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| D & C History | ET (1st measurement), Mean ± SD | Significant | ET (2nd measurement), Mean ± SD | Significanta | |
|---|---|---|---|---|---|
| With D & C history, No. (%) | 9.33 ± 1.02 | 0.000a | 8.98 ± 1.28 | 0.000 | |
| 1 | 92 (20.70) | ||||
| 2 | 20 (4.50) | ||||
| 3 | 16 (3.60) | ||||
| 4 | 4 (0.90) | ||||
| Total | 132 (20.70) | ||||
| Without D & C history, No. (%) | 312 (70.30) | 10.00 ± 0.58 | 10.62 ± 0.68 | ||
aSig at P < 0.01
