Number of Pregnancies Affected by Intraamniotic Infection in Both Early and Moderately/Late Preterm Gestations
| Variable . | Early Preterm Birth . | Moderately Preterm or Late-Preterm Birth . |
|---|---|---|
| Prevalence in the preterm population, %a | 15.6 | 84.4 |
| Pregnancies, no.b | 2.3 million | 12.7 million |
| Rate of UGT infection, %c | 30 | 10.4 |
| Births potentially affected by infection, no.d | 702 000 | 1.3 million |
| Variable . | Early Preterm Birth . | Moderately Preterm or Late-Preterm Birth . |
|---|---|---|
| Prevalence in the preterm population, %a | 15.6 | 84.4 |
| Pregnancies, no.b | 2.3 million | 12.7 million |
| Rate of UGT infection, %c | 30 | 10.4 |
| Births potentially affected by infection, no.d | 702 000 | 1.3 million |
Early preterm birth was defined as birth at <31 weeks of gestation, and moderately preterm and late-preterm birth was defined as delivery at 32–36 weeks of gestation.
a Data are from the study by Li et al [45].
b Estimated by multiplying the total number preterm infants delivered (15 million annually [1]) by the total prevalence of early preterm birth and of moderately preterm or late-preterm birth.
c The rate among early preterm births is quoted in the article by Howson et al [2], while the rate among moderately preterm or late-preterm birth is identified in the present study.
d Calculated on the basis of the proportion of intraamniotic infections among early preterm births or moderately preterm and late-preterm births.
Number of Pregnancies Affected by Intraamniotic Infection in Both Early and Moderately/Late Preterm Gestations
| Variable . | Early Preterm Birth . | Moderately Preterm or Late-Preterm Birth . |
|---|---|---|
| Prevalence in the preterm population, %a | 15.6 | 84.4 |
| Pregnancies, no.b | 2.3 million | 12.7 million |
| Rate of UGT infection, %c | 30 | 10.4 |
| Births potentially affected by infection, no.d | 702 000 | 1.3 million |
| Variable . | Early Preterm Birth . | Moderately Preterm or Late-Preterm Birth . |
|---|---|---|
| Prevalence in the preterm population, %a | 15.6 | 84.4 |
| Pregnancies, no.b | 2.3 million | 12.7 million |
| Rate of UGT infection, %c | 30 | 10.4 |
| Births potentially affected by infection, no.d | 702 000 | 1.3 million |
Early preterm birth was defined as birth at <31 weeks of gestation, and moderately preterm and late-preterm birth was defined as delivery at 32–36 weeks of gestation.
a Data are from the study by Li et al [45].
b Estimated by multiplying the total number preterm infants delivered (15 million annually [1]) by the total prevalence of early preterm birth and of moderately preterm or late-preterm birth.
c The rate among early preterm births is quoted in the article by Howson et al [2], while the rate among moderately preterm or late-preterm birth is identified in the present study.
d Calculated on the basis of the proportion of intraamniotic infections among early preterm births or moderately preterm and late-preterm births.
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