Kristiansen Hege, Roelants Mathieu, Bjerknes Robert, Juliusson Petur B
Departement of Paediatrics, District General Hospital of Førde, Førde, Norway.
Department of Clinical Science, University of Bergen, Bergen, Norway.
Acta Paediatr. 2020 Mar;109(3):587-594. doi: 10.1111/apa.15019. Epub 2019 Oct 18.
To study how sociodemographic factors and family structure associate with baseline BMI z-scores (BMIz) and BMIz change in 767 Norwegian children aged 6-15 years.
Baseline BMIz and 1-year BMIz increments in children from the Bergen Growth Study were analysed with linear and logistic regression, according to sociodemographic factors and family structure. A blended family was defined as including a step-parent and/or half-sibling.
In a fully adjusted regression model, baseline BMIz were only significantly associated with maternal BMI (b = 0.087, 95%CI 0.067, 0.107). Body Mass Index z-scores increments were larger in children living in a blended family (b = 0.060, 95%CI 0.006, 0.115), with a lower parental education (b = 0.127, 95%CI 0.029, 0.226) and with a higher maternal BMI (b = 0.008, 95%CI 0.001, 0.014). The odds for a large BMIz increment (>1 SD) were higher in children living in blended families (OR 1.82, 95%CI 1.16, 2.88) and with higher maternal BMI (OR 1.07, 95%CI 1.01, 1.13) and lower in 9-11-year-old children (OR 0.44, 95%CI 0.26, 0.77) compared with 12-15-year-olds.
Body Mass Index z-scores increments were more strongly associated with sociodemographic factors and living in a blended family than baseline BMIz values. BMI z-scores increments could be useful for identifying children at risk of becoming overweight or obese.
研究社会人口统计学因素和家庭结构如何与767名6至15岁挪威儿童的基线BMI z评分（BMIz）及BMIz变化相关。
根据社会人口统计学因素和家庭结构，采用线性和逻辑回归分析卑尔根生长研究中儿童的基线BMIz和1年BMIz增量。混合家庭定义为包括继父母和/或同父异母或同母异父的兄弟姐妹。
在一个完全调整的回归模型中，基线BMIz仅与母亲BMI显著相关（b = 0.087，95%CI 0.067，0.107）。与母亲BMI较高（b = 0.008，95%CI 0.001，0.014）、父母教育程度较低（b = 0.127，95%CI 0.029，0.226）以及生活在混合家庭中的儿童（b = 0.060，95%CI 0.006，0.115）相比，BMI z评分增量更大。与12至15岁儿童相比，生活在混合家庭中的儿童（OR 1.82，95%CI 1.16，2.88）、母亲BMI较高的儿童（OR 1.07，95%CI 1.01，1.13）以及9至11岁儿童（OR 0.44，95%CI 0.26，0.77）出现较大BMIz增量（>1个标准差）的几率更高。
与基线BMIz值相比，BMI z评分增量与社会人口统计学因素及生活在混合家庭中的关联更为密切。BMI z评分增量可能有助于识别有超重或肥胖风险的儿童。
