2 weeks off cigarettes when you quit smoking.. : r/coolguides 20 years of smoking and

The researchers studied data from 34,653 adults enrolled in the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) who were assessed at two time points, three years apart, on substance use, substance use disorders, and related physical and mental disorders

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Some groups are more likely to be harmed by exposure in public places and shared spaces: Babies and children: Higher risk of sudden infant death syndrome (SIDS) More ear infections, asthma attacks, bronchitis, and pneumonia Pregnant people and their babies: Greater chance of low birth weight and pregnancy complications People with asthma, COPD, or heart disease: Smoke can trigger asthma attacks, chest pain, and breathing trouble Older adults: More sensitive to the effects on the heart and lungs Workers in hospitality, casinos, and transportation: Repeated exposure in smokeallowed settings increases health risks Residents of multiunit housing: Smoke can travel through vents, cracks, and hallways, exposing neighbors who do not smoke Consult a Top General Physician The science: how secondhand smoke harms the body

Its a method to put a number on how much a person has smoked over time, and it makes it simpler to compare research subjects and see patterns in the data