Definitions of the age groups appearing in occ_1881.

Table ID:

OCC_1881_AGE_GROUPS     (1251823)

Contents:

Definitions of the age groups appearing in occ_1881.

Approx. number of rows:

31

Table type:

Codebook

Documentation Author:

Humphrey Southall

Chronology:

The data are for the single year 1881.

Sources:

1. This code book was constructed by Humphrey Southall in September 2002 based on the definition of the age groups specified by him to the History Data Service and used by them in constructing the 'occ_1881' table.

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Notes:

1. The History Data Service created the 'age_group' values in 'occ_1881' by using the function:

   ceiling((whole1881.age+1)/5)
   

   This places each individual into a five year band, starting with 0 to 4, 5 to 9 and so on, but unlike the published census reports there is no catch-all top category (e.g. '100 and upwards'). This table therefore runs up to age_group=30, ages 145-9 so as to cover the highest actual value. Age-group = 99 is included to cover unknown values.

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Checking:

1. Code book generated by calculations in Excel; correct by definition.

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Indices:

Index	Type	Column(s) indexed
occ_1881_age_groups_pkey	Primary key	age_group

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Constraints:

The table has the following associated constraints:

Constraint	Type	Details
occ_1881_age_groups_pkey	Primary Key	See details above for primary key index

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Columns within table:

Column	Type	Contents
age_group	Integer number.	Values of 'age_group' as they appear in 'occ_1881', running from 1 (0 to 4) to 30 (145-9).
min_age	Integer number.	Lowest age, in years, within the age group.
max_age	Integer number.	Highest age, in years, within the age group.
age_label	Text string (max.len.=15).	Text describing the age group, e.g. '0 to 4'.