Table 3 Cross-tabulation of categorized EDD-ADD differences for LMP and EUS (cell frequencies and percentages)
LMP | EUS | |||||
|---|---|---|---|---|---|---|
 ≤ -15 days | -14 to -8 days | -7 to 7 days | 8 to 14 days |  ≥ 15 days | TOTAL | |
 ≤ -15 days | 3 0.92 | 10 3.08 | 23 7.08 | 3 0.92 | 1 0.31 | 40 12.31 |
-14 to -8Â days | 1 0.31 | 6 1.85 | 15 4.62 | 1 0.31 | 2 0.62 | 25 7.69 |
-7 to 7Â days | 2 0.62 | 5 1.54 | 104 32.00 | 21 6.46 | 2 0.62 | 134 41.23 |
8 to 14Â days | 0 0.00 | 1 0.31 | 23 7.08 | 14 4.31 | 10 3.08 | 48 14.77 |
 ≥ 15 days | 1 0.31 | 1 0.31 | 28 8.62 | 24 7.38 | 24 7.38 | 78 24.00 |
TOTAL | 7 2.15 | 23 7.08 | 193 59.38 | 63 19.38 | 39 12.00 | 325 100.00 |