未经评估:本研究旨在研究体重指数(BMI)之间的关系,性激素,瘦素,和irisin在不同体型的儿童和青少年中。
未经批准:在这项研究中,采用分层整群随机抽样方法,从两所9年制学校中选取8~15岁的学生作为研究对象.基于一项病例对照研究,选择了183名超重/肥胖学生。在使用性别和年龄匹配创建匹配的正常加权学生样本后,共计366名学生,包括214名男孩(58.5%)和152名女孩(41.5%)。我们测量了他们的身高和体重,并计算了他们的体重指数BMI。之后,它们的瘦素浓度,irisin,雌二醇(E2),检测血清中的睾酮(T)。
未经评估:T,E2,瘦素,正常体重男孩和女孩之间的irisin(p<0.05)。T差异有统计学意义,超重/肥胖男孩和女孩之间的E2和irisin(p<0.05)。超重/肥胖学生的irisin和瘦素浓度高于正常体重学生(p<0.05)。在正常或超重/肥胖学生中,BMI对irisin的直接影响均无统计学意义,但是它们通过瘦素的间接作用具有统计学意义(对于体重正常的男孩和女孩,标准化间接影响系数:分别为0.29和0.38;对于超重/肥胖的男孩和女孩,标准化间接影响系数:分别为0.36和0.34)。正常体重男孩存在E2→瘦素→irisin的负途径(标准化间接效应系数:-0.24),超重/肥胖男孩存在T→瘦素→irisin的负途径(标准化间接效应系数:-0.27)。
UNASSIGNED:BMI通过瘦素对irisin的间接影响存在于不同体型的儿童和青少年中。在正常体重男孩中,E2与瘦素呈负相关。而在超重/肥胖男孩中,T与瘦素呈负相关。
UNASSIGNED: The present research aimed to study the relationship between body mass index (BMI), sex hormones, leptin, and irisin in children and adolescents with different body types.
UNASSIGNED: In this study, a stratified cluster random sampling method was used to select students aged 8-15 years from two 9-year schools as the research subjects. Based on a case-control study, 183 overweight/obese students were selected. After using sex and age matching to create a matched sample of normal-weighted students, a total of 366 students, including 214 boys (58.5%) and 152 girls (41.5%) were included. We measured their height and weight and calculated their body mass index BMI. Afterward, their concentrations of leptin, irisin, oestradiol (E2), and testosterone (
T) in the serum were detected.
UNASSIGNED: There were significant differences in
T, E2, leptin, and irisin between normal-weighted boys and girls (p < 0.05). There were statistically significant differences in
T, E2, and irisin between overweight/obese boys and girls (p < 0.05). Overweight/obese students had higher concentrations of irisin and leptin than normal-weight students (p < 0.05). The direct effect of BMI on irisin was not statistically significant in either normal or overweight/obese students, but their indirect effects via leptin were statistically significant (for normal-weight boys and girls, standardized indirect effect coefficient: 0.29 and 0.38, respectively; for overweight/obese boys and girls, standardized indirect effect coefficient: 0.36 and 0.34, respectively). There was a negative pathway of E2 → leptin → irisin in normal-weight boys (standardized indirect effect coefficient: -0.24) and a negative pathway of
T → leptin → irisin in overweight/obese boys (standardized indirect effect coefficient: -0.27).
UNASSIGNED: The indirect effects of BMI on irisin via leptin exist in children and adolescents of different body types. E2 was negatively correlated with leptin in normal-weight boys, whereas
T was negatively correlated with leptin in overweight/obese boys.