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Bland–Altman pairwise comparisons for gestational length based on the four methods of assigning gestational age in ascending order from smallest limit of agreement
| GA comparison | Mean/bias | 95 % limit of agreement |
|---|---|---|
| Ovulation–implantation | 1.17 | (−1.95, 4.29) |
| CRL–implantation | −0.24 | (−3.98, 3.51) |
| Ovulation–CRL | −1.40 | (−5.76, 2.95) |
| Ovulation–LMP | −2.12 | (−10.54, 6.30) |
| LMP–implantation | −0.95 | (−9.50, 7.60) |
| LMP–CRL | 0.71 | (−7.91, 9.34) |
