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2002 PRAMS Surveillance Report: Appendix B. Stratification Variables, Sample Sizes, and Response Rates, 2002

State Stratification Variables Number Sampled Unweighted
Response
Rate
Weighted
Response
Rate
Alabama Birthweight (< 2,500 g, ≥ 2,500 g); Medicaid status (yes, no) 2,091 75.0% 77.0%
Alaska Race (Alaska Native, all other races, race unknown); birthweight (< 2,500 g, ≥ 2,500 g) 1,887 86.1% 88.0%
Arkansas Birthweight (< 2,500 g, ≥ 2,500 g); population density (low, medium, high) 2,624 75.1% 75.7%
Colorado Birthweight (< 2,500 g, ≥ 2,500 g); region of state (Denver, other metropolitan, rural) 3,113 73.7% 75.0%
Florida Birthweight (< 2,500 g, ≥ 2,500 g); age (< 20 years, ≥ 20 years); race (black/ African American, white, all other races) 2,696 75.2% 77.6%
Hawaii Region of state (Oahu resident, non-Oahu resident); race (Native Hawaiian, all other races) 2,244 81.2% 81.8%
Illinois Birthweight (< 2,500 g, ≥ 2,500 g) 2,345 82.6% 83.0%
Louisiana Birthweight (< 1,500 g, ≥ 1,500 g); region of state (urban, rural) 2,357 72.3% 73.3%
Maine Birthweight (< 2,500 g, ≥ 2,500 g, unknown) 1,523 74.9% 77.0%
Maryland Birthweight (< 2,500 g, ≥ 2,500 g); age (≤ 34 years, ≥ 35 years) 2,078 70.4% 71.6%
Michigan Region of state (southeast Michigan, other urban, all other regions); birthweight (< 2,500 g, ≥ 2,500 g) 2,150 71.9% 73.8%
Minnesotaa Race (black/ African American, American Indian, all other races) 1,971 58.5% 76.5%
Montana Age (≤ 19 years, ≥ 20 years) 1,363 76.7% 78.8%
Nebraska Race (white, black/ African American, American Indian, Asian or Pacific Islander, Hispanic) 2,479 76.4% 82.3%
New Jerseyb Smoking status (yes, no); race (white, black/ African American, Hispanic, Asian) 1,397 68.1% 71.7%
New Mexico District (1, 2, 3, 4); region of state (urban, rural) 2,243 69.6% 70.1%
New Yorkc Birthweight (< 2,500 g, ≥ 2,500 g) 1,674 73.4% 74.5%
North Carolina Birthweight (< 2,500 g, ≥ 2,500 g) 2,104 73.7% 76.1%
North Dakota Medicaid status (yes, no) 1,245 73.0% 76.9%
Ohio Birthweight (< 2,500 g, ≥ 2,500 g); race (black/ African American, nonblack/ non-African American) 2,037 67.7% 76.5%
Oklahoma Birthweight (< 1,500 g, 1,500–2,499 g, 2,500–3,999 g, ≥ 4,000 g, unknown) 2,338 80.3% 83.7%
Rhode Island Birthweight (< 2,500 g, ≥ 2,500 g); region of state (core cities, rest of state) 2,056 68.8% 71.7%
South Carolina Birthweight (< 1,500 g, 1,500–2,499 g, ≥ 2,500 g) 2,146 66.1% 69.9%
Utah Birthweight (< 2,500 g, ≥ 2,500 g); race (black/ African American, Asian/ Pacific Islander or American Indian, white/other race) 2,096 75.5% 82.3%
Vermont Birthweight (< 2,500 g, ≥ 2,500 g, unknown) 1,296 85.2% 85.8%
Washington Race (Hispanic, black/ African American, American Indian, Asian, white); region of state (King/Snohomish counties, other county) 2,033 74.8% 80.8%
West Virginia Birthweight (< 2,500 g, ≥ 2,500 g); age (≤ 19 years, ≥ 20 years) 2,418 70.3% 74.1%
Notes: Number sampled is the number of women sampled in each state in 2002.
Unweighted response rate is the proportion of women sampled who completed a survey.
Weighted response rate is the unweighted response rate adjusted for sample design.
a Data represent Minnesota births from May–December 2002.
b Data represent New Jersey births from July–December 2002.
c Data exclude New York City.

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Page last reviewed: 5/13/09
Page last modified: 8/23/06
Content source: Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion

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