INCC UMR 8002, CNRS, Université de Paris, F-75006 Paris, France.
Centre for Research in Epidemiology and Statistics (CRESS), INSERM, INRAE, Université de Paris, F-75004 Paris, France.
Int J Environ Res Public Health. 2021 Mar 29;18(7):3529. doi: 10.3390/ijerph18073529.
The goal of the study was to investigate some of the factors suspected to be related to children's handedness: presentation during the last weeks of gestation and at birth (cephalic or breech), side of presentation (right or left), number of weeks of gestation, season of birth, parents' handedness and sex. We analyzed the relationships between these factors and the child's handedness at five years. Children ( = 1897) from the EDEN cohort participated in the study, among which 1129 were tested for handedness at five. The father's handedness, but not the mother's, was significantly related to the child's hand preference. The percentage of left-handed children was significantly larger when the father was non-right-handed compared to right-handed, and tended to be larger among children in non-left-cephalic presentation compared to left-cephalic presentation. Girls, but not boys, were significantly less lateralized when they were born before 37 weeks of pregnancy than after. Finally, children born in winter or spring were slightly but significantly less lateralized than children born in summer or autumn. All six children who were not lateralized at 5 presented one or several of these factors. These results are discussed in light of the mixed model of handedness.
在妊娠最后几周和出生时（头位或臀位）的体位（右侧或左侧）、体位侧、妊娠周数、出生季节、父母的利手性和性别。我们分析了这些因素与儿童 5 岁时利手性之间的关系。EDEN 队列的儿童（n=1897）参与了这项研究，其中 1129 名儿童在 5 岁时接受了利手性测试。父亲的利手性，但不是母亲的利手性，与儿童的惯用手偏好显著相关。与右利手的父亲相比，非右利手的父亲所生的左利手儿童的比例显著更大，与左头位相比，非左头位的儿童中左利手的比例也更大。与妊娠 37 周后出生的儿童相比，妊娠不足 37 周出生的女孩明显而非男孩明显更偏向右侧。最后，冬季或春季出生的儿童比夏季或秋季出生的儿童略倾向于不偏向于任何一侧。所有 6 名在 5 岁时没有偏向任何一侧的儿童都存在这些因素中的一个或多个。这些结果是根据惯用手的混合模型讨论的。
