Table 1 Demonstration of continuous and discrete time-to-event survival formats
Part I: Continuous time-to-event format | |||||||||
Person (i) | Date of birth | Date of interview (t0i) | Data of death or censored (t1i) | Discretized time period | Follow-up (years) (Ti) | Age at interview (years) (age at t0i) | Calendar year at interview (year at t0i) | Event status (1 = died) (0 = lived) (Di) | Sex (1 = Male) (0 = Female) |
A | 10/01/1929 | 02/06/2000 | 08/08/2003 | --- | 3.5 | 70.3 | 2000 | 1 | 1 |
B | 11/07/1932 | 07/02/2003 | 12/31/2006 | --- | 3.5 | 70.7 | 2003 | 0 | 0 |
Part II: Discrete time-to-event format | |||||||||
Person (i) & time period (j) | Date of birth | Date of interview (t0ij) | Data of death or censored (t1ij) | Discretized time period (ij) | Year of follow-up (Tij) | Age at the beginning of year of follow-up | Calendar year during follow-up (year at ij) | Event status (1 = died) (Dij) | Sex (1 = Male) (0 = Female) |
A1 | 10/01/1929 | 02/06/2000 | 12/31/2000 | 1 | 0.9 | 70.2 | 2000 | 0 | 1 |
A2 | 01/01/2001 | 12/31/2001 | 2 | 1.0 | 71.2 | 2001 | 0 | 1 | |
A3 | 01/01/2002 | 12/31/2002 | 3 | 1.0 | 72.2 | 2002 | 0 | 1 | |
A4 | 01/02/2003 | 08/08/2003 | 4 | 0.6 | 73.2 | 2003 | 1 | 1 | |
B1 | 11/07/1932 | 07/02/2003 | 12/31/2003 | 1 | 0.5 | 70.1 | 2003 | 0 | 0 |
B2 | 01/01/2004 | 12/31/2004 | 2 | 1.0 | 71.1 | 2004 | 0 | 0 | |
B3 | 01/01/2005 | 12/31/2005 | 3 | 1.0 | 72.1 | 2005 | 0 | 0 | |
B4 | 01/01/2006 | 12/31/2006 | 4 | 1.0 | 73.1 | 2006 | 0 | 0 | |