Fig. 1.

Mean and standard deviation of teeth with caries experience at 7 years according to birth order. Number of children with “birth order 1” = 30,057 children; “2” = 23,028 children; “3” = 8021 children; “4” = 1971 children; “5” = 571 children; “6” = 161 children; “7” = 58 children; “8” = 45 children; “9” = 11 children; “10” = 4 children; “11” = 4 children; and “12” = 3 children