Nutrition and Behaviour Unit, School of Psychological Science, University of Bristol, Bristol, UK.
Department of Psychology, University of Roehampton, London, UK.
Clin Obes. 2021 Jun;11(3):e12438. doi: 10.1111/cob.12438. Epub 2021 Jan 12.
Eating quickly is associated with eating larger amounts at mealtimes and faster eaters tend to have a higher BMI. Evidence suggests that sibling structure influences the development of childhood eating behaviours. We hypothesized that number of siblings and birth order might play a role in the development of eating rate. In two UK studies, children in Bristol (n = 132; Study 1) and adults and children in London (adults n = 552, children n = 256; Study 2) reported their eating rate, number of siblings, and birth order. A BMI measurement was obtained and in Study 2 waist circumference was recorded. Ordered logistic regression was used to examine effects of sibling structure on eating rate and linear regression assessed effects of eating rate on BMI. Faster eating was associated with higher BMI and a larger waist, in children and adults (ps < .01). In Study 1, first-born children were twice as likely to eat faster compared to children who were not first-born (P < .04). In Study 2, only-child adults reported eating slower than adults who were not first-born (P < .003). Additionally, higher number of siblings was associated with faster eating rate in children from Bristol (P < .05), but not in children from London. London adults without siblings ate slower than those with two or more (P = .01), but having one sibling was associated with eating faster than having two or more (P = .01). These findings reveal how birth order and number of siblings might influence eating rate. Exploring these relationships through direct observation would be beneficial in future studies.
进食速度快与每餐进食量较大有关，而进食较快的人往往 BMI 较高。有证据表明，兄弟姐妹结构会影响儿童饮食习惯的发展。我们假设兄弟姐妹的数量和出生顺序可能在进食速度的发展中起作用。在两项英国研究中，布里斯托尔的儿童（n=132；研究 1）和伦敦的成年人和儿童（成年人 n=552，儿童 n=256；研究 2）报告了他们的进食速度、兄弟姐妹数量和出生顺序。测量了 BMI，在研究 2 中还记录了腰围。有序逻辑回归用于检验兄弟姐妹结构对进食速度的影响，线性回归评估了进食速度对 BMI 的影响。儿童和成年人中，进食速度较快与 BMI 和腰围较大有关（p<0.01）。在研究 1 中，与非长子长女相比，长子长女进食速度快两倍的可能性是其两倍（P<0.04）。在研究 2 中，只有一个孩子的成年人报告的进食速度比非长子长女慢（P<0.003）。此外，布里斯托尔的儿童中，兄弟姐妹数量越多，进食速度越快（P<0.05），而伦敦的儿童则不然。没有兄弟姐妹的伦敦成年人比有两个或更多兄弟姐妹的成年人进食速度慢（P=0.01），但与有两个或更多兄弟姐妹的成年人相比，有一个兄弟姐妹的成年人进食速度更快（P=0.01）。这些发现揭示了出生顺序和兄弟姐妹数量如何影响进食速度。在未来的研究中，通过直接观察来探索这些关系将是有益的。
