Dataset population: Persons aged 16 to 64 in households

Age

Age is derived from the date of birth question and is a person's age at their last birthday, at 27 March 2011. Dates of birth that imply an age over 115 are treated as invalid and the person's age is imputed. Infants less than one year old are classified as 0 years of age.

Approximated social grade

Social Grade is the socio-economic classification used by the Market Research and Marketing Industries, most often in the analysis of spending habits and consumer attitudes. Although it is not possible to allocate Social Grade precisely from information collected by the 2011 Census, the Market Research Society has developed a method for using Census information to provide a good approximation of Social Grade.

Sex

The classification of a person as either male or female.

Dataset population: Persons in households

Age

Age is derived from the date of birth question and is a person's age at their last birthday, at 27 March 2011. Dates of birth that imply an age over 115 are treated as invalid and the person's age is imputed. Infants less than one year old are classified as 0 years of age.

Household composition

Household composition classifies households according to the relationships between the household members. Households consisting of one family and no other usual residents are classified according to the type of family (married, same-sex civil partnership or cohabiting couple family, or lone parent family) and the number of dependent children. Other households are classified by the number of people, the number of dependent children, or whether the household consists only of students or only of people aged 65 and over.

In Northern Ireland only:

• A dependent child is a person in a household aged 0 to 15 (whether or not in a family) or a person aged 16 to 18 who is a full-time student in a family with parent(s).
• A family consists of a couple (married, same-sex civil partnership or cohabiting) with or without children, or a lone parent and their children. It also includes a married, same-sex civil partnership or cohabiting couple with their grandchildren or a lone grandparent with his or her grandchildren, if there is no parent in the intervening generation in the household. A family will also include step-children when their parent is part of the couple.

Sex

The classification of a person as either male or female.

Dataset population: Persons in households

Age

Age is derived from the date of birth question and is a person's age at their last birthday, at 27 March 2011. Dates of birth that imply an age over 115 are treated as invalid and the person's age is imputed. Infants less than one year old are classified as 0 years of age.

Household composition

Household composition classifies households according to the relationships between the household members. Households consisting of one family and no other usual residents are classified according to the type of family (married, same-sex civil partnership or cohabiting couple family, or lone parent family) and the number of dependent children. Other households are classified by the number of people, the number of dependent children, or whether the household consists only of students or only of people aged 65 and over.

In Northern Ireland only:

• A dependent child is a person in a household aged 0 to 15 (whether or not in a family) or a person aged 16 to 18 who is a full-time student in a family with parent(s).
• A family consists of a couple (married, same-sex civil partnership or cohabiting) with or without children, or a lone parent and their children. It also includes a married, same-sex civil partnership or cohabiting couple with their grandchildren or a lone grandparent with his or her grandchildren, if there is no parent in the intervening generation in the household. A family will also include step-children when their parent is part of the couple.

Sex

The classification of a person as either male or female.