中文摘要：

目的 研究南京地区0~5岁儿童血清钙水平及其与季节的关系。方法 采用BH5100型原子吸收光谱仪检测南京地区24 977例0~5岁儿童末梢血中的钙元素含量,分析其与不同因素间的关系。结果 0~5岁儿童钙水平为（1.78±0.17）mmol/L。钙缺乏的548例（2.2%）儿童中,0~1岁儿童居多。5岁女童的钙水平高于男童[（1.80±0.16）mmol/L vs.（1.77±0.15）mmol/L]（P〈0.05）,而其他各年龄段男童和女童的钙水平无统计学差异（P〉0.05）。第1、2季度钙水平高于第3、4季度[（1.80±0.15）mmol/L、（1.80±0.16）mmol/L vs.（1.76±0.15）mmol/L、（1.77±0.15）mmol/L]（P〈0.05）。结论 儿童发育的不同时期都应当注意钙的补充。

英文摘要：

Objective To investigate serum level of calcium and its relationship with the seasons in children aged 0-5 years old in Nanjing district. Methods Serum level of calcium in 24 977 children aged 0-5 years old in Nanjing was detected with BH5100 atomic absorption spectrometer, Then its relationship with different factors was analyzed. Results Serum level of calcium in children was （1.78±0.17） nmaol/L. The majority of 548（2. 2%） children with calcium deficiency were those aged 0-1 year old. Serum level of calcium in girls aged 5 years old was higher than that in boys[（1.80 ±0.16） mmol/L vs. （1.77±0. 15） mmol/L] （P〈0. 05）, while there was no significant difference between boys and girls in the other age groups（P〉0. 05）. Serum levels of calcium in the first and second seasons of the year were higher than those in the third and fourth seasons [（1. 80 ±0.15） mmol/L and （1.80±0. 16） rnmol/L vs. （1.76±0. 15） mmol/L and （1] 77±0. 15） mmol/L]（P〈0. 05）. Conclusion Attention should be paid to calcium supplement during different developmental stages of children.