tobacco medical abbreviation File:Adverse effects of smoking.png ppd, means pack per day.
ppd, means pack per day. It indicates the smoking intensity of a person. It is better measure than pack years or smoking status for modeling cardiovascular disease outcomes. There are 20 cigarettes in The Effects of Tobacco Use and Surgery Premier Surgical Health effects of smoking tobacco Wikipedia File:Tobacco diagram.png Wikimedia Commons Tobacco Smoke Risks of Tobacco UF Health
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