Study on blood lipids and their influencing factors in urban schoolchildren

  Objective   To explore the disrtributing characteristics and influencing factors of blood lipids in urban schoolchildren, and to offer the scientific basis for eliminating cardiovascular disease risk factors in schoolchildren.

  Methods   913 schoolchildren aged 7-13 were chosen randomly among Shijiazhuang city by multi-stage sampling. Blood pressure, height and weight were measured. Fasting blood serum was collected to determine total cholesterol(TC), triglyceride(TG), high-density lipoprotein cholesterol(HDL-C), fasting serum glucose and blood calcium. The children's dietary status, behavior, personality and family history were obtained by offering and collecting questionnaires for each child.

  Results   TC and HDL-C of schoolchildren showed a tendency to drop with age increasing, but it was not obvious for TG to change with age increasing. Prevalences of abnormal TC, TG and HDL-C were 8.9%, 5.6% and 6.0% respectively. Multiple stepwise regression analysis showed that TG, HDL-C and age were influencing factors for TC; TC, HDL-C, BMI, blood calcium, family history of parents' hyperlipidemia and sex for TG; and TC, TG, blood calcium, BMI, frequency of eating sweet food and fruits for HDL-C.

  Conclusion   Controlling abnormal blood lipids in children and eliminating adverse influencing factors would be helpful to eliminate cardiovascular disease risk factors in children, and protect children from cardiovascular diseases and reduce risk factors resulting in cardiovascular diseases in aduldtood.