Table 4 Crown-rump length (CRL) measurements in relation to gestational age for the original equation fit reported by Verburg compared to model fit of the simulated data (Approach 3)
Verburg’s original equation | Approach 3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Estimated GA (weeks) | Estimated GA (weeks) | Difference (days) | |||||||
CRL (mm) | 3rdcentile | Median | 97thcentile | 3rdcentile | Median | 97thcentiles | 3rdcentile | Median | 97thcentile |
10 | 6.88 | 7.50 | 8.18 | 6.97 | 7.29 | 8.15 | -0.60 | 1.49 | 0.23 |
15 | 7.63 | 8.31 | 9.06 | 7.66 | 8.17 | 9.08 | -0.26 | 1.00 | -0.14 |
20 | 8.22 | 8.96 | 9.77 | 8.23 | 8.85 | 9.81 | -0.10 | 0.79 | -0.25 |
25 | 8.73 | 9.52 | 10.38 | 8.73 | 9.42 | 10.42 | -0.02 | 0.68 | -0.29 |
30 | 9.19 | 10.02 | 10.92 | 9.19 | 9.93 | 10.96 | 0.00 | 0.62 | -0.29 |
35 | 9.60 | 10.47 | 11.41 | 9.60 | 10.39 | 11.45 | 0.00 | 0.57 | -0.28 |
40 | 9.99 | 10.89 | 11.87 | 9.99 | 10.81 | 11.91 | -0.02 | 0.54 | -0.26 |
45 | 10.36 | 11.29 | 12.31 | 10.36 | 11.22 | 12.34 | -0.05 | 0.52 | -0.24 |
50 | 10.70 | 11.67 | 12.72 | 10.72 | 11.60 | 12.75 | -0.08 | 0.50 | -0.22 |
55 | 11.04 | 12.03 | 13.12 | 11.05 | 11.96 | 13.15 | -0.11 | 0.48 | -0.20 |
60 | 11.36 | 12.39 | 13.50 | 11.38 | 12.32 | 13.53 | -0.14 | 0.47 | -0.18 |
65 | 11.67 | 12.73 | 13.87 | 11.70 | 12.66 | 13.90 | -0.16 | 0.47 | -0.15 |
70 | 11.98 | 13.06 | 14.24 | 12.01 | 12.99 | 14.25 | -0.17 | 0.47 | -0.12 |
75 | 12.28 | 13.39 | 14.59 | 12.30 | 13.32 | 14.61 | -0.18 | 0.47 | -0.09 |
80 | 12.57 | 13.71 | 14.94 | 12.60 | 13.64 | 14.95 | -0.18 | 0.48 | -0.05 |
85 | 12.86 | 14.02 | 15.28 | 12.88 | 13.95 | 15.29 | -0.16 | 0.49 | -0.01 |
90 | 13.15 | 14.33 | 15.62 | 13.17 | 14.26 | 15.62 | -0.14 | 0.52 | 0.04 |
95 | 13.43 | 14.64 | 15.96 | 13.44 | 14.56 | 15.94 | -0.11 | 0.55 | 0.10 |
100 | 13.71 | 14.94 | 16.29 | 13.72 | 14.86 | 16.27 | -0.06 | 0.58 | 0.16 |