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Previous Premature Birth*

1999 North Carolina Pregnancy Risk Assessment Monitoring System Survey Results
  No Yes
Demographic Groups Total Respondents N % 95% C.I. N % 95% C.I.
Total 864 692 89.5 86.7-91.7 172 10.5 8.3-13.3
Age
< 20 years 51 38 85.6 66.1-94.7 13 14.4 5.3-33.9
20-24 years 219 166 87.8 81.7-92.0 53 12.2 8.0-18.3
25-34 years 462 377 89.2 85.3-92.2 85 10.8 7.8-14.7
35+ years 132 111 94.2 88.0-97.3 21 5.8 2.7-12.0
Mother's Race
White 540 451 90.7 87.4-93.1 89 9.3 6.9-12.6
African American 293 218 86.2 80.2-90.7 75 13.8 9.3-19.8
Other Minorities 31 23 90.5 73.0-97.1 8 9.5 2.9-27.0
Hispanic origin
Yes 57 53 99.2 97.4-99.7 4 0.8 0.3- 2.6
No 807 639 88.5 85.6-90.9 168 11.5 9.1-14.4
Education
< High School 191 149 90.6 84.5-94.5 42 9.4 5.5-15.5
High School 328 254 87.8 82.7-91.5 74 12.2 8.5-17.3
> High School 345 289 90.3 86.1-93.4 56 9.7 6.6-13.9
Marital Status
Married 588 492 90.6 87.4-93.0 96 9.4 7.0-12.6
Other 276 200 86.4 80.5-90.8 76 13.6 9.2-19.5
Income
15,999 or less 286 214 87.4 81.7-91.4 72 12.6 8.6-18.3
16,000-24,999 135 107 90.1 82.3-94.7 28 9.9 5.3-17.7
25,000-39,999 141 112 89.0 81.4-93.7 29 11.0 6.3-18.6
40,000 or more 224 194 91.0 85.7-94.5 30 9.0 5.5-14.3
WIC recipient
No 436 357 90.2 86.4-93.0 79 9.8 7.0-13.6
Yes 420 328 88.4 84.1-91.7 92 11.6 8.3-15.9
Medicaid recipient
No 399 338 91.2 87.4-93.9 61 8.8 6.1-12.6
Yes 465 354 87.5 83.3-90.8 111 12.5 9.2-16.7
Infant's birth weight
Under 1500 grams 147 100 68.7 60.6-75.8 47 31.3 24.2-39.4
1500-2499 grams 261 177 67.8 61.8-73.2 84 32.2 26.8-38.2
2500+ grams 454 414 91.2 88.3-93.5 40 8.8 6.5-11.7

*Survey Question:
3. Was the baby just before your new one born more than 3 weeks before its due date?

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