ITP survival analysis: aspirin
This compound had a significant effect on survival: males p = 0.0106
Results are based on the use of pooled factor(s) that is/are stratified within the survival analysis model.
All test sites combined – female
Survival analysis details -- Female
Asp effect on survival,
females, test site = All
Log-rank test
chisq = 1.5053
p = 0.2199
Wang-Allison test
odds ratio = 0.9604
p = 1.0
Quantiles
Asp
Control
% difference
25% died before day:
760
739
+3 %
Median lifespan (days)
850
888
-4 %
75% died before day:
952
988
-4 %
90% died before day:
1074
1072
0 %
Max lifespan observed (days)
1178
1212
Number of mice at start
140
271
Animal censor events are denoted by + marks in the plot
All test sites combined – male
Survival analysis details -- Male
Asp effect on survival,
males, test site = All
Log-rank test
chisq = 6.536
p = 0.0106
Wang-Allison test
odds ratio = 1.4962
p = 0.1703
Quantiles
Asp
Control
% difference
25% died before day:
676
612
+10 %
Median lifespan (days)
846
784
+8 %
75% died before day:
950
912
+4 %
90% died before day:
1091
1048
+4 %
Max lifespan observed (days)
1256
1305
Number of mice at start
168
350
Animal censor events are denoted by + marks in the plot
By individual test site:
TJL – female
TJL – female
Survival analysis details
Asp effect on survival,
females, test site = TJL
Log-rank test
chisq = 0.091
p = 0.7629
Wang-Allison test
odds ratio = 1.4955
p = 0.5559
Quantiles
Asp
Control
% difference
25% died before day:
770
738
+4 %
Median lifespan (days)
843
858
-2 %
75% died before day:
940
969
-3 %
90% died before day:
1093
1050
+4 %
Max lifespan observed (days)
1163
1212
Number of mice at start
48
93
Animal censor events are denoted by + marks in the plot
TJL – male
TJL – male
Survival analysis details
Asp effect on survival,
males, test site = TJL
Log-rank test
chisq = 3.806
p = 0.0511
Wang-Allison test
odds ratio = 1.6868
p = 0.3028
Quantiles
Asp
Control
% difference
25% died before day:
671
553
+21 %
Median lifespan (days)
840
757
+11 %
75% died before day:
922
875
+5 %
90% died before day:
1090
967
+13 %
Max lifespan observed (days)
1201
1216
Number of mice at start
57
125
Animal censor events are denoted by + marks in the plot
UM – female
UM – female
Survival analysis details
Asp effect on survival,
females, test site = UM
Log-rank test
chisq = 2.7722
p = 0.0959
Wang-Allison test
odds ratio = 0.5293
p = 0.5403
Quantiles
Asp
Control
% difference
25% died before day:
744
772
-4 %
Median lifespan (days)
836
916
-9 %
75% died before day:
936
1005
-7 %
90% died before day:
1023
1111
-8 %
Max lifespan observed (days)
1175
1210
Number of mice at start
44
82
Animal censor events are denoted by + marks in the plot
UM – male
UM – male
Survival analysis details
Asp effect on survival,
males, test site = UM
Log-rank test
chisq = 0.1284
p = 0.7201
Wang-Allison test
odds ratio = 1.016
p = 1.0
Quantiles
Asp
Control
% difference
25% died before day:
777
727
+7 %
Median lifespan (days)
889
864
+3 %
75% died before day:
998
995
0 %
90% died before day:
1118
1121
0 %
Max lifespan observed (days)
1256
1305
Number of mice at start
57
106
Animal censor events are denoted by + marks in the plot
UT – female
UT – female
Survival analysis details
Asp effect on survival,
females, test site = UT
Log-rank test
chisq = 0.0651
p = 0.7985
Wang-Allison test
odds ratio = 1.0
p = 1.0
Quantiles
Asp
Control
% difference
25% died before day:
780
744
+5 %
Median lifespan (days)
874
880
-1 %
75% died before day:
971
994
-2 %
90% died before day:
1078
1076
0 %
Max lifespan observed (days)
1178
1188
Number of mice at start
48
96
Animal censor events are denoted by + marks in the plot
UT – male
UT – male
Survival analysis details
Asp effect on survival,
males, test site = UT
Log-rank test
chisq = 4.3008
p = 0.0381
Wang-Allison test
odds ratio = 1.8881
p = 0.2811
Quantiles
Asp
Control
% difference
25% died before day:
649
592
+10 %
Median lifespan (days)
770
739
+4 %
75% died before day:
950
877
+8 %
90% died before day:
1068
988
+8 %
Max lifespan observed (days)
1200
1132
Number of mice at start
54
119
Animal censor events are denoted by + marks in the plot
See our
ITP data portal page for more information on
National Institute on Aging's Interventions Testing Program (ITP) including bibliography, data set downloads, and links to all available hosted data.
Statistical definitions