Table 3.
Chorioamnionitis rate per 100 singleton births by race/ethnicity at term gestation in KPSC Hospitals, 1995–2010.
| Chorioamnionitis rate at preterm (<37 wks) and term (37–42 wks) gestations | ||||||||
|---|---|---|---|---|---|---|---|---|
| Period | White | Black | Hispanic | Asian/PI | ||||
| <37 wks | 37–42 wks | <37 wks | 37–42 wks | <37 wks | 37–42 wks | <37 wks | 37–42 wks | |
| 1995-96 | 5.02 | 1.87 | 7.29 | 2.29 | 5.93 | 2.54 | 5.87 | 3.84 |
| 1997-98 | 5.18 | 2.12 | 7.36 | 2.43 | 6.11 | 2.84 | 6.07 | 4.41 |
| 1999-00 | 5.38 | 2.39 | 7.68 | 2.60 | 6.36 | 3.12 | 6.68 | 5.02 |
| 2001-02 | 5.47 | 2.66 | 7.87 | 2.78 | 6.62 | 3.49 | 6.81 | 5.75 |
| 2003-04 | 5.74 | 3.11 | 8.35 | 2.98 | 7.13 | 4.09 | 7.21 | 6.58 |
| 2005-06 | 6.21 | 3.48 | 8.83 | 3.21 | 7.50 | 4.57 | 7.70 | 7.30 |
| 2007-08 | 5.99 | 3.89 | 8.88 | 3.55 | 7.53 | 5.08 | 7.74 | 8.22 |
| 2009-10 | 6.00 | 4.45 | 8.90 | 3.69 | 7.73 | 5.98 | 8.39 | 9.41 |
|
| ||||||||
| P for trend | <.001 | <.001 | .049 | <.001 | <.001 | <.001 | <.001 | <.001 |
|
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| Relative increase % (95% CI), 2009-10 versus 1995-96 | 21 (9, 78) | 138 (108, 173) | 24 (9, 81) | 62 (30, 101) | 31 (3, 66) | 135 (114, 159) | 44 (9, 127) | 145 (109, 188) |
Rates are expressed in percent; Adjustments were made for maternal age, education, median household income, parity, prenatal care, and smoking during pregnancy; Asian/PI: Asian and Pacific Islanders; CI: confidence interval.