The FAO data on stature have been used to objectively classify cohorts of cattle, and the data were not adjusted for other traits given the nonavailability of FAO records for the correlated traits.
A study design should strive for prospective recording of drug intake during pregnancy, comparison to appropriate control groups adjusted for inherited traits, and single drug exposures for evaluation of specific syndromic causation, such as the Fetal Hydantoin Syndrome.
VE adjusted for age, sickle cell trait, village of residence and distance of residence from the Kombewa Clinical Research Center was 11.0% (95% CI −49.7 to 47.1: p = 0.659) in recipients of RTS,S/AS01B and 35.0% (95% CI −9.9 to 61.6: p = 0.108) in recipients of RTS,S/AS02A.
At the position with the highest LRT, the substitution effect of QTL alleles was estimated in each sire family and significance of the effect (difference from 0) was tested by a t-test, using the within-family residual standard error, i.e. the intra QTL genotype distribution of the trait adjusted for the other effects in the model (fixed, covariate and polygenic).
We used the empirical variance of the observed traits adjusted for sex, maternal diabetes and parity to simulate phenotypes from a normal distribution, so that variance across genotypes is drawn from the estimated variance.
We subsequently created residuals of daily physical activity traits adjusted for sex, age, and age-squared.
Logistic regression analyses of genotypes association with disease traits, adjusted for age, gender, and population (urban/rural).
Since the two SNPs studied were in strong linkage disequilibrium (D' = 0.946 and r = 0.657), we therefore conducted logistic regressions to assess the association between haplotypes and the disease traits adjusted for the subject's age, gender and environment (urban/rural).
Each trait was adjusted for sex and age, and the residuals were transformed to ensure their normal distribution using quantile normalization.
