Physical assessment of 30 chronic cannabis users and 30 matched controls

Ann N Y Acad Sci. 1976;282:162-7. doi: 10.1111/j.1749-6632.1976.tb49895.x.


Ganja is used extensively in the working-class population of Jamaica, particularly in certain agricultural and fishing communities. Ganja, smoking is illegal but can be accepted as part of the culture in these areas. Sixty male subjects were chosen for assessment, 30 chronic smokers and 30 controls from comparable social, economic, and cultural backgrounds, and were matched for height and age. A chronic smoker had somked a minimum of three spliffs per day for a minimum of 10 years. The subjects were admitted to the hospital for 1 week for psychologic and physical assessment. The physical assessment included a detailed medical history and examination, heart and lung radiography, electrocardiograms, respiratory, liver, and renal function tests, hematology, treponemal serology, and chromosomal studies. No significant physical abnormalities were found, except in two smokers, and there was no reason to suspect that these disabilities were related to ganja. No significant differences between the two groups were demonstrated in the wide range of tests administered.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Blood Cell Count
  • Cannabis*
  • Chromosomes / drug effects
  • Electroencephalography
  • Health
  • Hemoglobinometry
  • Humans
  • Hydrocortisone / urine
  • Jamaica
  • Liver Function Tests
  • Male
  • Middle Aged
  • Plants, Toxic
  • Respiratory Function Tests
  • Substance-Related Disorders / physiopathology*
  • Thyroid Hormones / blood
  • Tobacco
  • Treponemal Infections / epidemiology


  • Thyroid Hormones
  • Hydrocortisone