Side jobs and household chores

The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR).

荷兰双生子登记库（Netherlands Twin Register, NTR）由自愿参与双生子家庭研究的个体构成，由阿姆斯特丹自由大学生物心理学系建立并管理，相关信息可访问网址：https://tweelingenregister.vu.nl/。该登记库始建于1987年，目前已登记约12万名双生子及其数量大致相当的亲属。多数双生子家庭已参与过一次或多次针对一系列流行病学变量的调查研究，涵盖社会人口学特征、人格特质、生活方式、躯体与心理健康状况等；部分子样本则参与了生物样本采集（如脱氧核糖核酸（DNA））以及针对神经心理学、生物标志物与行为特质的专项研究。该登记库的招募完全开放，对入组无任何限制条件。该登记库致力于通过运营官方网站、电子通讯以及为参与者提供个性化反馈的MijnNTR门户平台，积极争取参与者对科研事业的支持，并推动其持续参与本库的研究工作。该登记库的各类资源，例如纵向表型评估、扩展家系结构以及多代基因分型数据，可为未来的双生子家庭研究提供支撑，相关研究将助力基因发掘、因果关系建模以及行为特质、身心健康的遗传与文化传承相关研究。在CID数据目录中，仅纳入了针对18岁以下儿童与青少年的荷兰双生子登记库研究项目，该部分内容被称为青年荷兰双生子登记库（Young Netherlands Twin Register, YNTR）。