Introduction: Oligohydramnios is an important sign of fetal jeopardy and amniotic
fluid index (AFI) and single deepest vertical pocket (SDVP) have been used to
detect it. Objective: To compare AFI vs. SDVP at term as a predictor of
adverse perinatal outcomes. Methods: A prospective observational study
was conducted in Teaching Hospital Kandy, Sri Lanka for eight months from July 2015 to March 2016. 448 Singleton pregnancies
admitted after 37 completed weeks were included. AFI ≤ 5 cm and SDVP < 2 cm
were the exposure variables, which were related to outcome
variables. Results: Mean AFI was 11.35 cm (SD = 5.15) and Mean SDVP was
4.07 cm (SD = 1.88). AFI and SDVP values showed a significant positive
correlation (r = 0.954; p < 0.001). A significant percentage with low AFI
needed induction of labour (RR 2.14, 95% CI 1.85 - 2.49). Low AFI was also a
significant risk factor for not having an uneventful birth outcome (RR 2.682,
95% CI 1.082 - 6.642). Low SDVP was a significant risk factor for induction of
labour (RR 1.83, 95% CI 1.434 - 2.334), operative delivery (RR 1.714, 95% CI
1.292 - 2.280), meconium-stained liquor (RR 2.67, 95% CI 1.342 - 5.308), and
Apgar < 7 (RR 17.74, 95% CI 7.96 - 40.924). SDVP had better predictability
than AFI for adverse perinatal outcomes. Conclusion: AFI better
predicted oligohydramnios and
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