The introgression factor loaded on FAMD axis two (Table 3), which explained 25.5% of the variance, suggesting that the level of introgression was not strongly influenced by the year of sampling.
We conducted analyses both by the year of sampling and by pooling samples from early (2006 and 2007) and late (2008 and 2012) sampling periods.
A negative association between HCB and PCBs and GWG rate (% week) was found in a Swedish cohort of pregnant women who showed lower levels of PCBs and HCB before delivery (mean PCBs, 126 ng/g lipid and mean HCB, 23 ng/g lipid) after adjusting by age, year of sampling, and prepregnancy BMI (Glynn et al. 2007).
By year of age the sample consisted of 114 participants aged 4 years, 1181 1581 per year between 5 and 16 years, and 715 950 per year between 17 and 23 years.
The expression of other genes was influenced by other variables, including year of sampling (reflecting different thermal conditions), sampling method and lake of origin.
Plant characteristics are summarized by elevational zone and sampling year with each combination denoted by the zone (BTM, MID, TOP, and UPL) subscripted by the last two digits of the year of sampling (2001 and 2002).
The analysis reported in figure 2 showed that the change of anti-HEV IgG prevalence throughout the period could be, at best, described by a multivariate logistic model which included year of sampling as a cubic term, modelling the variations of prevalence as a fluctuation with a period of about 3 years (p=0.032).
We matched four women who did not have a diagnosis of venous thromboembolism to each case by using risk set sampling, by year of birth and the index date of the case (calendar time).
From the reference population a representative sample of 550 dogs were selected for by random sampling stratified by year of birth.
Estimating equation (1) by year of arrival for just the sample of "refugees" produces results very similar to those in Table 4. OLS estimates of agricultural workers' wages on the minimum wage.
