3154 healthy young men aged 39-59 from the San Francisco area were assessed for their personality type. All were free from coronary heart disease at the start of the research. Eight and a half years later change in this situation was recorded.



A data frame with 3154 observations on the following 13 variables.

  • id Subject ID

  • age Age: age in years

  • height Height: height in inches

  • weight Weight: weight in pounds

  • sbp Systolic blood pressure: mmHg

  • dbp Diastolic blood pressure: mmHg

  • chol Cholesterol: mg/100 ml

  • personalityPersonality type/Behavior pattern: a factor with levels A1, A2, B3, B4

  • personality_2L Dichotomous personality type / behavior pattern: A = aggressive; B = passive

  • ncigs0 Smoking: Cigarettes/day

  • smoking Smoking: No, Yes

  • arcus0 Corneal arcus: No, Yes

  • chd Coronary heart disease event: No Yes

  • typechd coronary heart disease is a factor with levels No, MI_SD (MI or sudden death), Silent_MI, Angina

  • timechd Observation (follow up) time: Days


Statistics for Epidemiology by N. Jewell (2004)


The WCGS began in 1960 with 3,524 male volunteers who were employed by 11 California companies. Subjects were 39 to 59 years old and free of heart disease as determined by electrocardiogram. After the initial screening, the study population dropped to 3,154 and the number of companies to 10 because of various exclusions. The cohort comprised both blue- and white-collar employees. At baseline the following information was collected: socio-demographic including age, education, marital status, income, occupation; physical and physiological including height, weight, blood pressure, electrocardiogram, and corneal arcus; biochemical including cholesterol and lipoprotein fractions; medical and family history and use of medications; behavioral data including Type A interview, smoking, exercise, and alcohol use. Later surveys added data on anthropometry, triglycerides, Jenkins Activity Survey, and caffeine use. Average follow-up continued for 8.5 years with repeat examinations


Coronary Heart Disease in the Western Collaborative Group Study Final Follow-up Experience of 8 1/2 Years Ray H. Rosenman, MD; Richard J. Brand, PhD; C. David Jenkins, PhD; Meyer Friedman, MD; Reuben Straus, MD; Moses Wurm, MD JAMA. 1975;233(8):872-877. doi:10.1001/jama.1975.03260080034016.