Background factors for DTP vaccinated and DTP unvaccinated children
| DTP unvaccinated | DTP vaccinated | ||
|---|---|---|---|
| Variable | N=618 | N=1212 | RR for vaccinated compared with unvaccinated (95% CI) |
| Mother's age: 13–19 years | 33% (198/603) | 27% (320/1190) | 0.82 (0.71 to 0.95) |
| Living with father of child | 63% (388/612) | 59% (716/1209) | 0.93 (0.87 to 1.01) |
| Mother's ethnic group: Pepel, Manjaco or Mancanha | 26% (159/613) | 32% (384/1207) | 1.23 (1.05 to 1.44) |
| Mother's schooling: none | 44% (270/616) | 31% (390/1210) | 0.74 (0.65 to 0.83) |
| Mother died | 0.5% (3/618) | 0.3% (4/1212) | 0.86 (0.45 to 1.64) |
| From BHP study area | 17% (104/618) | 37% (443/1212) | 1.35 (1.27 to 1.44) |
| Child is firstborn | 43% (268/618) | 46% (554/1212) | 1.05 (0.95 to 1.18) |
| Boys | 42% (258/618) | 44% (539/1212) | 1.04 (0.97 to 1.11) |
| Twins | 27% (168/618) | 19% (235/1212) | 0.85 (0.78 to 0.93) |
| Not breastfeeding at 2-month visit* | 2% (14/618) | 2% (28/1211) | 0.99 (0.80 to 1.23) |
| Consultations before visit | 43% (263/616) | 43% (516/1201) | 1.00 (0.94 to 1.07) |
| Received BCG vaccine before 2-month visit | 68% (420/618) | 86% (1048/1212) | 1.58 (1.40 to 1.77) |
| Randomised to BCG at birth | 50% (308/618) | 52% (627/1212) | 1.03 (0.96 to 1.10) |
| Randomised to vitamin A at birth | 51% (244/481) | 49% (439/895) | 0.98 (0.90 to 1.06) |
| Positive tuberculin skin test reaction | 9% (54/576) | 11% (121/1146) | 1.04 (0.94 to 1.16) |
↵* If a child was not breastfed at 2 months of age it usually meant that the mother had died or was HIV infected.
BCG, Bacille Calmette-Guerin; BHP, The Bandim Health Project; DTP, diphtheria-tetanus-pertussis.
The values in parentheses in the second and third columns denote factor/observed.