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.
源代码在线查看： 例17-04计算结果.lst
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
