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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