Format (SURVIVAL command)

WRITE writes five types of records. The keyword TABLES writes record types 30, 31, and 40. The keyword BOTH writes record types 10, 20, 30, 31, and 40. The format of each record type is described in the following tables.

• One type-10 record is produced for each life table.
• Column 48 specifies the number of orders of control variables (0, 1, or 2) that have been applied to the life table.
• Columns 49-52 specify the number of rows in the life table. This number is the number of intervals in the analysis that show subjects entering; intervals in which no subjects enter are not noted in the life tables.

  Table 2. Record type 20, produced by keyword BOTH

  Columns	Content	Format
  1–2	Record type (20)	F2.0
  3–7	Table number	F5.0
  8-47	Variable label of control variable	A40
  48-52	Value of control variable	F5.0
  53-72	Value label for this value	A20
  73-136	Name of control variable	A64

• One type-20 record is produced for each control variable in each life table.
• If only first-order controls have been placed in the survival analysis, one type-20 record will be produced for each table. If second-order controls have also been applied, two type-20 records will be produced per table.

  Table 3. Record type 30, produced by both keywords TABLES and BOTH

  Columns	Content	Format
  1–2	Record type (30)	F2.0
  3–7	Table number	F5.0
  8–13	Beginning of interval	F6.2
  14–21	Number entering interval	F8.2
  22–29	Number withdrawn in interval	F8.2
  30–37	Number exposed to risk	F8.2
  38–45	Number of terminal events	F8.2

• Information on record type 30 continues on record type 31. Each pair of type-30 and type-31 records contains the information from one line of the life table.

  Table 4. Record type 31, continuation of record type 30

  Columns	Content	Format
  1–2	Record type (31)	F2.0
  3–7	Table number	F5.0
  8–15	Proportion terminating	F8.6
  16–23	Proportion surviving	F8.6
  24–31	Cumulative proportion surviving	F8.6
  32–39	Probability density	F8.6
  40–47	Hazard rate	F8.6
  48–54	S.E. of cumulative proportion surviving	F7.4
  55–61	S.E. of probability density	F7.4
  62–68	S.E. of hazard rate	F7.4

• Record type 31 is a continuation of record type 30.
• As many type-30 and type-31 record pairs are output for a table as it has lines (this number is noted in columns 57–60 of the type-10 record for the table).

  Table 5. Record type 40, produced by both keywords TABLES and BOTH

  Columns	Content	Format
  1–2	Record type (40)	F2.0

• Type-40 records indicate the completion of the series of records for one life table.