No vaccination |
Working mothers with a 1st child | 75 | | |
% of mothers with a 1st child having diarrhoea 1st year | 20% | 75×20%=15 | |
Average duration (days) for being absent for diarrhoea in a child | 5 | 15×5=75 | |
Average number of days absent/woman | | 75/75=1 | 1 |
Vaccination |
Working mothers with a 1st child | 75 | | |
% of mothers with a vaccinated child | 85% | 75×85%=64 | |
% of mothers with no vaccinated child | (1–85%)=15% | 75×15%=11 | |
Vaccine efficacy against diarrhoea | 85% | | |
% of mothers with a vaccinated child still having diarrhoea | 20%×(100%–85%)=3% | 64×3%=2 | |
% of mothers with an unvaccinated child still having diarrhoea (Rest) | 20% | 11×20%=2 | |
Average duration (days) for being absent for diarrhoea in a child | 5 | 4×5=20 | |
Average number of days absent/woman | | 20/75=0.27 | 0.27 |
Gain in working days avoided/woman after vaccination 1st year | | | (1–0.27)=0.73 |
Sensitivity analysis |
Proportion of children with diarrhoea is lower because of the vaccine's herd effect in the Rest group | 10% instead 20% | 11×10%=1 | |
Average duration (days) for being absent for diarrhoea in a child | | 3×5=15 | |
Average number of days absent/woman | | 15/75=0.20 | 0.20 |
Gain in working days avoided/woman after vaccination 1st year | | | (1–0.20)=0.80 |