Table 2 Predictive accuracy of the Estimated Date of Delivery (EDD) for the Actual Date of Delivery (ADD) for 7 and 14Â day windows
|  | Using LMP alone n = 325 | Using EUS alone (< 24 weeks) n = 325 | Using EUS alone (< 14 weeks) n = 82 | Using EUS alone (14 – 24 weeks) n = 243 | Using the Smartphone App n = 325 |
|---|---|---|---|---|---|
EDD within 7 days of ADD N (%) (95%CI) | 134 (41.2) (36.0–46.7) | 193 (59.4) (53.9–64.6) | 41 (50) (38.8–61.3) | 152 (62.6) (56.1–68.7) | 185 (56.9) |
EDD within 14 days of ADD N (%) (95%CI) | 207 (63.7) (60.9–71.1) | 287 (88.3) (84.4–91.4) | 69 (84.2) (74.4–91.3) | 218 (89.7) (85.2–93.2) | 279 (85.9) (81.6–89.2) |