TABLE 1—
Stratification Variables, Annual Sample Sizes, Response Rates, and Incentives and Rewards: Pregnancy Risk Assessment Monitoring System, United States, 2014
| State | Stratification Variable(s) | Annual Sample Size | Weighted Response Rate, % | Incentivea | Rewarda |
| Alabama | Medicaid status | 1456 | 60.7 | Baby CD | Choice of baby items: T-shirt, sippy cup, tote bag, toothbrush |
| Alaska | Birth weight, maternal race | 1993 | 65.1 | Choice of $10 gift card or baby CD | |
| Arkansasb | Birth weight, geographic area | 951 | 58.1 | Baby picture magnet | $10 gift card, $20 gift card for phone respondents |
| Colorado | Birth weight, geographic area | 2747 | 59.1 | Pen | Quarterly drawing for $200 gift card, $10 gift card for phone respondents |
| Connecticut | Maternal race/ethnicity | 2206 | 59.6 | Pen, magnetic picture frame | $10 Walmart gift card |
| Delaware | Birth weight | 1451 | 64.5 | $30 gift cards before second mail, $20 gift cards for later respondents | |
| Florida | Birth weight, maternal race | 2589 | 47.5 | Baby bib | $10 gift card |
| Georgia | Geographic area | 2506 | 47.1 | $10 Walmart gift card | |
| Hawaii | Geographic area, birth weight | 2139 | 63.5 | $10 gift card | |
| Illinois | Birth weight | 2175 | 66.3 | Immunization card | Stationary, magnetic notepad, or bookmark |
| Iowa | Maternal race/ethnicity | 1977 | 63.6 | Baby book | $10 diaper gift certificate |
| Louisianac | Birth weight, maternal race, geographic area | 2833 | 58.5 | Baby CD | $20 Walmart gift card |
| Maine | Birth weight | 1515 | 62.1 | Birth certificate | |
| Maryland | Birth weight | 2300 | 66.4 | Manicure file | Monthly drawing for a $100 gift card |
| Massachusetts | Maternal race/ethnicity | 2847 | 60.0 | Pen | 120-minute phone card or $10 CVS gift card |
| Michiganc | Birth weight, maternal race, geographic area | 3233 | 57.4 | $10 Walmart gift card | |
| Minnesota | Maternal race | 2632 | 54.4 | Music CD or $9 birth certificate coupon | |
| Mississippid | Birth weight | … | … | Nylon cinch bag | $10 Walmart gift card |
| Missouri | Birth weight | 1723 | 68.8 | $10 gift card for mail respondents, $20 gift card for phone respondents | |
| Nebraska | Maternal race | 2669 | 60.4 | Baby bib, music CD | $5 gift card |
| New Hampshire | Birth weight | 979 | 64.0 | Pens and notepad | Birth certificate |
| New Jersey | Maternal race/ethnicity, smoking status | 1920 | 71.6 | $10 bill | $25 gift card to smokers who respond by phone |
| New Mexico | Maternal race/ethnicity, geographic area, Medicaid/WIC | 2178 | 65.7 | $10 gift card for mail respondents, $20 gift card for phone respondents | |
| New Yorke | Birth weight | 1543 | 60.9 | Baby CD | $15 CVS gift card for mail respondents, $25 CVS gift card for phone respondents |
| New York City | Birth weight | 1838 | 72.3 | $20 cash | |
| North Carolina | Birth weight | 1808 | 54.5 | Baby CD | |
| Ohio | Geographic area | 2597 | 60.1 | $10 Family Dollar gift card | |
| Oklahoma | Birth weight | 2971 | 61.8 | Baby bib | Book, music CD, lunch bag, or notepad |
| Oregon | Maternal race/ethnicity | 2713 | 57.3 | Magnetic photo frame | Drawing for a $200 gift certificate |
| Pennsylvania | Birth weight | 1674 | 68.6 | $10 bill | |
| Rhode Island | Birth weight | 2000 | 62.3 | $5 Walmart gift card | $10 Walmart gift card for mail and phone respondents |
| South Carolina | Birth weight | 1834 | 50.4 | Nylon cinch bags | $10 Walmart gift card |
| Tennessee | Birth weight | 1312 | 60.3 | Baby bib, refrigerator magnet | |
| Texas | Birth weight, maternal race/ethnicity | 2428 | 52.8 | Baby forehead thermometer | $10 gift card |
| Utah | Birth weight, maternal education | 2339 | 69.1 | Insulated lunch bag and gel pen | |
| Vermont | Birth weight | 1389 | 74.3 | Notepad and pen | Music CD |
| Virginia | Birth weight | 1139 | 49.2 | Bookmark | |
| Washington | Maternal race/ethnicity | 2201 | 60.3 | Two $50 gift certificate raffles every month | |
| West Virginia | Birth weight | 2039 | 63.4 | Birth certificate | |
| Wisconsin | Maternal race/ethnicity, geographic area | 2997 | 60.2 | $10 cash (Black women only) | Baby CD |
| Wyoming | Birth weight, maternal race | 1121 | 62.5 | Bath thermometer and pen | Music CD for mail respondents |
Note. WIC = Special Supplemental Nutrition Program for Women, Infants, and Children.
a
Baby items are not sent to women whose babies have died.
b
Arkansas 2014 data are available only for mid-April through December.
c
Louisiana and Michigan included an extra evaluation component in their samples, resulting in larger than normal sample sizes.
d
2014 data are not available for Mississippi.
e
New York excludes New York City.