TY - JOUR T1 - Smoking pack years calculator JF - British Journal of General Practice JO - Br J Gen Pract SP - 230 LP - 230 DO - 10.3399/bjgp20X709553 VL - 70 IS - 694 AU - Nigel J Masters Y1 - 2020/05/01 UR - http://bjgp.org/content/70/694/230.2.abstract N2 - Clinical scoring systems have their limitations but they do create numbers that can be searched by computers or provide thresholds for clinical action. An example could be body mass index rather than … ER -