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Table 4 Completeness of personal identifiers available for record linkage

From: Record linkage under suboptimal conditions for data-intensive evaluation of primary care in Rio de Janeiro, Brazil

Database

Social Benefits National Registry (Cadastro Único—CadU)

Family Health Registry (Sistema de Cadastro da Estratégia de Saúde da Família—FHR)

Eletronic Medical Registry (Prontuário Eletrônico de Pacientes—EMR)

National Hospital Admission System (Sistema de Informações Hospitalares—SIH)

National Mortality Information System (Sistema de Informações sobre Mortalidade—SIM)a

N = 1,680,700

N = 3,732,688

N = 17,764,475

N = 1,787,601

N = 2,263,964

Identifiers

%

%

%

%

%

Name

100

100

99.2

96.6

99.8

Mother’s name

99.6

100

(–)

90.2

96.6

Date of birth

100

100

100

100

97.2

Sex

100

100

100

100

100

Address

82.3

98.8

80.0

98.6

88.6

Social security number

56.5

82.7

84.0

(–)

(–)

NIS

99.6

7.3

7.3

(–)

(–)

  1. Social security number (Cadastro de Pessoa Física—CPF)
  2. National register for social benefit (Número de Inscrição Social—NIS)
  3. (–) Attribute not available in the database
  4. aExcluding fetal deaths and deaths of children under 1-year-old