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Infant Gestation Duration*

1997 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 818 474 89.3 86.8-91.3 344 10.7 8.7-13.2
Age
< 20 years 122 69 83.2 72.7-90.2 53 16.8 9.8-27.3
20-24 years 214 112 87.3 81.7-91.3 102 12.7 8.7-18.3
25-34 years 390 242 93.0 90.7-94.7 148 7.0 5.3- 9.3
35+ years 92 51 88.4 79.9-93.6 41 11.6 6.4-20.1
Mother's Race
White 560 338 89.9 87.0-92.2 222 10.1 7.8-13.0
African American 235 119 86.7 80.9-91.0 116 13.3 9.0-19.1
Other Minorities 23 17 97.3 92.8-99.0 6 2.7 1.0- 7.2
Hispanic origin
Yes 18 8 89.9 75.4-96.2 10 10.1 3.8-24.6
No 800 466 89.3 86.8-91.3 334 10.7 8.7-13.2
Education
< High School 158 82 85.3 76.9-90.9 76 14.7 9.1-23.1
High School 279 148 87.7 83.0-91.2 131 12.3 8.8-17.0
> High School 381 244 92.3 89.5-94.4 137 7.7 5.6-10.5
Marital Status
Married 554 336 90.6 87.8-92.7 218 9.4 7.3-12.2
Other 264 138 86.7 81.1-90.8 126 13.3 9.2-18.9
Income
15,999 or less 250 123 82.3 75.7-87.5 127 17.7 12.5-24.3
16,000-24,999 129 63 90.5 85.2-94.0 66 9.5 6.0-14.8
25,000-39,999 136 93 93.2 87.8-96.3 43 6.8 3.7-12.2
40,000 or more 256 168 93.3 90.2-95.5 88 6.7 4.5- 9.8
WIC recipient
No 449 273 90.7 87.5-93.1 176 9.3 6.9-12.5
Yes 363 197 87.7 83.4-91.0 166 12.3 9.0-16.6
Medicaid recipient
No 426 277 92.9 90.5-94.7 149 7.1 5.3- 9.5
Yes 392 197 85.1 80.3-88.9 195 14.9 11.1-19.7
Infant's birth weight
Under 1500 grams 160 0 0.0 - 160 100 -
1500-2499 grams 258 96 37.6 31.8-43.8 162 62.4 56.2-68.2
2500+ grams 398 376 94.3 91.4-96.3 22 5.7 3.7- 8.6

*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.