Spatial and temporal distribution of abnormal ALT among candidates for the high school entrance examination in Beijing / 预防医学

ABSTRACT

Objective@#To learn the temporal and spatial distribution of abnormalalanine aminotransferase（ALT）and its influencing factorsamong candidates for the high school entrance examination in Beijing,and to provide evidence for prevention of abnormal ALT in adolescents.@*Methods@#The physical examination data of the candidates in Beijing from 2009 to 2018 were collected from Beijing Physical Examination Center. The time,space and population distribution of abnormal ALT was analyzed;the time-space interaction trend of abnormal ALT was described by bubble map;and the Bayesian spatio-temporal model was built to explore the influencing factors of abnormal ALT in middle school students.@*Results@#Among 884 915 candidates,5 354 candidates had abnormal ALT,accounting for 0.61%. The rate of abnormal ALT showed an upward trend from 2009 to 2018（P<0.05）.The rate of abnormal ALT was 0.95% in males and 0.23% in females,5.09% in obese candidates and 0.18% in non-obese ones,0.70% in urban area and 0.48% in rural area,and the differences between gender,obesity and residence were all statistically significant（P<0.05）. From 2009 to 2018,the rates of abnormal ALT among the candidates in Changping District remained the highest;the rate in Shunyi District and Daxing District showed an increasing trend;the rates in Haidian District,Chaoyang District and Fengtai District were relatively high,the rates in Miyun District and Pinggu District were relatively low,while the trend of them were not obvious. The results of the Bayesian space-time model showed that the risk of abnormal ALT increased by 5.706 times for each unit increase of regional male percentage and increased by 8.679 times for each unit increase of regional obesity percentage.@*Conclusion@#The rate of abnormal ALT among candidates for the high school entrance examination in Beijing shows a upward trend. The rates of abnormal ALT among the candidates in Changping District,Haidian District,Chaoyang District and Fengtai District are relatively high,and the rates in Shunyi District and Daxing District tend to rise. Males and obese students are the high risk groups of abnormal ALT.