Does being tall mean you’re more likely to go to college?
Background Adult body height has been related to socioeconomicposition in cross-sectional studies. Intelligence, shared familyfactors, and non-familial circumstances may contribute to associationsbetween height and attained education, but their relative importancehas been difficult to resolve.
Methods A nation-wide record-linkage cohort study of over 950000 Swedish men born 1950–75 followed with respect toattained education for up to 27 years after measurement of heightat age 18 (baseline). The association between height and attainededucation in later life was investigated by logistic regressionmodelling with adjustment for age, geography, parental socioeconomicposition, and cognitive ability. Shared family factors wereaccounted for in analyses of full-brother-pairs using conditionallogistic regression.
Results The odds ratio (OR) for attaining higher education 7–27 years after baseline was 1.10 [95% confidence interval (95% CI) 1.09–1.10] in fully adjusted models per 5 cm increase in height. Men taller than 194 cm were two to three times more likely to obtain a higher education as compared with men shorter than 165 cm. The association remained within brother-pairs, OR 1.08 (95% CI 1.07–1.10), suggesting that non-familial factors contribute to the association between height and education attainment. A significant interaction (P < 0.0001) was foundbetween year of birth, height, and attained education, showingslightly weaker associations among later birth cohorts.
Conclusions The strong positive association between height and educational achievement remaining after adjustment for year of birth, parental socioeconomic position, other shared family factors, and cognitive ability may reflect educational discrimination based on height although residual confounding cannot be ruled out.
Source: “Height at age 18 years is a strong predictor of attained education later in life: cohort study of over 950 000 Swedish men” from International Journal of Epidemiology 2006 35(3):658-663
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