|
Number of low birth weight infants
|
37,603
|
38,460
|
38,867
|
37,580
|
35,774
|
34,624
|
33,956
|
33,657
|
33,718
|
33,447
|
|
Percentage of low birth weight infants
|
6.9
|
6.8
|
6.9
|
6.8
|
6.8
|
6.8
|
6.8
|
6.7
|
6.8
|
6.7
|
|
Variable
|
|
Maternal age (years)
|
|
< 20
|
7.7
|
7.4
|
7.6
|
7.5
|
7.4
|
7.5
|
7.3
|
7.1
|
7.4
|
7.2
|
|
20–24
|
6.3
|
6.2
|
6.3
|
6.2
|
6.1
|
6.2
|
6.2
|
6.2
|
6.4
|
6.4
|
|
25–29
|
6.2
|
6.1
|
6.1
|
6.0
|
6.1
|
6.0
|
6.0
|
6.0
|
6.1
|
5.9
|
|
30–34
|
6.6
|
6.7
|
6.7
|
6.6
|
6.6
|
6.6
|
6.5
|
6.5
|
6.6
|
6.4
|
|
35–39
|
7.9
|
7.9
|
8.0
|
8.0
|
7.8
|
7.8
|
7.9
|
7.7
|
7.7
|
7.6
|
|
40–54
|
11.3
|
11.2
|
11.0
|
11.4
|
11.2
|
11.1
|
11.0
|
10.4
|
10.9
|
10.5
|
|
Maternal race and ethnicity
|
|
Hispanic
|
6.2
|
6.3
|
6.3
|
6.1
|
6.2
|
6.2
|
6.2
|
6.1
|
6.4
|
6.3
|
|
White
|
6.5
|
6.3
|
6.4
|
6.4
|
6.2
|
6.1
|
6.1
|
5.7
|
6.0
|
5.7
|
|
Asian
|
7.6
|
7.7
|
7.6
|
7.8
|
8.1
|
7.9
|
7.9
|
7.9
|
7.7
|
7.2
|
|
Pacific Islander
|
7.2
|
7.5
|
6.9
|
6.9
|
6.3
|
7.1
|
7.3
|
6.5
|
6.4
|
6.6
|
|
African American
|
12.8
|
12.2
|
12.1
|
12.4
|
12.0
|
12.2
|
11.8
|
12.0
|
11.7
|
11.8
|
|
Multiple race
|
7.8
|
7.6
|
7.8
|
7.0
|
7.6
|
7.7
|
7.1
|
7.5
|
7.3
|
7.6
|
|
American Indian
|
6.6
|
6.7
|
7.5
|
7.6
|
6.4
|
6.8
|
6.2
|
6.6
|
7.0
|
6.3
|
|
Other/unknown
|
9.1
|
9.6
|
10.2
|
10.0
|
9.3
|
10.0
|
10.1
|
9.8
|
10.2
|
10.0
|
|
Maternal education level
|
|
Less than high school diploma
|
6.6
|
6.7
|
6.6
|
6.5
|
6.6
|
6.7
|
6.6
|
6.5
|
6.8
|
6.9
|
|
High school diploma
|
7.0
|
6.8
|
6.7
|
6.8
|
6.6
|
6.6
|
6.7
|
6.5
|
6.7
|
6.6
|
|
Some college or associate degree
|
6.9
|
6.9
|
7.0
|
6.9
|
6.7
|
6.9
|
6.8
|
6.7
|
6.9
|
6.7
|
|
Bachelor’s degree or higher
|
6.8
|
6.9
|
7.0
|
6.9
|
6.9
|
6.7
|
6.6
|
6.6
|
6.5
|
6.2
|
|
Unknown
|
8.2
|
8.7
|
8.6
|
9.0
|
8.6
|
8.6
|
8.9
|
8.7
|
9.1
|
8.8
|
|
Maternal nativity
|
|
Foreign-born
|
6.2
|
6.3
|
6.4
|
6.3
|
6.4
|
6.4
|
6.5
|
6.5
|
6.6
|
6.5
|
|
United States-born
|
7.4
|
7.3
|
7.3
|
7.3
|
7.1
|
7.1
|
7.0
|
6.8
|
6.9
|
6.8
|
|
Maternal demographic region
|
|
Central Coast
|
6.4
|
6.3
|
6.1
|
6.2
|
6.0
|
5.8
|
6.1
|
5.9
|
6.2
|
6.0
|
|
Greater Bay Area
|
6.8
|
6.9
|
6.7
|
6.7
|
6.8
|
6.8
|
6.9
|
6.9
|
7.0
|
6.7
|
|
Inland Empire
|
6.9
|
6.7
|
6.9
|
6.9
|
6.8
|
6.8
|
6.7
|
6.9
|
7.1
|
6.8
|
|
Los Angeles County
|
7.3
|
7.4
|
7.4
|
7.3
|
7.2
|
7.3
|
7.1
|
6.9
|
7.0
|
6.9
|
|
Northern and Sierra
|
6.4
|
5.9
|
6.1
|
6.0
|
5.4
|
5.7
|
6.0
|
5.8
|
6.4
|
6.3
|
|
Orange County
|
6.4
|
6.4
|
6.5
|
6.4
|
6.6
|
6.4
|
6.7
|
6.3
|
6.2
|
6.3
|
|
Sacramento area
|
7.1
|
7.2
|
7.1
|
6.7
|
6.8
|
7.2
|
7.0
|
6.9
|
6.8
|
7.1
|
|
San Diego area
|
6.7
|
6.5
|
6.9
|
6.6
|
6.6
|
6.4
|
6.4
|
6.3
|
6.4
|
6.4
|
|
San Joaquin Valley
|
6.7
|
6.8
|
6.8
|
7.0
|
6.9
|
7.0
|
6.9
|
6.8
|
7.1
|
6.9
|
|
Source of prenatal care payment
|
|
Private
|
6.8
|
6.8
|
6.9
|
6.9
|
6.8
|
6.8
|
6.9
|
6.7
|
6.8
|
6.6
|
|
Medi-Cal
|
6.7
|
6.7
|
6.7
|
6.6
|
6.6
|
6.6
|
6.6
|
6.6
|
6.8
|
6.8
|
|
First trimester prenatal care initiation
|
|
Yes
|
6.7
|
6.7
|
6.8
|
6.8
|
6.7
|
6.7
|
6.7
|
6.6
|
6.8
|
6.6
|
|
No
|
7.6
|
7.2
|
6.8
|
6.6
|
6.7
|
6.8
|
6.8
|
6.7
|
6.7
|
6.8
|
|
Parity
|
|
Primiparous
|
7.2
|
7.1
|
7.2
|
7.1
|
7.1
|
7.1
|
7.1
|
7.0
|
7.1
|
6.9
|
|
Multiparous (2–5)
|
6.5
|
6.5
|
6.5
|
6.5
|
6.4
|
6.4
|
6.4
|
6.4
|
6.5
|
6.4
|
|
Multiparous (6–12)
|
11.1
|
10.3
|
10.4
|
10.4
|
10.3
|
10.4
|
9.9
|
9.7
|
10.3
|
10.5
|
|
Plurality
|
|
Singleton births
|
5.2
|
5.2
|
5.3
|
5.2
|
5.2
|
5.3
|
5.2
|
5.2
|
5.3
|
5.1
|
|
Multiple births
|
56.9
|
57.1
|
56.8
|
56.0
|
55.4
|
54.6
|
54.7
|
53.8
|
53.6
|
52.7
|
|
Maternal smoking during both first and second trimesters
|
|
No
|
N/A
|
N/A
|
6.8
|
6.7
|
6.7
|
6.7
|
6.7
|
6.6
|
6.7
|
6.6
|
|
Yes
|
N/A
|
N/A
|
11.3
|
11.2
|
11.6
|
11.4
|
11.9
|
12.3
|
12.5
|
12.6
|
|
Prepregnancy body mass index (kg/m2)
|
|
Underweight (≤18.5)
|
N/A
|
N/A
|
9.5
|
9.7
|
9.7
|
9.5
|
9.3
|
8.8
|
9.2
|
9.2
|
|
Normal (18.5–24.9)
|
N/A
|
N/A
|
6.7
|
6.8
|
6.7
|
6.7
|
6.7
|
6.6
|
6.8
|
6.5
|
|
Overweight (25.0–29.9)
|
N/A
|
N/A
|
6.3
|
6.1
|
6.0
|
6.2
|
6.3
|
6.3
|
6.3
|
6.3
|
|
Obese I (30.0–34.9)
|
N/A
|
N/A
|
6.6
|
6.3
|
6.5
|
6.7
|
6.5
|
6.2
|
6.5
|
6.7
|
|
Obese II (35.0–39.9)
|
N/A
|
N/A
|
6.8
|
6.9
|
7.0
|
6.6
|
6.2
|
6.9
|
6.8
|
6.6
|
|
Obese III (≥ 40)
|
N/A
|
N/A
|
6.9
|
7.0
|
6.5
|
7.3
|
6.6
|
6.9
|
7.2
|
6.7
|
