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Concepts and Definitions - Statistics New Zealand

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					                                             CONCEPTS AND DEFINITIONS - VITAL STATISTICS (Births, deaths and marriages)

1. Source of Data
Births, Deaths and Marriages registers administered by the Department of Internal Affairs.

2. Coverage
All deaths and marriages registered in New Zealand and all births registered not more than two years
after the birth. Unless otherwise requested, vitals data is output by date of registration (not date of
occurrence).

Birth registrations for 1998 are lower than expected because of a small change to the rate at which births
were registered during 1998.

3. Output Definitions
Areas:
Area unit - Area units aggregate to define territorial authority, regional council, urban and
statistical areas. Each area unit is a single geographic entity with a unique name referring to a geographic
feature. At the 2006 Census there were 1,927 area units.

Territorial authority areas - The boundaries of territorial authorities are defined according to community of
interest considerations. At March 2006 there were 73 territorial authorities comprising 16 cities, 56 districts
and 1 territory.

Urban areas - Urban areas are statistically defined with no administrative or legal basis. They are designed
to identify concentrated urban or semi-urban settlements. There are main, secondary and minor urban areas
which constitute the urban population of New Zealand. There are 25 main urban areas and zones, 14
secondary and 99 minor urban areas.

Regional council areas - The geographic boundaries of regions conform as far as practical to the
boundaries of one or more water catchments. There are 16 regional council areas.

Statistical areas - These are broad geographic regions which do not conform to any legal or administrative
boundaries. There are 13 statistical areas.

4. Definitions

Ethnic Origin (for March Quarter 1980 - September Quarter 1995)
Births and deaths are classified as NZ Mäori or Pacific Islander (defined as those with half or more Mäori or
Pacific Island blood) or Non-NZ Mäori / Non-Pacific Islander, according to the ethnic origin of the parents. In
the case of ex-nuptial births where the particulars of the father are not known, the birth is classified for
statistical purposes according to the ethnic origin of the mother.

Ethnicity (for December Quarter 1995 onwards)
Ethnicity refers to the ethnic group or groups that a person identifies with. Prior to June 1998, up to three
ethnic groups were captured; after that date all responses have been captured.

Nuptial Birth
A child born to parents who are legally married or in a civil union at the time of birth.

Ex-Nuptial Birth
A child born to parents who are not legally married or in a civil union at the time of birth. Ex-nuptial births include
births to parents in a de facto union.

Confinement
A pregnancy resulting in either liveborn or stillborn children. Such an event is counted as one confinement
irrespective of whether a single or multiple birth results.

Still Birth
A dead foetus that:
(a) weighs 400g or more when issued from its mother; or
(b) is issued from its mother after the 20th week of pregnancy.
The Births, Deaths and Marriages Registration Act 1995, which took effect from 1 September 1995,
redefined what constituted a stillbirth. Before the new Act a stillbirth was defined as a child born dead after
28 weeks of pregnancy. This change in definition means that stillbirths from September 1995 onwards are
not directly comparable with earlier years.

Infant Deaths
The death of a child (who was born alive) before the age of one year.
5. Range and type of statistics:
Birth Variable                     Description
Live or still born                 Whether the child was still born or born live
Date of birth                      Day, month and year
Sex of child                       Male or female
Ethnicity of child                 Ethnic group the parents identify for the child
Ethnicity of mother                Ethnic group mother identifies with
Ethnicity of father                Ethnic group father identifies with
Ancestry of child                  Whether the child is descended from a New Zealand Mäori
Ancestry of mother                 Whether the mother is descended from a New Zealand Mäori
Ancestry of father                 Whether the father is descended from a New Zealand Mäori
Single or multiple birth           Single births, twins, triplets, quads, quinns and sextuplets
Order of birth                     For multiple births the order the child was delivered
Birth weight                       Weight of the child at time of birth
Gestation period                   Period of pregnancy in weeks
Nuptial or ex-nuptial birth        Nuptial births born to parents who are legally married or in a civil union at the
                                   time of the birth. Ex-nuptial births born to parents who are not legally married
                                   or in a civil union at the time of the birth.
Registry Office                    Name of registry office where the birth was registered
(available until June 98)
Age of mother                      At the time of birth (including mother's date of birth)
Locality of birth                  Where the child was delivered: Home, Public Hospital, Private Hospital or
(available until June 98)          Other
Residence of mother                Mother's home address
Number of previous children        Number of previous children from the current relationship
(mother)
Birthplace of mother               Country of birth
Occupation of mother               Usual occupation
(available until June 98)
Age of father                      At the time of birth (including father's date of birth)
Birthplace of father               Country of birth
Occupation of father               Usual occupation
(available until June 98)
Parent's relationship              Married or in a civil union, de facto, unpartnered and not stated
(available from July 2006)

Death Variable                     Description
Age                                Age at death
Locality of death                  Where the deceased died: Home, Public Hospital, Private Hospital or Other
(available until June 98)
Occupation                         Usual occupation
(available until June 98)
Residence                          Area or country where deceased usually resided
Sex                                Male or female
Date of birth                      Day, year and month of birth
Date of death                      Day, year and month of death
(available from 1998)
Birthplace                         Country of birth
Relationship status                Relationship status of deceased
Ethnicity                          Ethnic group the deceased identified with
Ancestry                           Whether the deceased is descended from a New Zealand Mäori
Registry Office                    Name of registry office where the death was registered
(available until June 98)

Marriage Variable                  Description
Bridegroom's Age                   At the time of marriage
Occupation of Bridegroom           Usual occupation
(available until June 98)
Bridegroom's Marital Status        Marital status of bridegroom at marriage
Bridegroom's Birth Place           Country of birth
Bride's Age                        At the time of marriage
Occupation of Bride                Usual occupation
(available until June 98)
Bride's Marital Status             Marital status of bride at marriage
Bride's Birth Place                Country of birth
Registry Office                    Name of registry office where the marriage was registered
(available until June 98)
Denomination of Minister           Denomination of minister officiating marriage
(available until June 98)
Residence of Bridegroom            Territorial authority where bridegroom usually lives
Date of Marriage                   Year, month and day of marriage

				
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