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Comparison of differences of D1–2 surfaces and D3–4 surfaces observed during the first visit and second visit between non-pregnant and pregnant group
| Non-pregnant 1st–2nd visit | Pregnant 1st–2nd visit | p valuesa | |
|---|---|---|---|
| D1–2 | –0.08 ± 0.28 | 0.48 ± 0.98 | 0.012 |
| D3–4 | 0.36 ± 0.81 | –0.56 ± 1.01 | 0.001 |
Results expressed in mean ± SD. P values were calculated using a Mann–Whitney U test.
