PDF(Pubmed)
Abstract：
BACKGROUND: The variation in body mass index (BMI) of inpatients with anorexia nervosa has not been analyzed across the age span. A positive correlation between BMI and age has been reported in adolescent inpatients aged 15 years and younger that levels off at 15 to 18 years. BMIs standardized for age and sex (standard deviation scores, SDSs) were negatively correlated with age in these inpatients aged 8 to 18 years.
METHODS: The aims of the current retrospective study were threefold: first, to confirm the relationships of BMI, BMI-SDS and age in adolescent inpatients in a larger sample; second, to systematically assess the relationship of BMI, BMI-SDS, body height-SDS and age in adult inpatients at the time of referral; and third, to assess body height-SDSs and age to evaluate stunting.
RESULTS: We included 1001 girls (aged 12-17.9 years) and 1371 women (aged 18-73 years) admitted to inpatient treatment between 2014 and 2021. Mean BMI at admission was 14.95 kg/m2 (SD = 1.43; range 10.67-18.47) in adolescents and 14.63 kg/m2 (SD = 2.02; range 8.28-18.47) in adults. None of the adolescent patients but 20 adults had very low BMI values below 10 kg/m2. Adolescents showed a small but significant positive correlation between age and BMI (r = 0.12; p = 2.4 × 10-4). In adults, BMI was not correlated with age (r = -0.03; p = 0.3). BMI-SDSs was negatively correlated with age in adolescents and less so in adults (r = -0.35; p < 0.001 and r = -0.09; p = 0.001). Curve fit analyses for all patients indicated that there was a quadratic (age × age) relationship between age and BMI-SDS. Height correlated positively with BMI in adult (r = 0.1; p < 0.001) and adolescent (r = 0.09 p = 0.005) patients and we detected no evidence for stunting.
CONCLUSIONS: In conclusion, the BMI of inpatients seems to be relatively stable across the age span with mean values between 14 and 15 kg/m2. BMI values initially increase with age in younger patients, drop between ages 18 and 23 and then slowly decline with age.
METHODS: The aims of the current retrospective study were threefold: first, to confirm the relationships of BMI, BMI-SDS and age in adolescent inpatients in a larger sample; second, to systematically assess the relationship of BMI, BMI-SDS, body height-SDS and age in adult inpatients at the time of referral; and third, to assess body height-SDSs and age to evaluate stunting.
RESULTS: We included 1001 girls (aged 12-17.9 years) and 1371 women (aged 18-73 years) admitted to inpatient treatment between 2014 and 2021. Mean BMI at admission was 14.95 kg/m2 (SD = 1.43; range 10.67-18.47) in adolescents and 14.63 kg/m2 (SD = 2.02; range 8.28-18.47) in adults. None of the adolescent patients but 20 adults had very low BMI values below 10 kg/m2. Adolescents showed a small but significant positive correlation between age and BMI (r = 0.12; p = 2.4 × 10-4). In adults, BMI was not correlated with age (r = -0.03; p = 0.3). BMI-SDSs was negatively correlated with age in adolescents and less so in adults (r = -0.35; p < 0.001 and r = -0.09; p = 0.001). Curve fit analyses for all patients indicated that there was a quadratic (age × age) relationship between age and BMI-SDS. Height correlated positively with BMI in adult (r = 0.1; p < 0.001) and adolescent (r = 0.09 p = 0.005) patients and we detected no evidence for stunting.
CONCLUSIONS: In conclusion, the BMI of inpatients seems to be relatively stable across the age span with mean values between 14 and 15 kg/m2. BMI values initially increase with age in younger patients, drop between ages 18 and 23 and then slowly decline with age.
摘要：
背景：神经性厌食症住院患者的体重指数（BMI）的变化尚未在年龄范围内进行分析。据报道，在15岁及以下的青少年住院患者中，BMI与年龄之间呈正相关，在15至18岁时趋于稳定。年龄和性别标准化的BMI(标准差分数，在这些8至18岁的住院患者中，SDSs）与年龄呈负相关。
方法：当前回顾性研究的目的有三个方面：第一，为了确认BMI之间的关系，在更大的样本中，青少年住院患者的BMI-SDS和年龄；第二，为了系统地评估BMI之间的关系，BMI-SDS,转诊时成人住院患者的身高-SDS和年龄；第三，评估身高-SDS和年龄以评估发育迟缓。
结果：我们包括2014年至2021年期间接受住院治疗的1001名女孩（12-17.9岁）和1371名妇女（18-73岁）。青少年入院时的平均BMI为14.95kg/m2（SD=1.43；范围10.67-18.47），成年人为14.63kg/m2（SD=2.02；范围8.28-18.47）。青少年患者中没有一个，但20名成年人的BMI值非常低，低于10kg/m2。青少年在年龄和BMI之间显示出较小但显着的正相关（r=0.12；p=2.4×10-4）。在成年人中,BMI与年龄无关（r=-0.03；p=0.3）。在青少年中，BMI-SDS与年龄呈负相关，而在成年人中，BMI-SDS与年龄呈负相关（r=-0.35；p<0.001，r=-0.09；p=0.001）。所有患者的曲线拟合分析表明，年龄与BMI-SDS之间存在二次（年龄×年龄）关系。成人（r=0.1；p<0.001）和青少年（r=0.09p=0.005）患者的身高与BMI呈正相关，我们没有发现发育迟缓的证据。
结论：结论：住院患者的BMI在整个年龄段似乎相对稳定,平均值在14~15kg/m2之间.在年轻患者中，BMI值最初随着年龄的增长而增加，在18至23岁之间下降，然后随着年龄的增长而缓慢下降。
方法：当前回顾性研究的目的有三个方面：第一，为了确认BMI之间的关系，在更大的样本中，青少年住院患者的BMI-SDS和年龄；第二，为了系统地评估BMI之间的关系，BMI-SDS,转诊时成人住院患者的身高-SDS和年龄；第三，评估身高-SDS和年龄以评估发育迟缓。
结果：我们包括2014年至2021年期间接受住院治疗的1001名女孩（12-17.9岁）和1371名妇女（18-73岁）。青少年入院时的平均BMI为14.95kg/m2（SD=1.43；范围10.67-18.47），成年人为14.63kg/m2（SD=2.02；范围8.28-18.47）。青少年患者中没有一个，但20名成年人的BMI值非常低，低于10kg/m2。青少年在年龄和BMI之间显示出较小但显着的正相关（r=0.12；p=2.4×10-4）。在成年人中,BMI与年龄无关（r=-0.03；p=0.3）。在青少年中，BMI-SDS与年龄呈负相关，而在成年人中，BMI-SDS与年龄呈负相关（r=-0.35；p<0.001，r=-0.09；p=0.001）。所有患者的曲线拟合分析表明，年龄与BMI-SDS之间存在二次（年龄×年龄）关系。成人（r=0.1；p<0.001）和青少年（r=0.09p=0.005）患者的身高与BMI呈正相关，我们没有发现发育迟缓的证据。
结论：结论：住院患者的BMI在整个年龄段似乎相对稳定,平均值在14~15kg/m2之间.在年轻患者中，BMI值最初随着年龄的增长而增加，在18至23岁之间下降，然后随着年龄的增长而缓慢下降。
