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The present meta-analysis was to evaluate the relationship between age at first birth and pancreatic cancer in women.
We examine the relationship between age at first birth, completed parity, and post-reproductive mortality and address the potential confounding role of family of origin.
Sexual age was defined as time interval in years between age at first sexual contact and current age.
We found a marginally statistically significant positive association between age at first full-term pregnancy and risk of overall B-cell NHL and diffuse large B-cell lymphoma, with some suggestion for increased follicular lymphoma risk, but not CLL/SLL.
Most studies did not find a statistically significant association between age at first full-term pregnancy and NHL risk overall, although some indicated that the highest-risk group was women who had a first full-term pregnancy between ages 25 to 30 [10] [12]–[14], [14].
The data indicated no association between age at first smoking exposure and endometrial cancer.
Similar(17)
The only other association between a reproductive factor and hormone level among parous women was the borderline significant negative association between testosterone and age-at-first birth between ages 20 and 29 (compared to birth before age 20).
Alcohol use was derived from these questions: "How often do you drink?" "How much do you drink when you drink?" and "How often do you drink at least six drinks in one day?" Duration of smoking was calculated as the difference between age at the first cigarette and age at last cigarette.
So far, meta analyses of these studies indicate no consistent or significant associations between postmenopausal breast density and age-at-first birth, breast feeding, or other reproductive characteristics (after adjustment for age and BMI) other than parity [10].
To assess differences between child age at first parental concern and age at first parental discussion of concerns with a health care provider among children with autism spectrum disorder (ASD) vs those with intellectual disability/developmental delay (ID/DD), and to assess whether provider response to parental concerns is associated with delays in ASD diagnosis.
In a study comparing demographic, epidemiological, and medical data, Dmowski et al. [37] noted that in the pelvic pain group, there was a negative correlation between the age at first symptom and the stage of endometriosis at the time of first diagnosis.
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