Characteristics of included infants born between 2014 and 2018 in the Farafenni Health and Demographics Surveillance System and their association with mortality in each of the three periods considered (neonatal, ≤28 days; postneonatal, 28–365 days and first year, 0–365 days)
| Died in ≤28 days | Died in >28–365 days | Died in 0–365 days | Alive at 365 days | Total | |
| Subjects | 64/7131 (0.90%) | 62/7152 (0.87%) | 126/7365 (1.71%) | 7239/7365 (98.29%) | 7365 |
| Infant characteristics | |||||
| Sex | p=0.739 | p=0.251 | p=0.287 | ||
| Male | 32 (50.79%) | 28 (45.16%) | 60 (48%) | 3801 (52.92%) | 3861 (52.83%) |
| Female | 31 (49.21%) | 34 (54.84%) | 65 (52%) | 3382 (47.08%) | 3447 (47.17%) |
| Missing | 1 | 0 | 1 | 56 | 57 |
| Year of birth | p=0.719 | p=0.535 | p=0.880 | ||
| 2014 | 19 (29.69%) | 17 (27.42%) | 36 (28.57%) | 1938 (26.77%) | 1974 (26.8%) |
| 2015 | 16 (25.00%) | 21 (33.87%) | 37 (29.37%) | 1809 (24.99%) | 1846 (25.06%) |
| 2016 | 15 (23.44%) | 13 (20.97%) | 28 (22.22%) | 1716 (23.7%) | 1744 (23.68%) |
| 2017 | 14 (21.88%) | 11 (17.74%) | 25 (19.84%) | 1776 (24.53%) | 1801 (24.45%) |
| Ethnic group* | p=NA | p=0.642 | p=0.755 | ||
| Wollof | 29 (45.31%) | 32 (51.61%) | 61 (48.41%) | 3333 (46.07%) | 3394 (46.11%) |
| Mandinka | 19 (29.69%) | 11 (17.74%) | 30 (23.81%) | 1852 (25.6%) | 1882 (25.57%) |
| Fula | 16 (25%) | 16 (25.81%) | 32 (25.4%) | 1731 (23.93%) | 1763 (23.95%) |
| Other | 0 (0%) | 3 (4.84%) | 3 (2.38%) | 318 (4.4%) | 321 (4.36%) |
| Missing | 0 | 0 | 0 | 5 | 5 |
| BCG vaccination in first week† | p=NA | p=0.569 | p=0.058‡ | ||
| Yes | 0 (0%) | 3 (4.84%) | 3 (2.38%) | 522 (7.21%) | 525 (7.13%) |
| No | 64 (100%) | 59 (95.16%) | 123 (97.62%) | 6717 (92.79%) | 6840 (92.87%) |
Row percentages do not add up to 100% because the sample size is slightly different for each group. P values are for the univariable analysis (Cox regression) of each risk factor on mortality in each time period (values<0.05 are bolded).
*Ethnicity was self-reported.
†Proxy for health-seeking behaviour.
‡This variable was included in the multivariable model, as p<0.20.