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Preterm births, 34-36 weeks of gestation
Maryland - Allegany

Measurement Period: 2007-2013
HP2020 Baseline: 9 (9)
HP2020 Baseline Year: 2007
HP2020 Target: 8.1

County

9.1%

State

National

6.8%

HP 2020

8.1%
  • 6.8
  • 8.8
  • 10.3
Percent of live births that are late preterm (34 to 36 weeks of gestation)

Numerator

Number of infants born between 34 and 36 completed weeks of gestation

Population

Number of live births

2007-2013 - Dimensions

  • Aged 15-19 years (Of mother)

    11.0%
    8.5%
    13.5%
    1
    Comparison of 22 Counties
    11.0%
      Low: 6.3             High: 12.4
  • Aged <18 years (Of mother)

    14.6%
    9.4%
    19.8%
    2
    Comparison of 14 Counties
    14.6%
      Low: 7.2             High: 15.2
  • Aged 20-24 years (Of mother)

    8.2%
    6.8%
    9.5%
    0
    Comparison of 25 Counties
    8.2%
      Low: 5             High: 10.1
  • Aged 25-29 years (Of mother)

    8.0%
    6.6%
    9.4%
    0
    Comparison of 25 Counties
    8.0%
      Low: 6             High: 10
  • Aged 30-34 years (Of mother)

    9.5%
    7.6%
    11.4%
    1
    Comparison of 24 Counties
    9.5%
      Low: 5.2             High: 11.1
  • Aged 35 years and over (Of mother)

    11.7%
    8.7%
    14.7%
    1
    Comparison of 22 Counties
    11.7%
      Low: 8.2             High: 12.7
  • Aged 15-19 years; White (Of mother)

    11.0%
    8.4%
    13.5%
    1
    Comparison of 18 Counties
    11.0%
      Low: 5.5             High: 11
  • Aged 15-19 years; White, non-Hispanic (Of mother)

    10.7%
    8.1%
    13.2%
    1
    Comparison of 15 Counties
    10.7%
      Low: 7             High: 10.7
  • Aged 15-19 years; Not Hispanic or Latino (Of mother)

    10.7%
    8.2%
    13.2%
    1
    Comparison of 21 Counties
    10.7%
      Low: 5.6             High: 12
  • Aged <18 years; White (Of mother)

    14.3%
    9.0%
    19.6%
    2
    Comparison of 10 Counties
    14.3%
      Low: 7.8             High: 14.3
  • Aged <18 years; White, non-Hispanic (Of mother)

    13.3%
    8.1%
    18.5%
    2
    Comparison of 7 Counties
    13.3%
      Low: 6.2             High: 14.6
  • Aged <18 years; Not Hispanic or Latino (Of mother)

    13.7%
    8.6%
    18.8%
    2
    Comparison of 13 Counties
    13.7%
      Low: 7.4             High: 16.1
  • Aged 20-24 years; White (Of mother)

    8.1%
    6.8%
    9.5%
    0
    Comparison of 24 Counties
    8.1%
      Low: 4.8             High: 9.5
  • Aged 20-24 years; White, non-Hispanic (Of mother)

    8.2%
    6.8%
    9.5%
    0
    Comparison of 23 Counties
    8.2%
      Low: 5             High: 9
  • Aged 20-24 years; Not Hispanic or Latino (Of mother)

    8.1%
    6.8%
    9.5%
    0
    Comparison of 25 Counties
    8.1%
      Low: 5.2             High: 10.1
  • Aged 25-29 years; White (Of mother)

    8.0%
    6.6%
    9.5%
    0
    Comparison of 25 Counties
    8.0%
      Low: 5.7             High: 9.4
  • Aged 25-29 years; White, non-Hispanic (Of mother)

    8.1%
    6.7%
    9.5%
    0
    Comparison of 25 Counties
    8.1%
      Low: 5.2             High: 8.9
  • Aged 25-29 years; Not Hispanic or Latino (Of mother)

    8.1%
    6.7%
    9.5%
    0
    Comparison of 25 Counties
    8.1%
      Low: 5.9             High: 10
  • Aged 30-34 years; White (Of mother)

    9.5%
    7.5%
    11.5%
    1
    Comparison of 22 Counties
    9.5%
      Low: 5.4             High: 11.1
  • Aged 30-34 years; White, non-Hispanic (Of mother)

    9.2%
    7.3%
    11.2%
    1
    Comparison of 22 Counties
    9.2%
      Low: 5.5             High: 11.1
  • Aged 30-34 years; Not Hispanic or Latino (Of mother)

    9.2%
    7.3%
    11.1%
    1
    Comparison of 24 Counties
    9.2%
      Low: 5.4             High: 11.1
  • Aged 35 years and over; White (Of mother)

    12.1%
    9.1%
    15.2%
    1
    Comparison of 22 Counties
    12.1%
      Low: 8.1             High: 12.1
  • Aged 35 years and over; White, non-Hispanic (Of mother)

    12.4%
    9.2%
    15.5%
    1
    Comparison of 20 Counties
    12.4%
      Low: 8.1             High: 12.4
  • Aged 35 years and over; Not Hispanic or Latino (Of mother)

    11.9%
    8.9%
    14.9%
    1
    Comparison of 22 Counties
    11.9%
      Low: 8             High: 12.3
  • White (Of mother)

    9.1%
    8.2%
    9.9%
    0
    Comparison of 25 Counties
    9.1%
      Low: 6.3             High: 9.1
  • White, non-Hispanic (Of mother)

    9.0%
    8.2%
    9.8%
    0
    Comparison of 25 Counties
    9.0%
      Low: 6.4             High: 9
  • Not Hispanic or Latino (Of mother)

    9.0%
    8.2%
    9.8%
    0
    Comparison of 25 Counties
    9.0%
      Low: 7             High: 10.4
  • Total

    9.1%
    8.3%
    9.9%
    0
    Comparison of 25 Counties
    9.1%
      Low: 7             High: 10.3

Historical Data

  • Dimension20132011-20132009-20132007-201320122010-20122008-20122006-201220112009-20112007-20112005-201120102008-20102006-20102004-201020092003-20092008
    Total9.2%
    7.0% / 11.3%
    8.4%
    7.2% / 9.6%
    8.5%
    7.6% / 9.4%
    9.1%
    8.3% / 9.9%
    7.6%
    5.6% / 9.5%
    8.6%
    7.4% / 9.8%
    8.8%
    7.8% / 9.7%
    9.4%
    8.6% / 10.2%
    8.6%
    6.4% / 10.7%
    8.6%
    7.4% / 9.8%
    9.3%
    8.4% / 10.3%
    9.6%
    8.8% / 10.5%
    9.5%
    7.4% / 11.6%
    9.2%
    8.0% / 10.4%
    9.9%
    8.9% / 10.8%
    9.6%
    8.8% / 10.5%
    7.7%
    6.0% / 9.9%
    9.3%
    8.6% / 10.2%
    10.3%
    8.4% / 12.8%
    White (Of mother)8.9%
    6.7% / 11.2%
    8.3%
    7.1% / 9.6%
    8.5%
    7.6% / 9.4%
    9.1%
    8.2% / 9.9%
    7.3%
    5.3% / 9.3%
    8.5%
    7.3% / 9.7%
    8.8%
    7.8% / 9.7%
    9.4%
    8.6% / 10.3%
    8.8%
    6.5% / 11.0%
    8.7%
    7.5% / 10.0%
    9.4%
    8.5% / 10.4%
    9.7%
    8.9% / 10.6%
    9.4%
    7.3% / 11.6%
    9.3%
    8.0% / 10.5%
    9.9%
    9.0% / 10.9%
    9.7%
    8.9% / 10.6%
    8.1%
    6.3% / 10.3%
    9.4%
    8.6% / 10.3%
    10.3%
    8.3% / 12.8%
    White, non-Hispanic (Of mother)8.7%
    6.5% / 10.9%
    8.3%
    7.1% / 9.5%
    8.4%
    7.5% / 9.4%
    9.0%
    8.2% / 9.8%
    7.4%
    5.4% / 9.4%
    8.5%
    7.3% / 9.8%
    8.8%
    7.8% / 9.7%
    9.4%
    8.6% / 10.2%
    8.9%
    6.6% / 11.1%
    8.7%
    7.4% / 9.9%
    9.4%
    8.4% / 10.4%
    9.7%
    8.9% / 10.6%
    9.4%
    7.2% / 11.5%
    9.2%
    7.9% / 10.4%
    9.9%
    8.9% / 10.9%
    9.7%
    8.9% / 10.5%
    7.9%
    6.1% / 10.1%
    9.4%
    8.6% / 10.3%
    10.3%
    8.3% / 12.8%
    Not Hispanic or Latino (Of mother)9.0%
    6.8% / 11.2%
    8.4%
    7.2% / 9.6%
    8.4%
    7.5% / 9.3%
    9.0%
    8.2% / 9.8%
    7.5%
    5.5% / 9.5%
    8.5%
    7.3% / 9.7%
    8.7%
    7.8% / 9.6%
    9.3%
    8.5% / 10.1%
    8.7%
    6.5% / 10.9%
    8.5%
    7.3% / 9.7%
    9.3%
    8.3% / 10.3%
    9.6%
    8.8% / 10.4%
    9.3%
    7.2% / 11.4%
    9.1%
    7.9% / 10.3%
    9.8%
    8.8% / 10.8%
    9.6%
    8.8% / 10.4%
    7.5%
    5.8% / 9.7%
    9.3%
    8.5% / 10.2%
    10.4%
    8.3% / 12.8%
    Aged 20-24 years (Of mother)DSU7.2%
    5.2% / 9.2%
    7.3%
    5.8% / 8.8%
    8.2%
    6.8% / 9.5%
    DSU7.1%
    5.1% / 9.0%
    7.9%
    6.3% / 9.4%
    8.5%
    7.2% / 9.9%
    DSU7.8%
    5.8% / 9.8%
    8.8%
    7.2% / 10.4%
    9.0%
    7.6% / 10.4%
    DSU8.7%
    6.7% / 10.7%
    9.3%
    7.6% / 10.9%
    8.8%
    7.4% / 10.1%
    DSU8.2%
    6.9% / 9.6%
    11.0%
    7.7% / 15.4%
    Aged 25-29 years (Of mother)DSU6.9%
    4.9% / 9.0%
    7.4%
    5.8% / 9.0%
    8.0%
    6.6% / 9.4%
    DSU8.4%
    6.2% / 10.6%
    8.1%
    6.5% / 9.8%
    8.4%
    7.0% / 9.8%
    DSU8.0%
    5.8% / 10.1%
    8.7%
    7.0% / 10.4%
    8.9%
    7.4% / 10.4%
    10.9%
    6.8% / 15.0%
    8.8%
    6.6% / 11.0%
    8.9%
    7.2% / 10.7%
    9.1%
    7.6% / 10.7%
    DSU8.9%
    7.4% / 10.5%
    10.5%
    7.0% / 15.2%
    Aged 30-34 years (Of mother)DSU11.3%
    8.2% / 14.5%
    9.8%
    7.4% / 12.1%
    9.5%
    7.6% / 11.4%
    DSU10.0%
    7.0% / 13.1%
    8.5%
    6.3% / 10.7%
    9.9%
    7.9% / 11.9%
    DSU7.4%
    4.7% / 10.2%
    8.1%
    5.9% / 10.2%
    9.1%
    7.2% / 11.0%
    DSU7.0%
    4.4% / 9.6%
    9.5%
    7.2% / 11.8%
    8.9%
    7.0% / 10.8%
    DSU9.0%
    7.3% / 11.1%
    DSU
    Aged 35 years and over (Of mother)DSU12.0%
    7.4% / 16.6%
    12.9%
    9.3% / 16.6%
    11.7%
    8.7% / 14.7%
    DSU12.4%
    7.7% / 17.0%
    12.3%
    8.7% / 16.0%
    11.4%
    8.5% / 14.3%
    DSU13.7%
    8.9% / 18.5%
    11.7%
    8.2% / 15.2%
    11.7%
    8.8% / 14.6%
    DSU12.3%
    7.6% / 17.0%
    11.0%
    7.6% / 14.3%
    11.3%
    8.5% / 14.2%
    DSU10.7%
    8.2% / 13.9%
    DSU
    Aged 20-24 years; White (Of mother)DSU7.3%
    5.2% / 9.4%
    7.4%
    5.9% / 9.0%
    8.1%
    6.8% / 9.5%
    DSU7.3%
    5.2% / 9.3%
    7.8%
    6.2% / 9.4%
    8.5%
    7.1% / 9.9%
    DSU8.0%
    5.9% / 10.0%
    8.7%
    7.1% / 10.4%
    8.9%
    7.5% / 10.3%
    DSU8.4%
    6.4% / 10.4%
    9.1%
    7.5% / 10.8%
    8.7%
    7.3% / 10.1%
    DSU8.0%
    6.8% / 9.5%
    9.9%
    6.7% / 14.3%
    Aged 20-24 years; White, non-Hispanic (Of mother)DSU7.4%
    5.3% / 9.5%
    7.4%
    5.8% / 9.0%
    8.2%
    6.8% / 9.5%
    DSU7.3%
    5.3% / 9.4%
    7.8%
    6.2% / 9.4%
    8.6%
    7.2% / 10.0%
    DSU7.9%
    5.9% / 10.0%
    8.7%
    7.1% / 10.4%
    9.0%
    7.5% / 10.4%
    DSU8.4%
    6.3% / 10.4%
    9.2%
    7.5% / 10.9%
    8.7%
    7.3% / 10.1%
    DSU8.1%
    6.8% / 9.5%
    10.0%
    6.8% / 14.5%
    Aged 20-24 years; Not Hispanic or Latino (Of mother)DSU7.2%
    5.2% / 9.3%
    7.2%
    5.7% / 8.7%
    8.1%
    6.8% / 9.5%
    DSU7.0%
    5.0% / 9.0%
    7.8%
    6.3% / 9.4%
    8.5%
    7.1% / 9.9%
    DSU7.6%
    5.6% / 9.6%
    8.7%
    7.1% / 10.4%
    9.0%
    7.6% / 10.4%
    DSU8.5%
    6.5% / 10.6%
    9.2%
    7.6% / 10.9%
    8.7%
    7.3% / 10.1%
    DSU8.2%
    6.9% / 9.7%
    11.1%
    7.8% / 15.6%
    Aged 25-29 years; White (Of mother)DSU6.5%
    4.5% / 8.5%
    7.2%
    5.6% / 8.8%
    8.0%
    6.6% / 9.5%
    DSU8.3%
    6.2% / 10.5%
    8.3%
    6.6% / 10.0%
    8.6%
    7.1% / 10.0%
    DSU8.0%
    5.8% / 10.2%
    8.9%
    7.1% / 10.7%
    9.1%
    7.6% / 10.7%
    11.0%
    6.8% / 15.2%
    9.1%
    6.8% / 11.4%
    9.2%
    7.4% / 11.0%
    9.3%
    7.8% / 10.9%
    DSU9.1%
    7.6% / 10.8%
    11.2%
    7.5% / 16.2%
    Aged 25-29 years; White, non-Hispanic (Of mother)DSU6.6%
    4.6% / 8.6%
    7.2%
    5.6% / 8.8%
    8.1%
    6.7% / 9.5%
    DSU8.4%
    6.2% / 10.6%
    8.3%
    6.6% / 10.0%
    8.6%
    7.2% / 10.1%
    DSU8.0%
    5.8% / 10.2%
    9.0%
    7.2% / 10.7%
    9.2%
    7.7% / 10.8%
    11.0%
    6.8% / 15.2%
    9.2%
    6.9% / 11.5%
    9.3%
    7.5% / 11.1%
    9.3%
    7.8% / 10.9%
    DSU9.1%
    7.6% / 10.8%
    11.3%
    7.6% / 16.4%
    Aged 25-29 years; Not Hispanic or Latino (Of mother)DSU7.0%
    5.0% / 9.1%
    7.4%
    5.8% / 9.1%
    8.1%
    6.7% / 9.5%
    DSU8.5%
    6.3% / 10.7%
    8.2%
    6.6% / 9.9%
    8.5%
    7.0% / 9.9%
    DSU8.0%
    5.9% / 10.2%
    8.8%
    7.0% / 10.5%
    9.0%
    7.5% / 10.5%
    10.9%
    6.8% / 15.0%
    8.9%
    6.7% / 11.1%
    9.0%
    7.2% / 10.8%
    9.1%
    7.6% / 10.7%
    DSU8.9%
    7.4% / 10.5%
    10.6%
    7.2% / 15.5%
    Aged 30-34 years; White (Of mother)DSU11.2%
    7.9% / 14.4%
    9.6%
    7.2% / 11.9%
    9.5%
    7.5% / 11.5%
    DSU9.4%
    6.3% / 12.4%
    8.3%
    6.1% / 10.5%
    9.7%
    7.7% / 11.7%
    DSU7.4%
    4.6% / 10.2%
    8.2%
    6.0% / 10.5%
    9.2%
    7.2% / 11.2%
    DSU7.0%
    4.4% / 9.7%
    9.5%
    7.1% / 11.8%
    9.0%
    7.1% / 10.9%
    DSU9.3%
    7.5% / 11.4%
    DSU
    Aged 30-34 years; White, non-Hispanic (Of mother)DSU10.8%
    7.6% / 14.0%
    9.3%
    7.0% / 11.7%
    9.2%
    7.3% / 11.2%
    DSU9.4%
    6.4% / 12.5%
    8.2%
    6.0% / 10.4%
    9.6%
    7.6% / 11.6%
    DSU7.5%
    4.7% / 10.3%
    8.1%
    5.9% / 10.4%
    9.2%
    7.2% / 11.2%
    DSU6.8%
    4.1% / 9.4%
    9.4%
    7.0% / 11.7%
    8.9%
    7.0% / 10.9%
    DSU9.2%
    7.5% / 11.3%
    DSU
    Aged 30-34 years; Not Hispanic or Latino (Of mother)DSU10.7%
    7.6% / 13.8%
    9.4%
    7.1% / 11.7%
    9.2%
    7.3% / 11.1%
    DSU9.8%
    6.8% / 12.9%
    8.3%
    6.1% / 10.5%
    9.7%
    7.7% / 11.7%
    DSU7.5%
    4.7% / 10.2%
    8.0%
    5.8% / 10.1%
    9.1%
    7.1% / 11.0%
    DSU6.8%
    4.2% / 9.3%
    9.4%
    7.1% / 11.7%
    8.9%
    7.0% / 10.8%
    DSU9.0%
    7.3% / 11.0%
    DSU
    Aged 35 years and over; White (Of mother)DSU12.4%
    7.6% / 17.3%
    13.6%
    9.7% / 17.4%
    12.1%
    9.1% / 15.2%
    DSU12.6%
    7.8% / 17.5%
    12.8%
    9.0% / 16.5%
    11.7%
    8.7% / 14.6%
    DSU14.7%
    9.6% / 19.8%
    12.3%
    8.6% / 15.9%
    12.2%
    9.1% / 15.2%
    DSU12.9%
    8.0% / 17.8%
    11.3%
    7.9% / 14.8%
    11.8%
    8.8% / 14.8%
    DSU11.2%
    8.6% / 14.4%
    DSU
    Aged 35 years and over; White, non-Hispanic (Of mother)DSU12.6%
    7.7% / 17.6%
    13.9%
    9.9% / 17.8%
    12.4%
    9.2% / 15.5%
    DSU12.8%
    7.9% / 17.8%
    13.0%
    9.2% / 16.9%
    11.6%
    8.6% / 14.6%
    DSU15.0%
    9.8% / 20.2%
    12.5%
    8.8% / 16.2%
    12.2%
    9.1% / 15.3%
    DSU13.2%
    8.2% / 18.3%
    11.3%
    7.8% / 14.7%
    11.8%
    8.8% / 14.8%
    DSU11.1%
    8.5% / 14.4%
    DSU
    Aged 35 years and over; Not Hispanic or Latino (Of mother)DSU12.2%
    7.5% / 16.8%
    13.2%
    9.5% / 16.9%
    11.9%
    8.9% / 14.9%
    DSU12.6%
    7.9% / 17.3%
    12.6%
    8.9% / 16.3%
    11.4%
    8.4% / 14.3%
    DSU14.0%
    9.1% / 18.9%
    11.9%
    8.3% / 15.4%
    11.7%
    8.7% / 14.7%
    DSU12.6%
    7.8% / 17.4%
    10.9%
    7.5% / 14.2%
    11.3%
    8.4% / 14.2%
    DSU10.7%
    8.2% / 13.9%
    DSU
    Aged 15-19 years (Of mother)DSUDSU9.0%
    6.2% / 11.7%
    11.0%
    8.5% / 13.5%
    DSUDSU10.2%
    7.3% / 13.1%
    11.5%
    9.0% / 14.0%
    DSU9.8%
    6.3% / 13.2%
    12.0%
    9.0% / 14.9%
    11.8%
    9.4% / 14.3%
    DSU12.1%
    8.2% / 16.0%
    13.0%
    10.0% / 16.0%
    12.6%
    10.0% / 15.1%
    DSU12.5%
    10.2% / 15.2%
    DSU
    Aged 15-19 years; White (Of mother)DSUDSU9.2%
    6.3% / 12.0%
    11.0%
    8.4% / 13.5%
    DSUDSU10.4%
    7.4% / 13.4%
    11.6%
    9.0% / 14.2%
    DSU9.8%
    6.3% / 13.3%
    11.8%
    8.8% / 14.8%
    11.8%
    9.2% / 14.3%
    DSU12.3%
    8.3% / 16.3%
    13.1%
    9.9% / 16.2%
    12.6%
    10.0% / 15.1%
    DSU12.6%
    10.2% / 15.4%
    DSU
    Aged 15-19 years; White, non-Hispanic (Of mother)DSUDSU8.7%
    5.9% / 11.5%
    10.7%
    8.1% / 13.2%
    DSUDSU10.0%
    7.0% / 12.9%
    11.3%
    8.8% / 13.9%
    DSU9.2%
    5.7% / 12.6%
    11.5%
    8.5% / 14.4%
    11.5%
    9.0% / 14.0%
    DSU11.6%
    7.7% / 15.5%
    12.7%
    9.6% / 15.8%
    12.3%
    9.7% / 14.9%
    DSU12.5%
    10.1% / 15.3%
    DSU
    Aged 15-19 years; Not Hispanic or Latino (Of mother)DSUDSU8.5%
    5.8% / 11.2%
    10.7%
    8.2% / 13.2%
    DSUDSU9.8%
    6.9% / 12.6%
    11.3%
    8.8% / 13.8%
    DSU9.1%
    5.8% / 12.5%
    11.6%
    8.7% / 14.6%
    11.6%
    9.2% / 14.1%
    DSU11.4%
    7.6% / 15.2%
    12.7%
    9.7% / 15.7%
    12.3%
    9.8% / 14.9%
    DSU12.4%
    10.1% / 15.1%
    DSU
    Aged <18 years (Of mother)DSUDSUDSU14.6%
    9.4% / 19.8%
    DSUDSU15.4%
    9.2% / 21.6%
    16.8%
    11.6% / 22.1%
    DSUDSU16.9%
    10.7% / 23.1%
    18.4%
    13.1% / 23.6%
    DSUDSU19.2%
    12.9% / 25.5%
    17.6%
    12.5% / 22.8%
    DSU16.0%
    11.8% / 21.4%
    DSU
    Aged <18 years; White (Of mother)DSUDSUDSU14.3%
    9.0% / 19.6%
    DSUDSUDSU17.1%
    11.7% / 22.5%
    DSUDSU16.9%
    10.6% / 23.2%
    18.2%
    12.8% / 23.6%
    DSUDSU19.6%
    13.1% / 26.1%
    17.5%
    12.2% / 22.8%
    DSU16.4%
    12.0% / 21.9%
    DSU
    Aged <18 years; White, non-Hispanic (Of mother)DSUDSUDSU13.3%
    8.1% / 18.5%
    DSUDSUDSU16.3%
    11.0% / 21.6%
    DSUDSU15.8%
    9.6% / 22.0%
    17.4%
    12.1% / 22.8%
    DSUDSU18.6%
    12.1% / 25.0%
    16.8%
    11.5% / 22.0%
    DSU16.0%
    11.7% / 21.6%
    DSU
    Aged <18 years; Not Hispanic or Latino (Of mother)DSUDSUDSU13.7%
    8.6% / 18.8%
    DSUDSUDSU16.1%
    10.9% / 21.4%
    DSUDSU15.8%
    9.8% / 21.9%
    17.7%
    12.5% / 23.0%
    DSUDSU18.4%
    12.1% / 24.6%
    17.0%
    11.9% / 22.1%
    DSU15.8%
    11.5% / 21.2%
    DSU
  • DSU - Data statistically unreliable.

Methodology

  • Estimates of preterm birth are calculated based on gestational age information reported on the birth certificate. The primary measure used to determine the gestational age of the newborn is the interval between the first day of the mother’s last normal menstrual period (LMP) and the date of birth, and presented as number of weeks. It is subject to error for several reasons, including imperfect maternal recall or misidentification of the LMP because of postconception bleeding, delayed ovulation, or intervening early miscarriage. These data are edited for LMP-based gestational ages that are clearly inconsistent with the infant’s plurality and birthweight, but reporting problems for this item persist and may occur more frequently among some subpopulations and among births with shorter gestations.

     

    The 1989 revision of the U.S. Standard Certificate of Live Birth includes an item, “clinical estimate of gestation” and the 2003 revision of the birth certificate includes a comparable item “Obstetric estimate of gestation”. The clinical or obstetric estimate was compared with length of gestation computed using the LMP when the latter appears to be inconsistent with birth weight. This was done for normal weight births of apparently short gestations and very low birth weight births reported to be full term. For those births, the clinical or obstetric estimate was used if it was compatible with the reported birth weight. The clinical or gestation estimate was also used if the LMP date was not reported.

     

    A description of the primary measurement used to determine the infant’s gestational age, the interval between the first day of LMP and the birth has been published by NCHS.

References

  • National Center for Health Statistics. User guide to the 2010 natality public use file. Hyattsville, MD.

Data Source(s)

  • National Vital Statistics System-Natality (NVSS-N)

    Description Vital statistics natality data are a fundamental source of demographic, geographic, and medical and health information on all births occurring in the United States. This is one of the few sources of comparable health-related data for small geographic areas over an extended period of time. The data are used to present the characteristics of babies and their mothers, track trends such as birth rates for teenagers, and compare natality trends with those in other countries.

    MethodologyThe National Vital Statistics System Natality component (NVSS-N) obtains information on deaths from the registration offices of each of the 50 states, New York City, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, and Northern Mariana Islands. By law, registration of deaths is the responsibility of the professional attendant at birth, generally a physician or midwife. The birth certificate must be filed with the local registrar in the district in which the birth occurred, within a time period prescribed by law (generally 1 to 10 days). State birth certificates are modeled on a U.S. Standard Certificate that is revised periodically. States provide the National Center for Health Statistics (NCHS) with birth records in electronic format.


 
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