Table 3: Validity of the interview results

 

Children of unsure parents are assumed  to haven’t been vaccinated

(Sensitivity 87% and specificity 79%)

Children of unsure parents are assumed to have been vaccinated

(Sensitivity 95% and specificity 70%)

status

Effectively  vaccinated

Not effectively vaccinated

Effectively vaccinated

Not effectively vaccinated

Vaccinated with history (n=226)

226-155=71

 

226*0.87*0.79= 155

 

226*0.95*0.70=150

226-150=76

Vaccinated with card (n=549)

549

0

549

0

Effectively vaccinated

71+549= 620

155

150+549 = 699

76

Estimated vaccination coverage(EVC)

620/853*100= 72.7%

155/853*100=18.2%

699/853*100 = 81.94%

76/853*100 = 8.9%