What question did this study set out to answer?

To evaluate and compare log-linear and linear-reciprocal mathematical models for adjusting maternal serum marker multiples of median (MoM) by maternal weight in Down syndrome screening.

April 7, 2006Journal of Clinical PathologyOpen Access

Weight correction of MoM values: which method?

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Authors

TRTim ReynoldsCalifornia Institute of Technology GVG. VrankenUniversity of Namur JNJ M Van NuetenZiekenhuis Oost-Limburg

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Implication

Cohort study reveals log-linear weight correction outperforms linear-reciprocal models for serum markers in pregnant women, suggesting minimal impact on overall Down syndrome risk assessment.

Key Points

To evaluate and compare log-linear and linear-reciprocal mathematical models for adjusting maternal serum marker multiples of median (MoM) by maternal weight in Down syndrome screening.
Analyzed maternal serum markers (AFP, HCG, and uE3) measured with Beckman Coulter access reagents alongside maternal weight in a cohort of 752 Belgian pregnant women.
Modeled marker relationships to weight using log-linear and linear-reciprocal equations and quantified differences in simulated MoM values and Down syndrome risk estimates.
The log-linear model demonstrated higher coefficients of determination (r²) across all log10 MoM markers compared to the linear-reciprocal approach.
Mean differences in weight-corrected MoM between models were 7.8% (SD 4.3%) for AFP, 14.0% (SD 4.4%) for HCG, and 5.9% (SD 3.2%) for uE3 (p < 0.0001, Wilcoxon's paired sample test).
Model variations yielded a 1.66% to 5.34% difference in Down syndrome risk estimates in women of median weight (65.5 kg), representing a statistically non-significant change in overall clinical risk.

Cite This Study

Reynolds et al. (2006) studied this question.

synapsesocial.com/papers/6a98020c827cb52371a684fe https://doi.org/10.1136/jcp.2005.034280

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Implication

Cohort study reveals log-linear weight correction outperforms linear-reciprocal models for serum markers in pregnant women, suggesting minimal impact on overall Down syndrome risk assessment.

Weight correction of MoM values: which method?

Discussion

Member takes

Implication

Key Points

Cite This Study

Weight correction of MoM values: which method?

Discussion

Member takes

Implication

Key Points

Cite This Study

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