Main Risk Factors—A General Overview
COPD is a multifactorial disease. In most patients the cause is a combination of several factors that have accumulated over the years. The dominant factor is smoking, but there are also environmental, occupational and genetic factors that affect the risk of developing the disease.
It's important to know: not everyone who smokes will develop COPD, and not every COPD patient smoked. Understanding risk factors helps in early identification of people who should be screened—even if clear symptoms haven't appeared yet.
"Anyone who has smoked for 10 years or more, or has been exposed to dust/fumes at work for a prolonged period, should have spirometry screening at least once every two years after age 40."
— Dr., Senior Pulmonologist
Smoking—The Leading Factor
Smoking is the leading cause of COPD in the Western world. About 80-90% of COPD patients are current or former smokers. The longer the smoking period and the greater the number of cigarettes, the higher the risk of developing the disease.
Passive smoking (exposure to others' smoke) is also a significant risk factor. Research has shown that children who grew up in homes with smoking parents are at increased risk of developing chronic lung disease in adulthood. Additionally, electronic cigarette smoking (vaping) is still being studied but there are concerning signs of long-term lung damage.
Environmental and Occupational Risk Factors
Even people who have never smoked can develop COPD from prolonged exposure to air pollution, dust, and smoke in the workplace or at home. In developing countries, a significant source is cooking and heating with open flame indoors—exposure that particularly affects women.
Genetic Factors—Family History
In a small group of patients, COPD develops primarily because of a genetic factor called alpha-1 antitrypsin deficiency. This is a protein that protects the lungs from damage—when there is a deficiency, the lungs are damaged faster, even without smoking.
If there are family members who were diagnosed with COPD at a relatively young age (before age 50), or if there is a history of lung disease in the family, it's worth consulting a doctor about a simple genetic test for alpha-1 deficiency.
Age and Gender—What's the Connection?
Most COPD patients are diagnosed after age 40, and disease progression accelerates after age 65. The reason is the accumulation of damage over the years, together with the natural decline in lung function in older age.
In the past, most COPD patients were men—today, with the rise in smoking rates among women and environmental exposure, the ratio is balancing. Women tend to suffer more from the disease at an earlier age, and there is research showing they may be more sensitive to the damage of cigarette smoke.
What Can I Do If I'm in a Risk Group?
If you recognize yourself in one of the factors described—smoker, former smoker, exposed to polluted air, or with a family history—the first step is awareness. After age 40, it's worth getting basic spirometry screening to know your baseline, and repeating it once a year or two.
Moreover—quitting smoking is the most important step you can take for lung health, even if you've already been diagnosed. Every day without a cigarette is a real gain. At Linshom, we offer support, professional information and support groups for smoking cessation.