We assessed the association of SNPs in the VDR gene and postmenopausal breast cancer risk by means of conditional logistic regression with stratification by year of birth (continuous) and additional stratification by time of blood collection (January to March, April to June, July to September, or October to December) in models assessing interaction with 25(OH D.
Because haplo.glm uses an unconditional approach, we adjusted for the same covariates as in the genotype analysis model but additionally adjusted for the matching variable year of birth and for time of blood collection in models assessing interaction with 25(OH D.
Conservation needs include regular monitoring throughout the range to determine population trends, particularly after El Niño years; restricting human access to important breeding colonies; and assessing interactions with fisheries.
Because serum uric acid levels have been associated with fructose consumption [6], [27], we assessed interaction with serum uric acid (as a continuous variable) and with hyperuricemia (categorically defined as the highest quartile of serum uric acid, 6.3 mg/dL or higher).
In addition, we assessed interaction with race, age, and BRCA status through stratified analyses and statistical tests of multiplicative interaction.
We used a combined effects method to assess interaction, with the p value of the interaction term indicating statistical significance of addictive interactions.
To assess the proportionality assumption, we checked for interaction between each risk factor and time since AIDS diagnosis; for highly active antiretroviral therapy, a time-dependent covariate, we assessed interaction with time since start of treatment.
Several studies have been performed with air pollutants to assess interaction with allergenic response; some have shown that asthmatic response could be enhanced by a brief preexposure to air pollutants, in particular, nitrogen dioxide or ozone (Barck et al. 2005; Jörres et al. 1996; Molfino et al. 1991; Strand et al. 1997; Tunnicliffe et al. 1994).
For now, though, the best resolution cryo-EM GPCR structure clocks in at 3.8 Å, good enough to assess interactions with larger peptide ligands but missing the detail needed for small molecules.
We considered child sex as an effect modifier and assessed interactions with cross-product terms.
For temperature, we assessed interactions with age, BMI, intake of beta blockers, sex, and season.
