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Table 2 Chronogram of study activities and measurements of child development scales

From: Assessing the effect of an educational intervention on early childhood development among Mexican preschool children in the state of Oaxaca: a study protocol of a cluster randomized stepped-wedge trial

Activities

Study calendar period

t0

t1

t2

t3

t4

t5

t6

Community’s allocation

X

      

Eligibility in communities A

 

X

     

Enrollment in communities A

 

X

     

Measurement in communities A*

 

X

X

X

X

X

X

Eligibility in communities B

  

X

    

Enrollment in communities B

  

X

    

Measurement in communities B*

  

X

X

X

X

X

Eligibility in communities C

    

X

  

Enrollment in communities C

    

X

  

Measurement in communities C*

    

X

X

X

Eligibility in communities D

      

X

Measurement in communities D

      

X

Measurement of CDE-II

 

X

X

X

X

X

X

Measurement of MSCA

      

X

Measurement of BSID-III

 

X

X

X

   

Nutritional status assessment

 

X

X

X

X

X

X

  1. *Intervention starts right after their first measurement. There will be a time span of 6 months between the mid-point of consecutive periods and an approximate time span of 6 months between consecutive individual measurements