Basic Metadata
Note: Low Birth Weight Percentage is the number of deliveries with very low birth weight divided by the total number of live births, by geography. Births with unknown birth weight are not included.
Very Low birth weight (VLBW) is a term used to describe babies who are born weighing less than 1,500 g (approximately 3 lbs., 5 oz.). In contrast, the average newborn weighs about 8 pounds.

**Blank Cells: Percentages not calculated for fewer than 5 events. Percentages not calculated in cases where zip code is unknown.
***API: Asian/Pacific Islander.
***AIAN: American Indian/Alaska Native.

Sources: State of California, Department of Public Health, Center for Health Statistics and Informatics, Birth Statistical Master Files and Birth Public Use Files. County of San Diego, Health and Human Services Agency, Public Health Services, Maternal, Child and Family Health Services (MCFHS).
Prepared by: County of San Diego, Health & Human Services Agency, Public Health Services, Community Health Statistics Unit, 2018.

Data Guide, Dictionary, and Codebook:
https://www.sandiegocounty.gov/content/dam/sdc/hhsa/programs/phs/CHS/Community%20Profiles/Public%20Health%20Services%20Codebook_Data%20Guide_Metadata_10.18.xlsx

Interpretation: "3% of live births in Geography X were very low birth weight".

Basic Metadata
Note: The Teen Birth percentage is the proportion of teen (15‐17yrs) births out of all ages live births in a geography.

**Blank Cells: Percentages not calculated for fewer than 5 events. Percentages not calculated in cases where zip code is unknown.

***API: Asian/Pacific Islander.
***AIAN: American Indian/Alaska Native.

Prepared by: County of San Diego, Health & Human Services Agency, Public Health Services, Community Health Statistics Unit, 2019.

Sources: State of California, Department of Public Health, Center for Health Statistics and Informatics, Birth Statistical Master Files and Birth Public Use Files. County of San Diego, Health and Human Services Agency, Public Health Services, Maternal, Child and Family Health Services (MCFHS).

Data Guide, Dictionary, and Codebook:
https://www.sandiegocounty.gov/content/dam/sdc/hhsa/programs/phs/CHS/Community%20Profiles/Public%20Health%20Services%20Codebook_Data%20Guide_Metadata_10.2.19.xlsx

Interpretation: "8% of live births in Geography X were born to mothers between 15-17 years of age".

Early Prenatal Care
Note: Early Prenatal Care is the proportion of births where mother received early prenatal care divided by the total number births where prenatal care start time was known, by geography. Births with unknown start of care are not included in the denominator.

Early prenatal care is defined here as care beginning during 1st trimester of pregnancy. This does not account for frequency of care.
Limitation: Beginning in 2007, "Date of first prenatal visit" was collected in addition to the "Month prenatal care began" on birth certificates. This affects comparability of statistics before and after 2007.
Sources: State of California, Department of Public Health, Center for Health Statistics and Informatics, Birth Statistical Master Files and Birth Public Use Files. County of San Diego, Health and Human Services Agency, Public Health Services, Maternal, Child and Family Health Services (MCFHS).

Blank Cells: Percentages not calculated for fewer than 5 events.
Prepared by: County of San Diego, Health & Human Services Agency, Public Health Services, Community Health Statistics Unit, 2019.

Sample Interpretation: "85% of all births in Geography X received prenatal care".

Data Guide, Dictionary, and Codebook:
https://www.sandiegocounty.gov/content/dam/sdc/hhsa/programs/phs/CHS/Community%20Profiles/Public%20Health%20Services%20Codebook_Data%20Guide_Metadata_10.2.19.xlsx