Sample:

• 3,327 Mother-Child pairs
• 33 Communities

Individual and household data were collected with 3,327 women in 33 communities along with community data during the baseline survey. Bimonthly surveys were conducted for 2 years for a total of 12 longitudinal surveys with each mother following the birth of her child.

Files are organized as:

• Community
• Food Consumption
• Food Prices
• Person (household member)
• Mother
• Supplemental

Sample: 

• 2,399 Woman-Child pairs

The survey included women who had answered the baseline and birth information surveys of the original CLHNS. They provided reproductive histories, health histories, information on dietary intake and nutritional status, and related demographic and socioeconomic data. For each index child, information on diet, health history, nutritional status, schooling, and anthropometry was collected. In addition, anthropometric data for all younger siblings of the index children were collected.

Sample: 

• 2,300 Women-Child pairs

Additional information on family planning, women's health status, intra-household relationships, school achievement, non-verbal intelligence, vision, and hearing were added. For each child, information is available on diet, health history (major illnesses, immunizations, and hospitalizations), nutritional status (based on anthropometry), schooling, and IQ. The 1994 survey added achievement tests of Cebuano and English reading skills and mathematics.

Sample: 

• 500 Women

A new sample of about 500 women between the ages of 15 and 25 was recruited. Basic questionnaire modules from the original as well as the 1991 and 1994 follow-up surveys were administered to ensure continuity with previous rounds of data collection.

Sample:

• Girls:  1,051
• Boys:  1,161
• Mothers:  2,202

This survey added an adolescent reproductive health and sexual behavior module and measured physical activity using questionnaires and an objective measure (Caltrac). In addition, a subgroup of the sample participated in a clinical study that collected fasting blood samples and saliva. An additional pilot study examined the effects of typhoid immunization on thymic function and immune status. Blood pressure measurements in the adolescents and mothers were added to this survey. Among the mothers, memory tests and questionnaire modules on physical functioning were added.

Sample:

• Mothers:  2,113
• Children:  2,051

By 2002 the index “children” were young adults, and data were collected on their schooling outcomes and entry into the labor force. The study continued to monitor health and anthropometry of both the mothers and young adults. Reproductive histories of the young adults were added.

Sample:

• Mothers:  2,018
• Children:  1,912

The CLHNS added collection of biomarkers for the full sample. After an overnight fast, blood samples were taken for extraction of DNA, and plasma was stored for the analysis of cardiovascular disease risk factors. The study continued to track health and physical functioning of the mothers and schooling, work, and reproductive outcomes in the offspring.

Sample:

• Women:  1,977
• Children:  1,842

A limited tracking survey was conducted to maintain contact with participants and to collect reproductive histories on the index young adults so that their offspring could be tracked as well.

Sample:

• Children:  1,731

The female and male index children were interviewed. Index children have been followed through adolescence and into young adulthood, and the CHLNS is tracking their offspring as they begin to have children. The objective is to have a high quality, longitudinal intergenerational study of health. For the mothers, the objective is to follow them to the end of their reproductive careers to understand the effects of reproductive cycles on maternal health and nutritional status and to track the development of chronic disease risk factors and aging-related disabilities.