Skip to main content
. 2020 Jan 20;20:50. doi: 10.1186/s12913-020-4904-5

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)