Objective@#To analyze the differences of cardiovascular(CV)
risk factors between middle
school students with normal weight but high
body fat and
students with normal weight and normal
body fat in
urban area of Yinchuan,to provide a theoretical basis for early
detection of their invisible
obesity and controlling CV
metabolism disease.@*
Methods@#During 2017 to 2018, a total of 1 043
secondary school students in
urban area of Yinchuan were selected through
cluster sampling.
Questionnaire survey,
physical examination,
body composition and
blood lipid test were conducted among all the participants.745 middle
school students with normal
body mass index (BMI) were included in the
analysis.@*Results@#Nearly 31.1%
students with normal BMI had high
body fat, with
girls significantly higher than that in
boys across different
age groups(χ2=10.37,106.49,P<0.01). Total
cholesterol (TC) in
boys with normal-weight
obesity was higher than that in the normal group, while diastolic
blood pressure (DBP),
triglyceride (TG), TC and lowdensity
lipoprotein cholesterol (LDL-C) in
girls with normal-weight
obesity were significantly higher than that in the normal group, with statistically significant differences (t=-2.37,-3.82,-3.48,-4.46,-4.68,P<0.01). The
detection rates of
high blood pressure, high TC level and high LDL-C level in normalweight obese
girls were all higher than those in normal group (χ2=4.17,8.77,5.91,P<0.05). The
detection rate of CV
risk factors ≥2 in normal-weight
obesity group was higher than that in the normal group, and the difference was statistically significant(χ2=7.05,P<0.01).@*Conclusion@#Normal-weight
obesity among middle
school students in
urban area of Yinchuan is prevalent, which is mainly concentrated in
female students. Moreover,
cardiovascular risk factors are more common among those normal-weight obese
students compared with normal
students. Interventions for preventing and controlling normal-weight
obesity should be developed and implemented as early as possible.