Table 1 Gestational age estimation.
Sweeps collected by sonographers | Sweeps collected by novices | |||
|---|---|---|---|---|
Standard ultrasound device | Low-cost handheld device | Standard ultrasound device | Low-cost handheld device | |
Number | 406 | 104 | 112 | 56 |
Blind-sweep MAE ± sd (days) | 3.8 ± 3.6 | 3.3 ± 2.8 | 4.4 ± 3.5 | 5.0 ± 4.0 |
Standard fetal biometry estimates MAE ± sd (days) | 5.2 ± 4.6 | 3.8 ± 3.6 | 4.8 ± 3.7 | 4.7 ± 4.0 |
Blind sweep—standard fetal biometry mean difference ± sd (days) | −1.4 ± 4.5 | −0.6 ± 3.8 | −0.4 ± 4.8 | 0.4 ± 5.1 |
MAE difference 95% CI (days) | −1.8, −0.9 | −1.3, 0.1 | −1.3, 0.5 | −1.0, 1.7 |
Blind sweep ME ± sd (days) | −0.9 ± 5.3 | 0.4 ± 4.4 | −1.5 ± 5.5 | −3.8 ± 5.4 |
Standard fetal biometry estimates ME ± sd (days) | −1.4 ± 7.0 | −0.25 ± 5.4 | −2.6 ± 5.3 | −3.4 ± 5.2 |
Reduced blind-sweep protocol MAE ± sd (days) | 4.0 ± 3.7 | 3.5 ± 3.0 | 4.5 ± 3.5 | 5.1 ± 4.2 |
