An electronic questionnaire was developed using the Open Data Kit Collect application. 
Open Data Kit Collect
[Factors associated with co-administration of birth dose vaccines in senegalese children]. INTRODUCTION
 Co-administration of the bili&#233; de Calmette et Gu&#233;rin (BCG) and birth doses of oral polio (OPV zero) and hepatitis&#160;B (HepB BD) vaccines is strongly recommended.  The objective was to determine the factors associated with this co-administration in the health district of Podor (Senegal).


 This cross-sectional study was conducted among 726&#160;children aged 12 to 23&#160;months.  This was a two-stage cluster sampling.  The data was collected in June&#160;2020.  An electronic questionnaire was developed using the Open Data Kit Collect application.  Co-administration was modeled as one dose, two doses and three doses.  Ordinal logistic regression was used to search for factors likely to influence co-administration.


 Of the 726&#160;children, 115 (16%), 234 (32%) and 377&#160;(52%) received a single dose, two and three doses, respectively.  Factors associated with co-administration were recognition by mothers or caregivers that several vaccines can be administered simultaneously (adjusted&#160;OR&#160;=&#160;1.46, p-value&#160;=&#160;0.017), availability of a health record kept at home (adjusted&#160;OR&#160;=&#160;6.88, p-value&#160;=&#160;0.006), hospitalization of the newborn after birth (adjusted&#160;OR&#160;=&#160;1.74, p-value&#160;=&#160;0.002) and receipt of advice during postnatal care (adjusted&#160;OR&#160;=&#160;1.72, p-value&#160;=&#160;0.01).


 CONCLUSION
 Co-administration of birth doses is an infrequent practice in Podor.  Awareness and availability and proper maintenance of health information management tools would be necessary.
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