pack-years
Cumulative cigarette exposure
Pack-years is a unit measuring cumulative cigarette consumption, calculated by multiplying packs smoked per day by years of smoking.
Someone who smoked one pack daily for twenty years has a twenty pack-year history; two packs daily for ten years equals the same.
Doctors use pack-years to assess smoking-related health risks: The patient has a forty pack-year smoking history.
Inhaling burning tobacco
- tobaccoDried smoking leaf
- cigarettesPaper-wrapped tobacco for smoking
- quantificationExpressing something numerically
- exposureState of being unprotected
cumulative · dosage · calculation · consumption · history · lifetime · daily · frequency
Of the lungs
- oncologyCancer medicine specialty
- screeningEvaluative selection process
- COPDChronic obstructive pulmonary disease
- emphysemaDamaged lung air sacs
diagnosis · eligibility · spirometry · prognosis · staging · patient · physician · respiratory
Study of disease spread
- cohortGroup sharing circumstances
- studyDeliberate learning effort
- variableProne to fluctuation
- correlationStatistical relationship measure
regression · hazard · mortality · incidence · biomarker · publication · data · questionnaire
smoking
Inhaling burning tobacco
- tobaccoDried smoking leaf
- cigarettesPaper-wrapped tobacco for smoking
- quantificationExpressing something numerically
exposure · cumulative · dosage · calculation · consumption · history · lifetime · daily · frequency · duration
pulmonary
Of the lungs
- oncologyCancer medicine specialty
- screeningEvaluative selection process
- COPDChronic obstructive pulmonary disease
emphysema · diagnosis · eligibility · spirometry · prognosis · staging · patient · physician · respiratory · carcinoma
epidemiology
Study of disease spread
correlation · regression · hazard · mortality · incidence · biomarker · publication · data · questionnaire · self-reported