This tool cannot determine whether you have cancer. Only a healthcare professional can diagnose cancer through appropriate medical tests.
Lung Cancer Risk & Screening Assessment
Calculate your cumulative cigarette smoking pack-years and assess your eligibility for annual low-dose computed tomography (LDCT) lung screening. Risk estimate is not a diagnosis.
What Is a Lung Cancer Risk & Screening Assessment?
A Lung Cancer Risk & Screening Assessment is an educational risk evaluation tool designed to help individuals assess statistical risk factors associated with cancer incidence based on validated epidemiological models. It calculates estimated probabilities from personal factors such as age, lifestyle habits, and family history. This tool is intended solely for personal health education and screening awareness; it does not detect, diagnose, or predict cancer in any individual.
How to Use This Calculator
- Input your age in years.
- Enter average number of cigarettes smoked per day and total years of smoking.
- If you have quit, input the number of years since quitting.
- Click 'Calculate Pack-Years & Risk' to verify LDCT screening eligibility.
How This Calculator Works
Applies the USPSTF 2021 clinical criteria: $\text{Pack-Years} = \frac{\text{Cigarettes per day}}{20} \times \text{Years smoked}$. Annual LDCT screening is recommended for adults aged 50–80 who have a $\ge 20$ pack-year smoking history and currently smoke or have quit within the past 15 years.
Understanding Your Results
The calculator outputs your total pack-years and indicates whether you meet USPSTF eligibility criteria for annual low-dose CT chest screening, which significantly reduces lung cancer mortality through early-stage detection.
Frequently Asked Questions
Can this assessment diagnose lung cancer?
No. Risk estimate is not a diagnosis. This tool determines cumulative exposure metrics and clinical screening eligibility. A diagnosis requires high-resolution imaging and tissue biopsy by a medical team.
What is Low-Dose Computed Tomography (LDCT)?
LDCT is a painless, non-invasive imaging test that uses a much lower dose of radiation than conventional chest CT scans to detect tiny pulmonary nodules and early-stage tumors.
Does quitting smoking reduce lung cancer risk?
Yes. From the moment you quit, your respiratory tract and cellular repair mechanisms begin recovering. Within 10 to 15 years of smoking cessation, the risk of lung cancer drops by approximately 50% compared to continuing smokers.
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Important Limitations & Medical Disclaimer
Notice: Risk estimate is not a diagnosis. This tool provides statistical risk factors for informational awareness only and cannot diagnose or predict cancer. If you experience persistent cough, hemoptysis (coughing blood), or shortness of breath, consult a pulmonologist immediately.