The phrase "additional level of education" is correct and usable in written English.
You can use it when discussing qualifications, training, or further studies that enhance someone's knowledge or skills.
Example: "To qualify for the position, candidates must have an additional level of education beyond a bachelor's degree."
Alternatives: "extra degree of education" or "supplementary level of education".
If aspiring opticians suddenly have to complete additional levels of education, pay fees, and pass exams to get licensed, it's more expensive to enter the profession.
Conversely, among boys there was an average reduction of 0.029 (95% CI: 0.009 0.050) in the odds of alcohol-related behavioural problems for each additional level of maternal education, with no association apparent in girls (Fig. 1b).
Inclusion of additional determinants (level of education, marital status, living arrangements and household wealth quintiles) showed that up to 82% of the sex difference in the mean health score in Agincourt was attributable to the distribution of the determinants between the two groups, with a remaining 18% attributable to other factors not included in the model.
Multivariate analysis confirmed in most cases the previous findings and added additional correlations for level of education (visiting and intimacy) and marital status (comfort and visiting).
In order to assess the feasibility and acceptability of computer-based questionnaires, the participants filled in an additional questionnaire regarding level of education, previous computer experience, and method preferences.
In another study [ 21], which provided both univariate and multivariate OR with 95% CI, we selected the data derived from multivariate analysis because univariate OR and 95% CI were obtained by conditional logistic regression analysis, whereas multivariate OR and 95% CI were obtained after controlling for many additional factors, including level of education and tobacco use.
Payments are also made when that young person enters education or employment, when additional levels of qualifications are gained, or volunteering and employment is maintained over an increasing number of months.
