38 Reproductive Birth Spacing / Percentage of live births conceived Numerator: Women in Denominator: All Certificate of Live Birth - Life Experiences Inter-pregnancy within 18 months of a previous birth states and territories who women in states National Vital Statistics Interval have implemented the and territories who System (NVSS) Revised 2003 birth have implemented certificate who had less the Revised 2003 than 18 months between birth certificate who their previous live birth reported having a and the start of the previous live birth. pregnancy resulting in the most recent live birth. 39 Reproductive Maternal Age Both maternal age and maternal age Numerator: Median Denominator: Birth data set, which is Life Experiences at first birth (<=19, 20-24, and 25+) Mother’s Age (years) Primiparous women part of the National Vital were assessed for face validity, (women who have Statistics System (NVSS). predictive power, wide availability, only given birth to NVSS contains all live and malleability and inclusion in the one child)delivering births reported in the Index. The latter maternal age a live birth United States. The birth variable was chosen over maternal data set is the primary age as “it reflects concern about data set for analyzing delaying the first birth over the birth trends and mother’s age at any given focal patterns in the United child’s birth”. States. Birth data sets are available from Vital Stats Online and VitalStats. 40 Social Capital & Residential Percent of children who live in the Numerator: Children (1 Denominator: Total American Community Community Mobility for same house as they did a year ago to 4 yrs., 5 - 17 yrs) who children (1-4 yrs, Survey, variable Engagement, Children live in the same house as yrs) #B07001 Social Cohesion they did a year ago
38 Reproductive Life Experiences Birth Spacing / Inter-pregnancy Interval Percentage of live births conceived within 18 months of a previous birth Numerator: Women in states and territories who have implemented the Revised 2003 birth certificate who had less than 18 months between their previous live birth and the start of the pregnancy resulting in the most recent live birth. Denominator: All women in states and territories who have implemented the Revised 2003 birth certificate who reported having a previous live birth. Certificate of Live Birth - National Vital Statistics System (NVSS) 39 Reproductive Life Experiences Maternal Age Both maternal age and maternal age at first birth (<=19, 20-24, and 25+) were assessed for face validity, predictive power, wide availability, and malleability and inclusion in the Index. The latter maternal age variable was chosen over maternal age as “it reflects concern about delaying the first birth over the mother’s age at any given focal child’s birth”. Numerator: Median Mother’s Age (years) Denominator: Primiparous women (women who have only given birth to one child)delivering a live birth Birth data set, which is part of the National Vital Statistics System (NVSS). NVSS contains all live births reported in the United States. The birth data set is the primary data set for analyzing birth trends and patterns in the United States. Birth data sets are available from Vital Stats Online and VitalStats. 40 Social Capital & Community Engagement, Social Cohesion Residential Mobility for Children Percent of children who live in the same house as they did a year ago Numerator: Children (1 to 4 yrs., 5 - 17 yrs) who live in the same house as they did a year ago Denominator: Total children (1-4 yrs, yrs) American Community Survey, variable #B07001
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