Table 1 American Academy of Pediatrics (AAP) well baby visit periodicity schedule from 2000 and operationalization of study outcome measure (total number of well baby visits received by age three years)

1 month

7 days to <1 month

2 month

1 month to <3 months

4 month

3 months to <5 months

6 month

5 months to <8 months

9 month

8 months to <11months

12 month

11 months to <14months

15 month

14 months to <17 months

18 month

17 months to <20 months

24 month

20 months to <30 months

36 month

30 months to 41 months