Key result
Protracted labor (dilation <1 cm/hr) occurred in 14.3% of shoulder dystocia cases versus 13.5% of matched controls, indicating it is not a reliable predictor of shoulder dystocia.
Why the study?
Can shoulder dystocia be deduced from protracted labor on the labor partogram?
Population
104 parturient women
Comparison
Presence of shoulder dystocia vs Matched controls without shoulder dystocia
Design
Case-control
Authors
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Protracted labor should not inform shoulder dystocia risk assessment; this Level 4 finding leaves open identification of reliable predictors.
Case-Control (n=104)
Can shoulder dystocia be deduced from protracted labor on the labor partogram?
Absolute Event Rate: 14.3% vs 13.5%
p-value: p=not statistically significant
Protracted labor does not appear to be a reliable risk factor or predictor for shoulder dystocia.
Lurie et al. (1995) conducted a case-control in Shoulder dystocia (n=104). Protracted labor vs. Normal labor progression was evaluated on Protracted dilation rate of less than 1 cm/hr (p=not statistically significant). Protracted labor (dilation <1 cm/hr) occurred in 14.3% of shoulder dystocia cases versus 13.5% of matched controls, indicating it is not a reliable predictor of shoulder dystocia.
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