statistics group 0 1 0 5457.11 -5457.11 1 -5457.11 5457.11 Test of Equality over Strata Pr > Test Chi-Square DF Chi-Square Log-Rank 16.7929 1 <.0001 Wilcoxon 13.4579 1 0.0002 -2Log(LR) 16.4852 1 <.0001 The SAS System 5 The LIFETEST Procedure Stratum 1: group = 0 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 1.0000 . . . 1 20 1.0000 0.9048 0.0952 0.0641 2 19 2.0000 . . . 3 18 2.0000 0.8095 0.1905 0.0857 4 17 3.0000 0.7619 0.2381 0.0929 5 16 4.0000 . . . 6 15 4.0000 0.6667 0.3333 0.1029 7 14 5.0000 . . . 8 13 5.0000 0.5714 0.4286 0.1080 9 12 8.0000 . . . 10 11 8.0000 . . . 11 10 8.0000 . . . 12 9 8.0000 0.3810 0.6190 0.1060 13 8 11.0000 . . . 14 7 11.0000 0.2857 0.7143 0.0986 15 6 12.0000 . . . 16 5 12.0000 0.1905 0.8095 0.0857 17 4 15.0000 0.1429 0.8571 0.0764 18 3 17.0000 0.0952 0.9048 0.0641 19 2 22.0000 0.0476 0.9524 0.0465 20 1 23.0000 0 1.0000 . 21 0 Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 12.0000 LOGLOG 8.0000 22.0000 50 8.0000 LOGLOG 4.0000 11.0000 25 4.0000 LOGLOG 1.0000 5.0000 Mean Standard Error 8.6667 1.4114 The SAS System 6 The LIFETEST Procedure Stratum 2: group = 1 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 6.0000 . . . 1 20 6.0000 . . . 2 19 6.0000 0.8571 0.1429 0.0764 3 18 6.0000* . . . 3 17 7.0000 0.8067 0.1933 0.0869 4 16 9.0000* . . . 4 15 10.0000 0.7529 0.2471 0.0963 5 14 10.0000* . . . 5 13 11.0000* . . . 5 12 13.0000 0.6902 0.3098 0.1068 6 11 16.0000 0.6275 0.3725 0.1141 7 10 17.0000* . . . 7 9 19.0000* . . . 7 8 20.0000* . . . 7 7 22.0000 0.5378 0.4622 0.1282 8 6 23.0000 0.4482 0.5518 0.1346 9 5 25.0000* . . . 9 4 32.0000* . . . 9 3 32.0000* . . . 9 2 34.0000* . . . 9 1 35.0000* 0.4482 . . 9 0 NOTE: The marked survival times are censored observations. Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 . LOGLOG 23.0000 . 50 23.0000 LOGLOG 13.0000 . 25 13.0000 LOGLOG 6.0000 22.0000 Mean Standard Error 17.9092 1.6474 NOTE: The mean survival time and its standard error were underestimated because The SAS System 7 The LIFETEST Procedure Stratum 2: group = 1 the largest observation was censored and the estimation was restricted to the largest event time. Summary of the Number of Censored and Uncensored Values Percent Stratum group Total Failed Censored Censored 1 0 21 21 0 0.00 2 1 21 9 12 57.14 ------------------------------------------------------------------- Total 42 30 12 28.57 The SAS System 8 The LIFETEST Procedure Testing Homogeneity of Survival Curves for time over Strata Rank Statistics group Log-Rank Wilcoxon 0 10.251 271.00 1 -10.251 -271.00 Covariance Matrix for the Log-Rank Statistics group 0 1 0 6.25696 -6.25696 1 -6.25696 6.25696 Covariance Matrix for the Wilcoxon Statistics group 0 1 0 5457.11 -5457.11 1 -5457.11 5457.11 Test of Equality over Strata Pr > Test Chi-Square DF Chi-Square Log-Rank 16.7929 1 <.0001 Wilcoxon 13.4579 1 0.0002 -2Log(LR) 16.4852 1 <.0001 The SAS System 9 The LIFETEST Procedure Stratum 1: group = 0 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 1.0000 . . . 1 20 1.0000 0.9048 0.0952 0.0641 2 19 2.0000 . . . 3 18 2.0000 0.8095 0.1905 0.0857 4 17 3.0000 0.7619 0.2381 0.0929 5 16 4.0000 . . . 6 15 4.0000 0.6667 0.3333 0.1029 7 14 5.0000 . . . 8 13 5.0000 0.5714 0.4286 0.1080 9 12 8.0000 . . . 10 11 8.0000 . . . 11 10 8.0000 . . . 12 9 8.0000 0.3810 0.6190 0.1060 13 8 11.0000 . . . 14 7 11.0000 0.2857 0.7143 0.0986 15 6 12.0000 . . . 16 5 12.0000 0.1905 0.8095 0.0857 17 4 15.0000 0.1429 0.8571 0.0764 18 3 17.0000 0.0952 0.9048 0.0641 19 2 22.0000 0.0476 0.9524 0.0465 20 1 23.0000 0 1.0000 . 21 0 Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 12.0000 LOGLOG 8.0000 22.0000 50 8.0000 LOGLOG 4.0000 11.0000 25 4.0000 LOGLOG 1.0000 5.0000 Mean Standard Error 8.6667 1.4114 The SAS System 10 The LIFETEST Procedure Stratum 2: group = 1 Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 21 6.0000 . . . 1 20 6.0000 . . . 2 19 6.0000 0.8571 0.1429 0.0764 3 18 6.0000* . . . 3 17 7.0000 0.8067 0.1933 0.0869 4 16 9.0000* . . . 4 15 10.0000 0.7529 0.2471 0.0963 5 14 10.0000* . . . 5 13 11.0000* . . . 5 12 13.0000 0.6902 0.3098 0.1068 6 11 16.0000 0.6275 0.3725 0.1141 7 10 17.0000* . . . 7 9 19.0000* . . . 7 8 20.0000* . . . 7 7 22.0000 0.5378 0.4622 0.1282 8 6 23.0000 0.4482 0.5518 0.1346 9 5 25.0000* . . . 9 4 32.0000* . . . 9 3 32.0000* . . . 9 2 34.0000* . . . 9 1 35.0000* 0.4482 0.5518 . 9 0 NOTE: The marked survival times are censored observations. Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 . LOGLOG 23.0000 . 50 23.0000 LOGLOG 13.0000 . 25 13.0000 LOGLOG 6.0000 22.0000 Mean Standard Error 17.9092 1.6474 NOTE: The mean survival time and its standard error were underestimated because The SAS System 11 The LIFETEST Procedure Stratum 2: group = 1 the largest observation was censored and the estimation was restricted to the largest event time. Summary of the Number of Censored and Uncensored Values Percent Stratum group Total Failed Censored Censored 1 0 21 21 0 0.00 2 1 21 9 12 57.14 ------------------------------------------------------------------- Total 42 30 12 28.57 The SAS System 12 The LIFETEST Procedure Testing Homogeneity of Survival Curves for time over Strata Rank Statistics group Log-Rank Wilcoxon 0 10.251 271.00 1 -10.251 -271.00 Covariance Matrix for the Log-Rank Statistics group 0 1 0 6.25696 -6.25696 1 -6.25696 6.25696 Covariance Matrix for the Wilcoxon Statistics group 0 1 0 5457.11 -5457.11 1 -5457.11 5457.11 Test of Equality over Strata Pr > Test Chi-Square DF Chi-Square Log-Rank 16.7929 1 <.0001 Wilcoxon 13.4579 1 0.0002 -2Log(LR) 16.4852 1 <.0001 The SAS System 13 The LIFETEST Procedure Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 42 1.0000 . . . 1 41 1.0000 0.9524 0.0476 0.0329 2 40 2.0000 . . . 3 39 2.0000 0.9048 0.0952 0.0453 4 38 3.0000 0.8810 0.1190 0.0500 5 37 4.0000 . . . 6 36 4.0000 0.8333 0.1667 0.0575 7 35 5.0000 . . . 8 34 5.0000 0.7857 0.2143 0.0633 9 33 6.0000 . . . 10 32 6.0000 . . . 11 31 6.0000 0.7143 0.2857 0.0697 12 30 6.0000* . . . 12 29 7.0000 0.6897 0.3103 0.0715 13 28 8.0000 . . . 14 27 8.0000 . . . 15 26 8.0000 . . . 16 25 8.0000 0.5911 0.4089 0.0764 17 24 9.0000* . . . 17 23 10.0000 0.5654 0.4346 0.0773 18 22 10.0000* . . . 18 21 11.0000 . . . 19 20 11.0000 0.5116 0.4884 0.0788 20 19 11.0000* . . . 20 18 12.0000 . . . 21 17 12.0000 0.4547 0.5453 0.0796 22 16 13.0000 0.4263 0.5737 0.0795 23 15 15.0000 0.3979 0.6021 0.0791 24 14 16.0000 0.3695 0.6305 0.0784 25 13 17.0000 0.3411 0.6589 0.0774 26 12 17.0000* . . . 26 11 19.0000* . . . 26 10 20.0000* . . . 26 9 22.0000 . . . 27 8 22.0000 0.2653 0.7347 0.0765 28 7 23.0000 . . . 29 6 23.0000 0.1895 0.8105 0.0710 30 5 25.0000* . . . 30 4 32.0000* . . . 30 3 32.0000* . . . 30 2 34.0000* . . . 30 1 35.0000* . . . 30 0 NOTE: The marked survival times are censored observations. The SAS System 14 The LIFETEST Procedure Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 23.0000 LOGLOG 15.0000 . 50 12.0000 LOGLOG 8.0000 17.0000 25 6.0000 LOGLOG 3.0000 8.0000 Mean Standard Error 13.0656 1.2713 NOTE: The mean survival time and its standard error were underestimated because the largest observation was censored and the estimation was restricted to the largest event time. Summary of the Number of Censored and Uncensored Values Percent Total Failed Censored Censored 42 30 12 28.57 The SAS System 15 The LIFETEST Procedure Testing Homogeneity of Survival Curves for time over Group Rank Statistics Modified group Log-Rank Wilcoxon Tarone Peto Peto Fleming 0 10.251 271.00 51.16 -6.362 -6.123 -6.877 1 -10.251 -271.00 -51.16 6.362 6.123 6.877 Covariance Matrix for the Log-Rank Statistics group 0 1 0 6.25696 -6.25696 1 -6.25696 6.25696 Covariance Matrix for the Wilcoxon Statistics group 0 1 0 5457.11 -5457.11 1 -5457.11 5457.11 Covariance Matrix for the Tarone Statistics group 0 1 0 173.083 -173.083 1 -173.083 173.083 Covariance Matrix for the Peto Statistics group 0 1 0 2.87399 -2.87399 1 -2.87399 2.87399 Covariance Matrix for the Modified Peto Statistics group 0 1 0 2.69467 -2.69467 1 -2.69467 2.69467 The SAS System 16 The LIFETEST Procedure Covariance Matrix for the Fleming Statistics group 0 1 0 3.27130 -3.27130 1 -3.27130 3.27130 Test of Equality over Group Pr > Test Chi-Square DF Chi-Square Log-Rank 16.7929 1 <.0001 Wilcoxon 13.4579 1 0.0002 Tarone 15.1236 1 0.0001 Peto 14.0841 1 0.0002 Modified Peto 13.9113 1 0.0002 Fleming(1) 14.4572 1 0.0001 The SAS System 17 The LIFETEST Procedure Product-Limit Survival Estimates Survival Standard Number Number time Survival Failure Error Failed Left 0.0000 1.0000 0 0 0 42 1.0000 . . . 1 41 1.0000 0.9524 0.0476 0.0329 2 40 2.0000 . . . 3 39 2.0000 0.9048 0.0952 0.0453 4 38 3.0000 0.8810 0.1190 0.0500 5 37 4.0000 . . . 6 36 4.0000 0.8333 0.1667 0.0575 7 35 5.0000 . . . 8 34 5.0000 0.7857 0.2143 0.0633 9 33 6.0000 . . . 10 32 6.0000 . . . 11 31 6.0000 0.7143 0.2857 0.0697 12 30 6.0000* . . . 12 29 7.0000 0.6897 0.3103 0.0715 13 28 8.0000 . . . 14 27 8.0000 . . . 15 26 8.0000 . . . 16 25 8.0000 0.5911 0.4089 0.0764 17 24 9.0000* . . . 17 23 10.0000 0.5654 0.4346 0.0773 18 22 10.0000* . . . 18 21 11.0000 . . . 19 20 11.0000 0.5116 0.4884 0.0788 20 19 11.0000* . . . 20 18 12.0000 . . . 21 17 12.0000 0.4547 0.5453 0.0796 22 16 13.0000 0.4263 0.5737 0.0795 23 15 15.0000 0.3979 0.6021 0.0791 24 14 16.0000 0.3695 0.6305 0.0784 25 13 17.0000 0.3411 0.6589 0.0774 26 12 17.0000* . . . 26 11 19.0000* . . . 26 10 20.0000* . . . 26 9 22.0000 . . . 27 8 22.0000 0.2653 0.7347 0.0765 28 7 23.0000 . . . 29 6 23.0000 0.1895 0.8105 0.0710 30 5 25.0000* . . . 30 4 32.0000* . . . 30 3 32.0000* . . . 30 2 34.0000* . . . 30 1 35.0000* . . . 30 0 NOTE: The marked survival times are censored observations. The SAS System 18 The LIFETEST Procedure Summary Statistics for Time Variable time Quartile Estimates Point 95% Confidence Interval Percent Estimate Transform [Lower Upper) 75 23.0000 LOGLOG 15.0000 . 50 12.0000 LOGLOG 8.0000 17.0000 25 6.0000 LOGLOG 3.0000 8.0000 Mean Standard Error 13.0656 1.2713 NOTE: The mean survival time and its standard error were underestimated because the largest observation was censored and the estimation was restricted to the largest event time. Summary of the Number of Censored and Uncensored Values Percent Total Failed Censored Censored 42 30 12 28.57 The SAS System 19 The LIFETEST Procedure Testing Homogeneity of Survival Curves for time over Group Rank Statistics group Peto Fleming 0 -6.362 -3.816 1 6.362 3.816 Covariance Matrix for the Peto Statistics group 0 1 0 2.87399 -2.87399 1 -2.87399 2.87399 Covariance Matrix for the Fleming Statistics group 0 1 0 1.05675 -1.05675 1 -1.05675 1.05675 Test of Equality over Group Pr > Test Chi-Square DF Chi-Square Peto 14.0841 1 0.0002 Fleming(0.5,0.5) 13.7800 1 0.0002