We assessed A level results through self report questionnaire. The mean age of respondents was 18 years and 8 months; for simplicity we refer to this as age 19 years. Participants were classified according to whether or not they had achieved three or more A level qualifications. Participants were also asked about current enrolment in education or training and current employment status. We combined responses to these two items to identify those not in education, employment, or training (NEET). In line with the definition used by the Office for National Statistics,34 participants who were not in full time or part time education or in training were classified as NEET if they were unemployed or otherwise economically inactive (not in employment but not actively seeking work). Fifty six per cent of those with information on self harm with and without suicidal intent at age 16 years returned the questionnaire at age 19 years (n=2707/4799).
