Where your DNA places you among other people, and the studies behind it.
Not tailored to your result, and not medical advice
Quit Smoking and Stay Stopped: Tobacco smoke is the largest single modifiable driver of the airflow limitation that defines COPD. In the Lung Health Study, 3,818 smokers with mild to moderate airflow limitation were followed for five years: those who quit and stayed off cigarettes gained on average 47 ml of FEV1 in the year after quitting, then lost about 31 ml a year, roughly half the 62 ml a year lost by those who kept smoking. The benefit came from sustained abstinence rather than a one-off attempt. Quitting slows the loss of lung function, it does not restore what has already been lost. Am J Respir Crit Care Med (PubMed)
Reduce Dust and Fume Exposure: A 2022 Respirology review of occupational COPD reports that workplace exposure to vapours, gases, dusts and fumes carries a population attributable fraction of about 14% of COPD, rising to about 31% when only non-smokers are considered. The exposures with the strongest evidence include inorganic dusts such as coal and silica, organic dust in farming, welding fume, textile and cement dust, and irritant cleaning agents. The same logic applies to hobby exposures such as sanding, soldering, and open wood smoke. Respirology (PMC)
Keep Up Regular Physical Activity: In 6,790 adults from the Copenhagen City Heart Study, assessed in 1981 to 1983 and followed to 1991 to 1994, smokers who reported moderate or high leisure-time physical activity lost less lung function each year than the least active smokers, a relative difference of 2.6 and 4.8 ml/yr of FEV1 (p for trend 0.006). The same groups had lower odds of developing COPD, an odds ratio of 0.77 against the low-activity group (p = 0.027). This is observational, so activity may partly be a marker of better underlying health rather than purely a cause, and it does not substitute for stopping smoking. Am J Respir Crit Care Med (PubMed)
Favor Plants Over Processed Meat: A systematic review of 89 studies in Nutrition Reviews found very strong evidence that fruit and vegetable consumption is associated with lower COPD risk, and very strong evidence that higher processed meat consumption is associated with worse pulmonary function. Dietary fiber intake was associated with a roughly 30% lower long-term risk of developing COPD, particularly fiber from fruit and cereals, and adherence to a prudent or Mediterranean-style pattern was associated with lower risk while a Western-style pattern was associated with higher risk. The same review called the evidence on alcohol inconsistent overall, though heavy drinking at or above 350 g a week was associated with faster FEV1 decline over five years. These are dietary associations from observational data, not demonstrated cures. Nutrition Reviews (PMC)
Know the Limits of Prevention: Behavior does not explain all of this condition. A review of the early origins of COPD notes that around 30% of cases cannot be prevented by smoking avoidance at all. Lung function climbs to a plateau at roughly 20 to 25 years of age, and lung function measured at birth and in the preschool years predicts that peak, so prematurity, prenatal smoke exposure, and early childhood wheeze and infection shape adult risk long before adult habits apply, with wheezy bronchitis and childhood asthma significantly associated with COPD at ages 60 to 65. Adult behavior mostly changes the rate of later decline rather than the starting point, and breathlessness or a cough that persists is worth raising with a clinician. Int J Environ Res Public Health (PMC)
How much of this is genetic?
Genetics explains 50% of why people differ in this trait. The rest is environment, daily habits and chance.
Heritability estimate: Nationwide twin studies estimate COPD susceptibility heritability near 50% (with older estimates up to ~60%); FEV1/FVC lung-function heritability is also about 50%
Background and further reading
Chronic obstructive pulmonary disease (COPD) is a common, progressive lung condition characterized by persistent airflow limitation that is not fully reversible. It is an umbrella term that includes emphysema (destruction of the air sacs) and chronic bronchitis (long-term cough with mucus). Symptoms typically develop gradually over years and include breathlessness on exertion, chronic cough, wheezing, and frequent chest infections. COPD is one of the leading causes of death and disability worldwide, affecting an estimated several hundred million people. It is diagnosed with spirometry, a breathing test that measures how much and how fast air can be exhaled.
Genetic Basis: Twin and family studies place the heritability of COPD susceptibility at roughly 50%, meaning inherited factors and environmental exposures contribute in comparable measure, though smoking remains the single largest modifiable driver. The best-established genetic contributor is the SERPINA1 gene: severe deficiency of the alpha-1 antitrypsin protein it encodes is a well-known Mendelian cause of early-onset emphysema, though it accounts for only a small fraction of cases. Beyond this, COPD is highly polygenic. Genome-wide association studies have identified dozens of common risk loci, including HHIP, FAM13A, and the CHRNA3/CHRNA5/IREB2 nicotinic-receptor cluster on chromosome 15 (which also influences smoking behavior), along with many variants that overlap with genes governing normal lung development and airflow.
Environmental Factors: Environmental and behavioral exposures overwhelmingly determine whether COPD develops and how fast it progresses. Cigarette smoking is by far the largest single factor and accounts for the majority of cases in high-income countries. Other important contributors include secondhand smoke, occupational dusts, fumes and chemicals, indoor air pollution from biomass fuels used for cooking and heating, outdoor air pollution, and childhood respiratory infections that impair lung growth. Because lung function peaks in early adulthood and then declines with age, a lower genetic ceiling combined with heavy exposure can bring on symptoms decades earlier. Not smoking, or stopping, is the most powerful way to slow the loss of lung function at any level of genetic predisposition.
The published research behind your score, and the variants it draws on.
6 published scores from 3 studies
The COPD score combines 6 polygenic scores drawn from 3 published studies.
These traits are influenced by some of the same genes and variants as this one
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Content updated August 2026.
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