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Int J Obes Relat Metab Disord. 2002 Apr;26(4):437-41.

Twins and virtual twins: bases of relative body weight revisited.

Author information

  • 1Department of Psychology and Twin Studies Center, California State University, Fullerton 92834, USA. nsegal@fullerton.edu

Abstract

OBJECTIVE:

Application of a new investigative strategy to assess genetic and environmental influences on relative body weight.

DESIGN:

Covariance structure analysis of body mass index (BMI) using genetically informative samples.

SUBJECTS:

One-hundred and fourteen monozygotic (MZ) twin pairs (age 5.04-22.93 y), 81 dizygotic (DZ) twin pairs (age 6.05-16.52 y), and 98 virtual twin (VT) pairs, ie same-age unrelated siblings (3.68-54.75 y).

MEASUREMENTS:

Height, weight, BMI variously obtained by direct measurement and self-report.

RESULTS:

In contrast with most previous studies, significant common environmental influence on BMI was observed.

CONCLUSION:

Much past research may have underestimated common environmental effects on BMI because the designs lacked the power or ability to detect them.

PMID:
12075568
[PubMed - indexed for MEDLINE]
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