derek holland has ben sentenced to three—and—a—half years in prison and disqualified for driving forand high—risk drinking. the study was published in the journal bmc public health. professor george ploubidis is from university college london's centre for longitudinal studies. he contributed to the study. hejoins me now. professor, thank you for your time joining us on bbc new us. so, just to give our viewers an idea of the scope of this study, it is looking at a cohort of adults born in 1970s is that right?— in 1970s is that right? correct. good morning, _ in 1970s is that right? correct. good morning, thank - in 1970s is that right? correct. good morning, thank you - in 1970s is that right? correct. good morning, thank you for i in 1970s is that right? correct. - good morning, thank you for having me, that study based on the well—known british 1970 birth cohort. it's a study following the lives of ability 17,000 individuals born in 1970. this data comes from the survey and when the cohort was aged 46—48. the finding is about a third of our participants, a representative sample of t