Why the study?
Because moderate variability and accelerations are physiologically similar and equally indicative of a non-acidemic fetus, the authors evaluated whether interpreting NSTs based on variability rather than accelerations produces similar results.
Does interpreting non-stress tests based on moderate variability predict fetal well-being in singleton fetuses at increased risk of fetal demise?
Population
22,619 patients with singleton fetuses at increased risk of fetal demise (76,232 NSTs)
Comparison
Interpreting non-stress tests based on variability rather than accelerations
Design
Retrospective cohort study
Authors
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May support reduced follow-up after non-reactive non-stress tests with moderate variability; hypothesis-generating for prospective validation of variability-based criteria.
Does interpreting non-stress tests based on moderate variability predict fetal well-being in singleton fetuses at increased risk of fetal demise?
In non-anomalous fetuses, moderate variability in an otherwise non-reactive non-stress test is highly predictive of fetal well-being, suggesting additional follow-up testing may be unnecessary.
Johnson et al. (2026) studied this question.
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