TABLE 2. Logistic regression for preterm delivery within 7 days of amniocentesis.
Explanatory variable | Odds ratio | 95% CI | P value |
---|---|---|---|
Gestational age at diagnosis of short cervix, wks | 0.46 | 0.16–1.37 | .16 |
Cervical length, mm | 0.29 | 0.02–3.8 | .34 |
Amniotic fluid MMP-8 concentration >23 ng/mL | 55.4 | 1.1–2807 | .045 |
CI, confidence interval.