Fabsitz R, Feinleib M, Garrison R
Prog Clin Biol Res. 1978;24 Pt B:71-9.
We have considered a group of questions which attempt to define the environments of twins in our study both within and between twin pairs. Only 8 of 31 questions on which twins compared themselves to their co-twins were reliable and showed discordance for twin pairs. Comparing discordant twins for cardiovascular risk factors, few significant results were obtained. Cigarette smoking seemed to be most closely related to the environmental differences; but negatively related to achievement in grade school and high school and to which twin was stronger in childhood. Weight at examination appeared to be related to strength in childhood. In addition, there may be a negative relationship between income and blood pressure. One additional question showed MZ twins get together significantly more often than DZ twins. In terms of differnces in environmental covariance, the question "how frequently do you and your twin get together now?" may be a simple but valuable measure of similarity of twins and should be considered for inclusion in twin studies.
我们考虑了一组问题，这些问题试图在我们的研究中定义双胞胎在双胞胎对内部和之间的环境。在31个双胞胎将自己与同卵双胞胎进行比较的问题中，只有8个是可靠的，并且显示出双胞胎对之间的不一致。比较不一致的双胞胎的心血管危险因素，获得的显著结果很少。吸烟似乎与环境差异关系最为密切；但与小学和高中的成绩以及童年时哪个双胞胎更强壮呈负相关。检查时的体重似乎与童年时的力量有关。此外，收入和血压之间可能存在负相关。另一个问题显示，同卵双胞胎比异卵双胞胎聚在一起的频率明显更高。就环境协方差的差异而言，“你和你的双胞胎现在多久聚一次？”这个问题可能是衡量双胞胎相似性的一个简单但有价值的指标，应该考虑纳入双胞胎研究。
