Centre for Health Equity Studies, Karolinska Institutet/Stockholm University, Sweden.
Acta Paediatr. 2012 Jun;101(6):591-6. doi: 10.1111/j.1651-2227.2012.02636.x. Epub 2012 Mar 27.
To investigate how being born and raised as a twin is associated with IQ, educational achievement and vocational career.
Register study in a national birth cohort, complemented with a siblings study. The study population included 13,368 individuals born and raised as twins and 837,752 singletons, including 3019 siblings of twins, in the Swedish birth cohorts of 1973-1981. Our outcome measures were mean grade points on a five point scale from ninth grade of primary school at 15-16 years, IQ tests on a nine grade point scale from male conscripts at 18-19 years, highest completed education, disability benefits, work income and employment at 27-35 years of age.
Twins had slightly better mean grade point averages in ninth grade; +0.08 (95% CI 0.04-0.11) and more often had completed a university education in young adulthood; OR 1.16 (1.02-1.21) compared with singleton siblings, despite male twins having a slightly lower IQ at military conscription compared with male singletons. Employment rates, mean income and disability benefits were similar in twins and singletons.
Twins have slightly better educational careers and similar vocational careers compared with those born as singletons.
研究作为双胞胎出生和成长如何与智商、教育成就和职业生涯相关联。
在全国出生队列中进行注册研究，并辅以兄弟姐妹研究。研究人群包括 1973-1981 年瑞典出生队列中 13368 名作为双胞胎出生和成长的个体以及 837752 名作为单胎出生的个体，其中包括 3019 名双胞胎的兄弟姐妹。我们的结局指标是 15-16 岁时从小学 9 年级开始的五分制平均年级成绩点、18-19 岁时男性应征者的九级制智商测试成绩点、最高完成的教育程度、残疾津贴、27-35 岁时的工作收入和就业情况。
与单胎兄弟姐妹相比，双胞胎在 9 年级的平均成绩略高；+0.08（95%CI 0.04-0.11），并且在年轻成年时更经常完成大学教育；OR 1.16（1.02-1.21），尽管男性双胞胎在军事应征时的智商略低于男性单胎。双胞胎和单胎的就业率、平均收入和残疾津贴相似。
与单胎出生的个体相比，双胞胎的教育生涯略好，职业生涯相似。
