例17-04计算结果.lst

SAS应用_医学统计学的例题程序及其结果,学习SAS的必备资料.

                                       The SAS System         09:34 Monday, April 1, 2002  45

                                   The LIFETEST Procedure

                                Life Table Survival Estimates
                                            G = 1

                                                                     Conditional
                                           Effective   Conditional   Probability
      Interval        Number     Number      Sample    Probability     Standard
   [Lower,  Upper)    Failed    Censored      Size      of Failure      Error      Survival

        0       10      10          0         23.0         0.4348        0.1034      1.0000
       10       20       3          2         12.0         0.2500        0.1250      0.5652
       20       30       0          3          6.5              0             0      0.4239
       30       40       1          2          4.0         0.2500        0.2165      0.4239
       40       50       1          0          2.0         0.5000        0.3536      0.3179
       50       60       1          0          1.0         1.0000             0      0.1590


                                Survival    Median     Median
      Interval                  Standard   Residual   Standard
   [Lower,  Upper)    Failure     Error    Lifetime     Error

        0       10          0          0    14.6154     7.3782
       10       20     0.4348     0.1034    32.2222     5.1320
       20       30     0.5761     0.1049    26.6667     5.2298
       30       40     0.5761     0.1049    16.6667     6.6667
       40       50     0.6821     0.1209    10.0000     7.0711
       50       60     0.8410     0.1276          .          .


                     Evaluated at the Midpoint of the Interval

                                   PDF                 Hazard
      Interval                  Standard              Standard
   [Lower,  Upper)      PDF       Error     Hazard      Error

        0       10     0.0435     0.0103   0.055556   0.016877
       10       20     0.0141    0.00752   0.028571   0.016327
       20       30          0          .          0          .
       30       40     0.0106    0.00955   0.028571   0.028278
       40       50     0.0159     0.0128   0.066667   0.062854
       50       60     0.0159     0.0128        0.2          0

                                       The SAS System         09:34 Monday, April 1, 2002  46

                                   The LIFETEST Procedure

                                Life Table Survival Estimates
                                            G = 2

                                                                     Conditional
                                           Effective   Conditional   Probability
      Interval        Number     Number      Sample    Probability     Standard
   [Lower,  Upper)    Failed    Censored      Size      of Failure      Error      Survival

        0       10      13          0         20.0         0.6500        0.1067      1.0000
       10       20       7          0          7.0         1.0000             0      0.3500


                                Survival    Median     Median
      Interval                  Standard   Residual   Standard
   [Lower,  Upper)    Failure     Error    Lifetime     Error

        0       10          0          0     7.6923     1.7201
       10       20     0.6500     0.1067          .          .


                     Evaluated at the Midpoint of the Interval

                                   PDF                 Hazard
      Interval                  Standard              Standard
   [Lower,  Upper)      PDF       Error     Hazard      Error

        0       10     0.0650     0.0107   0.096296   0.023408
       10       20     0.0350     0.0107        0.2          0



                   Summary of the Number of Censored and Uncensored Values

                    G           Total     Failed   Censored  %Censored

                    1              23         16          7    30.4348
                    2              20         20          0     0.0000

                    Total          43         36          7    16.2791
                                       The SAS System         09:34 Monday, April 1, 2002  47

                                   The LIFETEST Procedure

                     Testing Homogeneity of Survival Curves over Strata
                                       Time Variable T


                                       Rank Statistics

                             G            Log-Rank     Wilcoxon

                             1             -7.8083      -181.00
                             2              7.8083       181.00


                        Covariance Matrix for the Log-Rank Statistics

                            G                    1             2

                            1              6.96486      -6.96486
                            2             -6.96486       6.96486


                        Covariance Matrix for the Wilcoxon Statistics

                            G                    1             2

                            1              6429.33      -6429.33
                            2             -6429.33       6429.33


                                Test of Equality over Strata

                                                          Pr >
                           Test      Chi-Square    DF  Chi-Square

                           Log-Rank      8.7539     1      0.0031
                           Wilcoxon      5.0956     1      0.0240
                           -2Log(LR)    11.5160     1      0.0007