“…This involved the completion of a study questionnaire and participation in a medical examination, both of which have been described in detail elsewhere. 8 In brief, the questionnaire included enquiries regarding civil service employment grade (an indicator of socio-economic position), 12 smoking habits, 13 intermittent claudication, 14 angina, 15,16 chronic bronchitis, 17 marital status, 18 physical activity, 19 unexplained weight loss in the preceding year and the use of drug therapy for heart problem or high blood pressure. 8 Forced expiratory volume in one second (FEV 1 ) adjusted for height, 20 ischaemia, 21 fasting plasma cholesterol, 22 postchallenge 2-h blood glucose, 23 blood pressure, 24 and triceps skinfold thickness 8 were determined using standardised protocols.…”