Table 2 Demographic characteristics by difference in delivery dates category (N = 4225)
Variable | Overall | Severe overestimate 36 days or more after ADD | Moderate overestimate 15 days to 35 days after ADD | Accurate 6 days before to 14 days after ADD | Underestimate 7 days or more before ADD | p-value* |
|---|---|---|---|---|---|---|
Overall | Â | 1165 (28%) | 969 (23%) | 1738 (41%) | 353 (8%) | Â |
Age | ||||||
 10–20 | 616 (15%) | 182 (16%) | 147 (15%) | 227 (13%) | 60 (17%) | 0.052 |
 21–30 | 2409 (57%) | 672 (58%) | 532 (55%) | 1008 (58%) | 197 (56%) | |
 31–40 | 1092 (26%) | 283 (24%) | 272 (28%) | 446 (26%) | 91 (26%) | |
 41+ | 108 (3%) | 28 (2%) | 18 (2%) | 57 (3%) | 5 (1%) | |
Parity | ||||||
 0 | 1058 (25%) | 277 (24%) | 247 (24%) | 437 (25%) | 97 (27%) | 0.133 |
 1 | 840 (20%) | 221 (19%) | 210 (22%) | 334 (19%) | 75 (21%) | |
 2–4 | 1658 (39%) | 456 (39%) | 356 (37%) | 711 (41%) | 135 (38%) | |
 5+ | 667 (16%) | 209 (18%) | 156 (16%) | 256 (15%) | 46 (13%) | |
Missing | 2 (< 1%) | 2 (< 1%) | 0 (0%) | 0 (0%) | 0 (0%) | |
District | ||||||
 North A | 1012 (24%) | 309 (27%) | 229 (24%) | 384 (22%) | 90 (26%) | < 0.001 |
 North B | 1425 (34%) | 473 (41%) | 360 (37%) | 511 (29%) | 81 (23%) | |
 Central | 699 (17%) | 163 (14%) | 153 (16%) | 298 (17%) | 85 (24%) | |
 West | 836 (20%) | 167 (14%) | 181 (19%) | 416 (24%) | 72 (20%) | |
 South | 248 (6%) | 48 (4%) | 46 (5%) | 129 (7%) | 25 (7%) | |
 Missing | 5 (1%) | 5 (1%) | 0 (0%) | 0 (0%) | 0 (0%) | |
HIV status | ||||||
 Negative | 4056 (96%) | 1095 (94%) | 941 (97%) | 1676 (96%) | 344 (97%) | < 0.001 |
 Positive | 89 (2%) | 24 (2%) | 18 (2%) | 36 (2%) | 9 (2%) | |
 Unknown | 80 (2%) | 46 (4%) | 10 (1%) | 24 (1%) | 0 (0%) | |
Past home delivery | ||||||
 No | 2367 (56%) | 627 (54%) | 549 (57%) | 997 (57%) | 194 (55%) | 0.030 |
 Yes | 778 (18%) | 255 (22%) | 167 (17%) | 295 (17%) | 61 (17%) | |
 No past delivery | 1058 (25%) | 277 (24%) | 247 (25%) | 437 (25%) | 97 (27%) | |
 Missing | 22 (1%) | 6 (1%) | 6 (1%) | 9 (1%) | 1 (< 1%) | |
Risk category | ||||||
 Low | 2094 (50%) | 592 (51%) | 469 (48%) | 863 (50%) | 170 (48%) | 0.922 |
 Medium | 1355 (32%) | 359 (31%) | 319 (33%) | 562 (32%) | 115 (33%) | |
 High | 774 (18%) | 212 (18%) | 181 (19%) | 313 (18%) | 68 (19%) | |
 Missing | 2 (< 1%) | 2 (< 1%) | 0 (0%) | 0 (0%) | 0 (0%) | |