The phrase "age of introduction" is correct and usable in written English.
It can be used to refer to the period or stage at which something is first introduced or made available, often in the context of products, technologies, or ideas.
Example: "The age of introduction for smartphones marked a significant shift in how we communicate and access information."
Alternatives: "era of launch" or "period of debut".
To assess the prevalence of breastfeeding and formula feeding, the age of introduction to specific foods, and the types of foods and beverages consumed by Hispanic infants and toddlers compared with similarly aged non-Hispanic infants and toddlers living in the United States.
Potential mediators of the association of postpartum depression with height were breastfeeding duration, age of introduction of solid foods, and depression at 1 year postpartum.
We found no evidence for mediation by duration of breastfeeding or age of introduction of solid foods, nor any evidence for reverse causation.
The mean age of introduction of any solid foods in this population was 5.2±1.5 months (Table 1) although as we have previously reported the introduction of teas and water occurred much earlier [18].
Potential mediators of the effect of antenatal depression were gestational age at birth, birthweight for gestational age,[46] breastfeeding duration, age of introduction of solid foods, and maternal depression at 6 months and 1 year postpartum.
There was no evidence for mediation by breastfeeding duration or age of introduction of solid foods, though longer duration of breastfeeding was an independent predictor of reduced HAZ and leg length.
Even in case this disease is manifests during adolescence of adulthood, the initiation of the disease process conceivably occurred before the age of alcohol introduction.
32 33 34 This lack of association was corroborated by two multicenter randomized clinical trials in 2014, which found no link between age of gluten introduction, ongoing breast feeding, and the development of celiac disease.
Several recent large prospective studies have reinforced the importance of HLA-DQ2.5 for CD development in childhood, with environmental factors such as age of gluten introduction or breastfeeding having little, if any, impact on the proportion of children who ultimately develop CD [ 25, 26, 51].
Similarly a recent West Australian study found the median infant age for introduction of CF was four months, with 93%% of the cohort having received CFs by six months of age [ 14].
