The formal test for duration × Hb-tertile interaction approached but did not reach statistical significance (likelihood-ratio χ 2 = 5.20, df = 2, p = 0.074), suggesting a borderline trend toward effect modification rather than a definitive interaction. 4.
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Prediction of Postpartum Haemorrhage After Labour Induction: An Internally Validated 10-Hour Risk-Stratification Threshold
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0.0740
0.0740