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 | 1165 (28%) | 969 (23%) | 1738 (41%) | 353 (8%) | ||
| 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%) | |
*Calculated using a chi-squared test statistic excluding the missing values included (if applicable)