关键词: 性早熟, 发病率, 病例对照研究

Abstract: 【Objective】 To understand the morbidity and causes of child sexual precocity in Jiujiang,and provide a theoretical basis for the prevention of this disease. 【Methods】 In a total of 3 312 children aged 3~12 years old who were recruited by stratified cluster sampling method from three district primary school and 3 kindergartens were stag evaluation with their breast,testis pubes get respondents menarche and spermatorrhea,diet and sleep habits,hobbies and children 's parents adolescent development through the issuance of a parent questionnaire. 【Results】 The positive rate of children sexual precocity in Jiujiang city was 0.68%,the detection rate of girls (1.25%) was high than boys (0.11%),the difference was statistically significant (χ²=16.119,P=0.000).The beginning age of breast development was (10.26±2.34) years old,in which the age of city girls was (9.91±1.85) years and earlier than suburban girls whose age was (11.29±1.38) years,the difference was statistically significant (P=0.000).Developmental age of pubic hair was (11.67±0.84) years,in which city girls was (11.68±0.85) years and suburban girls was (11.63±0.86) years without statistical significance.There were significant difference between precocious puberty group and normal one in edible animal food,nutrition tonic,beverage,lack of physical exercise,unhealthy living habits,parents lack of parental knowledge,and genetic factors. 【Conclusions】 Those factors with often feed animal food,nutrition tonic and beverage,lack of physical exercise,unhealthy living habits,children parents lack of parental knowledge,and genetic factors are promote action in the pathogenesis of precocious puberty.

Key words: sexual precocity, morbidity, case control study