Sentence examples for by age at first from inspiring English sources

We assessed whether bone loss is completely reversible after cessation of IPC use, whether different IPCs have different effects and whether effects vary by age at first use.

To compare utility estimates between tympanostomy tubes (TT) and short-courses of antibiotics in children with recurrent acute otitis media (RAOM) stratified by age at first episode.

We also find statistically significant differences by age at first migration, in which women who first moved by age 20 had significantly higher fertility than women who did not move (Table 7, model 4).

These associations were not modified by age at first admission.

Among parous women, there was no difference in risk by age at first birth (P=0.43).

Smoking-associated risks did not differ notably by age at first birth or previous breast biopsy.

Because two studies have noted higher estrogen levels among women with A2 alleles [ 4, 23], it is possible that women with these genotypes have more lifetime exposure to circulating steroid hormones that is not abrogated by later age at menarche or by earlier age at first full-term pregnancy.

The variations we observed in the expression of the parity signature by ER status are unlikely to have been driven by age, age at first birth or years since most recent birth, because these variables had similar distributions in the ER + and ER - cases evaluated.

We assessed this kind of bias by sensitivity analysis: we checked the robustness of the models by including age at first drink, a factor strongly linked to poor executive function and an individual risk factor for subsequent drinking and drug abuse [ 30].

The presence and type (complete or partial) of PP were assessed by gender, age at first appearance of PP, skeletal maturation stage as determined by the cervical maturation method (CVM), and skeletal malocclusion.

Studies suggest that earlier puberty, as measured by the age at first menstruation, can slightly increase the risk of breast cancer, probably because it results in longer lifetime exposure to the hormones estrogen and progesterone, which can feed some tumors.