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Estimated D and D′ for the MTHFR Gene
| D (Mean ± SD)a | D′ (Mean ± SD)a | |
| One-subject pool | −.062 | −1.000 |
| Two-subject pool | −.049 (−.041 ± .024) | −.790 (−.678 ± .370) |
| Four-subject pool | −.061 (−.029 ± .036) | −.997 (−.509 ± .513) |
D or D′ value is based on a single estimation. Mean and SD are based on different random samplings.
