Multiple-community-based epidemiological study of stuttering among 3-year-old children in Japan

The data set "raw data_1974" contains the data of 1974 children as (1) ID, (2) Prefecture, (3) Classification of disfluencies, (4) Age of month, (5) Sex, (6) Has siblings, (7) Development of language, (8) Family history of stuttering, (9) Concern about the child's development, (10) Child's diseases or disabilities, (11) Household income, (12) Highest educational attainment of the father, (13) Highest educational attainment of the mother. The data set "raw data_child's disease or disabilities" contains the data of 108 child with disease or/and disabilities, which are (1) Classification of disfluencies and (2) Name of specific disease or disability. The data set "raw data_concern about the child's development" contains the data of 513 child whose guardians have concern, which are (1) Classification of disfluencies and (2) Any specific concerns.