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Infant Gestation Duration*

1999 North Carolina Pregnancy Risk Assessment Monitoring System Survey Results
  37 or more weeks Less than 37 weeks
Demographic Groups Total Respondents N % 95% C.I. N % 95% C.I.
Total 1746 1019 89.4 87.9-90.7 727 10.6 9.3-12.1
Age
< 20 years 260 147 89.6 85.5-92.7 113 10.4 7.3-14.5
20-24 years 461 272 90.1 87.0-92.5 189 9.9 7.5-13.0
25-34 years 826 482 88.5 86.2-90.5 344 11.5 9.5-13.8
35+ years 199 118 90.7 85.9-94.0 81 9.3 6.0-14.1
Mother's Race
White 1181 742 90.4 88.6-91.9 439 9.6 8.1-11.4
African American 504 239 85.4 81.9-88.4 265 14.6 11.6-18.1
Other Minorities 61 38 93.9 89.8-96.5 23 6.1 3.5-10.2
Hispanic origin
Yes 109 73 91.7 85.2-95.5 36 8.3 4.5-14.8
No 1637 946 89.1 87.6-90.5 691 10.9 9.5-12.4
Education
< High School 392 222 90.1 87.1-92.5 170 9.9 7.5-12.9
High School 578 311 86.7 83.4-89.4 267 13.3 10.6-16.6
> High School 775 486 90.7 88.6-92.5 289 9.3 7.5-11.4
Marital Status
Married 1153 709 90.2 88.4-91.7 444 9.8 8.3-11.6
Other 593 310 87.5 84.6-90.0 283 12.5 10.0-15.4
Income
15,999 or less 502 282 89.7 86.9-91.9 220 10.3 8.1-13.1
16,000-24,999 275 160 90.5 86.6-93.3 115 9.5 6.7-13.4
25,000-39,999 266 151 86.4 81.2-90.4 115 13.6 9.6-18.8
40,000 or more 536 329 89.9 87.1-92.1 207 10.1 7.9-12.9
WIC recipient
No 917 536 88.3 86.0-90.3 381 11.7 9.7-14.0
Yes 814 473 90.4 88.4-92.1 341 9.6 7.9-11.6
Medicaid recipient
No 871 539 90.6 88.5-92.3 332 9.4 7.7-11.5
Yes 875 480 88.0 85.7-90.0 395 12.0 10.0-14.3
Infant's birth weight
Under 1500 grams 318 5 1.4 0.6- 3.4 313 98.6 96.6-99.4
1500-2499 grams 536 171 32.7 28.7-36.8 365 67.3 63.2-71.3
2500+ grams 887 841 94.8 93.1-96.1 46 5.2 3.9- 6.9

*Survey Question:
Data in this table are constructed from survey question 34 and 35.

Percents based on fewer than 50 total respondents may not be reliable.
Interpret these percentages with caution. C.I. = confidence interval.