The parent's response to the questionnaire also provided information regarding parental farm exposures, maternal smoking during pregnancy, household exposure to tobacco smoke, parental education, and household income.
2 Parental professional farming was defined if the participant's mother, father or both were classified as professional farmers.
Weidner et al. (1999) reported nonsignificant associations between hypospadias and parental occupation in farming or gardening.
At the highest pH levels (5.7 7.0), all hybrids generally performed equally well to parental populations (TUSK, FARM) (Fig. 3; Table 1).
In similar studies with Atlantic salmon, lower survival of hybrid and backcross offspring between farm (domesticated) and wild fish relative to wild fish has been observed (McGinnity et al. 2003), although in these studies the pure farm parental cross also had reduced survival relative to the wild fish (differing from the present results).
In the present study, parental occupation in the farming and gardening industry among 6,177 cases of cryptorchidism, 1,345 cases of hypospadias, and 23,273 controls, born live from 1983 to 1992 in Denmark, was investigated in a register-based case-control study.
41 A Swiss study of children aged from 6 to 15 years living in rural communities also showed that after adjustment for potential covariates, farming as parental occupation was significantly associated with lower rates of sneezing attacks during the pollen season (adjusted OR 0.34, 95% CI 0.12 0.89) and atopic sensitization (adjusted OR 0.31, 95% CI 0.13 0.73).
We also examined whether CBT– PON1 risk estimates varied by reported home pesticide treatment, farm residence, or parental agricultural occupation, potential indicators of exposure to OPs metabolized by PON1.
Our ability to examine the CBT– PON1 relation by farm residence or parental agricultural occupation was quite limited, although there was a higher frequency of PON1-108TT camongamong children who had lived on a farm (4 of 6 cases, 0 of 4 controls).
Assignments of simulated hybrid classes using STRUCTURE correctly identified all the farm and wild parental fish with a minimum q threshold value of 0.85 (wild mean q = 0.88, 95% CI = 0.85 0.91; farm mean q = 0.88, 95% CI = 0.86 0.92), and this was therefore the threshold value used for hybrid identification in STRUCTURE and TESS analyses.
