The phrase "age at first contact" is correct and usable in written English.
It can be used in contexts discussing the age of an individual when they first encounter a particular situation, person, or entity, often in studies related to psychology, sociology, or anthropology.
Example: "The research focused on the age at first contact with technology and its impact on learning outcomes."
Alternatives: "age of initial interaction" or "age at first encounter".
No significant correlation was found between the presence of MOH and age of onset, sex, age at first contact, headache type, pain frequency and severity.
We studied 118 patients looking for correlations between age of onset, sex, age at first contact, headache type, presence of Chronic Daily Headache (CDH), pain frequency, severity and presence of MOH (according to the revised criteria [1]) by Student's t test, Pearson's Chi Square and Mann-Whitney's test were used to analyze data.
Age at first contact was included in the analysis.
Participants' mean age at first contact within psychiatric services was 28.2 years (SD=12.1).
Age at first contact was included in the analysis as a continuous variable.
Participants' age at first contact in psychiatric services predicted their satisfaction (OR=1.02, 95% CI 1.01 to 1.04, p=0.007).
The first contacts with the Roman civilisation were established in the Iron Age.
This study evaluated data from longitudinal panel respondents of the 1994 95 (baseline) and 1996 97 (follow-up) waves of the NPHS to examine inconsistencies in reported mammography utilization among women aged 40+ years at first contact.
It recommends that all HIV exposed infants should be tested by PCR at 6 weeks of age (or at first contact), by an antibody test at 12 months (if PCR negative) and a confirmatory antibody test at 18 months (if a previous antibody test was negative and continued breastfeeding).
We found that as time progressed, children were enrolled in care and treatment services at an older age sicker status as evidenced by increase in mean age and more advanced disease stage at first contact with providers.
The potential coverage by 1 month of age was 54% in 2010, if all children had been BCG vaccinated at first contact with the health system.
