Agreement between algorithmic gestational age estimations compared to ultrasound-assigned gestational age.

(A) Legend, and overall MAE (95% CI) for heel prick sample and cord blood samples from Zambia and Bangladesh across three models. Dot size in plots is proportional to sample size in each gestational age category. Performance of each model by ultrasound-validated gestational age when applied to heel prick data in (B) Zambia (C) Bangladesh, and cord blood data in (D) Zambia (E) Bangladesh. MAE, mean absolute error (average absolute deviation of observed vs. predicted gestational age in weeks).