The phrase "age of first use" is correct and usable in written English.
It can be used in contexts discussing the initial time or age at which something was first utilized or experienced.
Example: "The age of first use for smartphones among teenagers has significantly decreased over the past decade."
Alternatives: "initial usage age" or "first usage age".
Age of first use was similar across study sites.
The average age of first use is 12. "I'd soak a sock with hairspray," the book quotes one teenager, "put it over my face, and breathe deep.
This study compares lifetime prevalence and age of first use (onset) for alcohol, cannabis, and other drugs in six international sites.
Forty or fifty years ago heroin addicts were overwhelmingly male, disproportionately black, and very young (the average age of first use was 16).
Drug officials say that New Jersey does not have a particularly bad Ecstasy problem, though the age of first use has been dropping, but say that the database is a proactive measure.
Results indicated that the prevalence of substance abuse by age 26 was 26% (self-reports or criminal justice system records) with a median age of first use of 17. Probit regression analysis indicated that substance abuse prevalence was primarily determined by gender (males had a higher rate), trouble-making behavior by age 12, school mobility, and previous substance use.
In addition, we matched both biologics and comparator groups for age, gender, propensity score, date of first use of DMARDs, and date of first use of biologics.
Individuals reporting more illicit drug use and younger ages of first use tend to discount the value of future hypothetical rewards more steeply than their peers.
162 CHR and 105 control participants were assessed on cannabis use severity, frequency, and age at onset of first use as part of the North American Prodrome Longitudinal Study and completed resting-state fMRI scans.
For male participants, the self-reported 'age of first use' for each substance was as follows: (i) alcohol=14.6±2.4 years (N=456); (ii) nicotine=14.0±2.6 years (N=385); and (iii) cannabis=14.8±2.9 years (N=127).
Discounting values were significantly associated with a number of substance use variables, most notably age of first alcohol use (r=-.34; P<.05), age of first smoking (r=-.51; P<.05), age of first marijuana use (r=-.48; P<.05), number of times "passed out" from alcohol use (r=.73; P<.01), and total number of illicit drugs used (r=.32; P<.05).
