UCLA Academic Technology Services HomeServicesClassesContactJobs
Search

Stata Textbook Examples
Applied Longitudinal Data Analysis: Modeling Change and Event Occurrence
by Judith D. Singer and John B. Willett
Chapter 13:  Describing Continuous-time Event Occurrence Data

Table 13.1, page 471.
use http://www.ats.ucla.edu/stat/stata/examples/alda/data/honking, clear 

sort seconds 
list seconds censor
 
       seconds     censor
  1.      1.41          1
  2.      1.41          0
  3.      1.51          0
  4.      1.67          0
  5.      1.68          0
  6.      1.86          0
  7.      2.12          0     
.. output omitted ...
 50.      6.21          1
 51.       6.3          0
 52.       6.6          1
 53.       7.2          0
 54.      9.59          0
 55.     12.29          0
 56.     13.18          0
 57.     17.15          1
Table 13.2, page 477.
use http://www.ats.ucla.edu/stat/stata/examples/alda/data/honking, clear 

generate event = ~censor 
ltable seconds event, noadjust intervals(0 1 2 3 4 5 6 7 8 18)
 
                 Beg.                                 Std.
   Interval     Total   Deaths   Lost    Survival    Error     [95% Conf. Int.]
-------------------------------------------------------------------------------
    1     2        57        5      1     0.9123    0.0375     0.8020    0.9625
    2     3        51       14      3     0.6619    0.0632     0.5224    0.7693
    3     4        34        9      2     0.4867    0.0683     0.3481    0.6117
    4     5        23        6      4     0.3597    0.0673     0.2314    0.4896
    5     6        13        2      2     0.3044    0.0674     0.1803    0.4378
    6     7         9        2      2     0.2367    0.0673     0.1199    0.3757
    7     8         5        1      0     0.1894    0.0685     0.0783    0.3373
    8    18         4        3      1     0.0473    0.0444     0.0038    0.1884
-------------------------------------------------------------------------------
 
ltable seconds event, noadjust hazard intervals(0 1 2 3 4 5 6 7 8 18)
 
                 Beg.     Cum.     Std.                Std.
   Interval     Total   Failure   Error    Hazard     Error    [95% Conf. Int.]
-------------------------------------------------------------------------------
    1     2        57    0.0877  0.0375    0.0877    0.0392    0.0285    0.1797
    2     3        51    0.3381  0.0632    0.2745    0.0734    0.1501    0.4359
    3     4        34    0.5133  0.0683    0.2647    0.0882    0.1210    0.4636
    4     5        23    0.6403  0.0673    0.2609    0.1065    0.0957    0.5073
    5     6        13    0.6956  0.0674    0.1538    0.1088    0.0186    0.4286
    6     7         9    0.7633  0.0673    0.2222    0.1571    0.0269    0.6191
    7     8         5    0.8106  0.0685    0.2000    0.2000    0.0051    0.7378
    8    18         4    0.9527  0.0444    0.0750    0.0433    0.0155    0.1806
-------------------------------------------------------------------------------
 
ltable seconds event, intervals(0 1 2 3 4 5 6 7 8 18)
 
                 Beg.                                 Std.
   Interval     Total   Deaths   Lost    Survival    Error     [95% Conf. Int.]
-------------------------------------------------------------------------------
    1     2        57        5      1     0.9115    0.0378     0.8004    0.9622
    2     3        51       14      3     0.6537    0.0643     0.5121    0.7633
    3     4        34        9      2     0.4754    0.0690     0.3362    0.6021
    4     5        23        6      4     0.3396    0.0680     0.2116    0.4719
    5     6        13        2      2     0.2830    0.0674     0.1608    0.4181
    6     7         9        2      2     0.2122    0.0666     0.0998    0.3526
    7     8         5        1      0     0.1698    0.0654     0.0662    0.3140
    8    18         4        3      1     0.0243    0.0331     0.0005    0.1634
-------------------------------------------------------------------------------
 
ltable seconds event, hazard intervals(0 1 2 3 4 5 6 7 8 18)
 
                 Beg.     Cum.     Std.                Std.
   Interval     Total   Failure   Error    Hazard     Error    [95% Conf. Int.]
-------------------------------------------------------------------------------
    1     2        57    0.0885  0.0378    0.0926    0.0414    0.0115    0.1737
    2     3        51    0.3463  0.0643    0.3294    0.0868    0.1592    0.4996
    3     4        34    0.5246  0.0690    0.3158    0.1039    0.1121    0.5195
    4     5        23    0.6604  0.0680    0.3333    0.1342    0.0703    0.5963
    5     6        13    0.7170  0.0674    0.1818    0.1280    0.0000    0.4328
    6     7         9    0.7878  0.0666    0.2857    0.2000    0.0000    0.6776
    7     8         5    0.8302  0.0654    0.2222    0.2208    0.0000    0.6551
    8    18         4    0.9757  0.0331    0.1500    0.0573    0.0377    0.2623
-------------------------------------------------------------------------------
Table 13.3, page 484.
use http://www.ats.ucla.edu/stat/stata/examples/alda/data/honking, clear 

generate event = ~censor 
stset seconds, failure(event)
 
sts list
 
         failure _d:  event
   analysis time _t:  seconds
 
           Beg.          Net            Survivor      Std.
  Time    Total   Fail   Lost           Function     Error     [95% Conf. Int.]
-------------------------------------------------------------------------------
  1.41       57      1      1             0.9825    0.0174     0.8819    0.9975
  1.51       55      1      0             0.9646    0.0246     0.8657    0.9910
  1.67       54      1      0             0.9467    0.0299     0.8439    0.9825
  1.68       53      1      0             0.9289    0.0343     0.8215    0.9727
  1.86       52      1      0             0.9110    0.0380     0.7993    0.9620
  2.12       51      1      0             0.8931    0.0412     0.7775    0.9505
  2.19       50      1      0             0.8753    0.0441     0.7561    0.9385
  2.36       49      0      1             0.8753    0.0441     0.7561    0.9385
  2.48       48      1      0             0.8570    0.0468     0.7344    0.9258
   2.5       47      1      0             0.8388    0.0492     0.7130    0.9127
  2.53       46      1      0             0.8206    0.0514     0.6921    0.8992
  2.54       45      1      0             0.8023    0.0534     0.6715    0.8854
  2.56       44      1      0             0.7841    0.0552     0.6511    0.8712
  2.62       43      1      0             0.7659    0.0569     0.6311    0.8568
  2.68       42      1      0             0.7476    0.0584     0.6113    0.8421
  2.76       41      0      1             0.7476    0.0584     0.6113    0.8421
  2.78       40      0      1             0.7476    0.0584     0.6113    0.8421
  2.83       39      1      0             0.7285    0.0599     0.5903    0.8266
  2.88       38      1      0             0.7093    0.0614     0.5697    0.8108
  2.89       37      1      0             0.6901    0.0626     0.5493    0.7948
  2.92       36      1      0             0.6710    0.0637     0.5292    0.7786
  2.98       35      1      0             0.6518    0.0647     0.5094    0.7621
  3.05       34      0      1             0.6518    0.0647     0.5094    0.7621
  3.14       33      1      0             0.6320    0.0657     0.4890    0.7451
  3.17       32      1      0             0.6123    0.0666     0.4689    0.7278
  3.21       31      1      0             0.5925    0.0673     0.4490    0.7103
  3.22       30      1      0             0.5728    0.0679     0.4294    0.6926
  3.24       29      1      0             0.5530    0.0684     0.4100    0.6747
  3.46       28      0      1             0.5530    0.0684     0.4100    0.6747
  3.56       27      1      0             0.5325    0.0688     0.3899    0.6561
  3.57       26      1      0             0.5121    0.0692     0.3701    0.6372
  3.58       25      1      0             0.4916    0.0694     0.3506    0.6181
  3.78       24      1      0             0.4711    0.0694     0.3313    0.5988
  4.01       23      0      1             0.4711    0.0694     0.3313    0.5988
   4.1       22      1      0             0.4497    0.0695     0.3111    0.5786
  4.18       21      1      0             0.4283    0.0694     0.2913    0.5582
   4.3       20      0      1             0.4283    0.0694     0.2913    0.5582
  4.44       19      1      0             0.4057    0.0693     0.2705    0.5367
  4.51       18      1      0             0.3832    0.0690     0.2501    0.5149
  4.52       17      1      0             0.3606    0.0686     0.2300    0.4928
  4.63       16      0      1             0.3606    0.0686     0.2300    0.4928
  4.71       15      0      1             0.3606    0.0686     0.2300    0.4928
  4.96       14      1      0             0.3349    0.0683     0.2067    0.4681
  5.12       13      0      1             0.3349    0.0683     0.2067    0.4681
  5.39       12      1      0             0.3070    0.0681     0.1815    0.4416
  5.73       11      1      0             0.2791    0.0674     0.1574    0.4144
  5.88       10      0      1             0.2791    0.0674     0.1574    0.4144
  6.03        9      1      0             0.2481    0.0666     0.1308    0.3846
  6.21        8      0      1             0.2481    0.0666     0.1308    0.3846
   6.3        7      1      0             0.2126    0.0659     0.1011    0.3514
   6.6        6      0      1             0.2126    0.0659     0.1011    0.3514
   7.2        5      1      0             0.1701    0.0650     0.0670    0.3133
  9.59        4      1      0             0.1276    0.0611     0.0388    0.2711
 12.29        3      1      0             0.0851    0.0535     0.0172    0.2244
 13.18        2      1      0             0.0425    0.0403     0.0034    0.1730
 17.15        1      0      1             0.0425    0.0403     0.0034    0.1730
-------------------------------------------------------------------------------


How to cite this page

Report an error on this page

UCLA Researchers are invited to our Statistical Consulting Services
We recommend others to our list of Other Resources for Statistical Computing Help
These pages are Copyrighted (c) by UCLA Academic Technology Services


The content of this web site should not be construed as an endorsement of any particular web site, book, or software product by the University of California.