pack-years

pack-years

Medtalk A crude indicator of a person's cumulative cigarette consumption, equal to the number of packs of cigarettes smoked/day, multiplied by yrs of consumption. See Smoking, Tobacco.
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Compared with people who never smoked, those who had smoked for more than 40 pack-years had a four times higher risk of PAD and roughly twice the risk of coronary heart disease and stroke.
The researchers found that the five-year cumulative incidence of persistence was 12.2, 21.9, and 37.8 percent, respectively, for nonsmokers, smokers of one to 20 pack-years, and smokers of more than 20 pack-years.
Slightly more than 60% of them were never smokers; 8.7% had a history of low smoking exposure, defined as less than 5 pack-years; 5.8% had a medium smoking history of 5-10 pack-years; 15% had a high smoking history, with more than 10 pack-years; and the smoking history of 10% of the patients was unrecorded.
Guidelines from the American Cancer Society recommend annual lung cancer screening for people ages 55 to 74 in good health with a smoking history of at least 30 pack-years (such as one pack a day for 30 years or two packs a day for 15 years) and who still smoke or have quit within the past 15 years.
There was a positive correlation between PH, P02, pack-years, FEV and the presence of COPD, but there was no significant correlation between sNSE, PCO2 and the presence of COPD
Everyone smoked currently (91%) or in the past for a median of 30 years and a median of 30 pack-years. While 13% had a history of COPD, 5% reported asbestos exposure.
All study participants were heavy smokers: they smoked at least 20 pack-years. Twenty pack-years means, for example, smoking 2 packs daily for 10 years (2 x 10 = 20) or smoking 1 pack daily for 20 years (1 x 20 = 20).
Study also revealed that the accelerated lungs function decline in the women working as cleaners was 'comparable to smoking somewhat less than 20 pack-years.'
Oelsner said this decline is comparable "to a 10-year increment in pack-years of smoking."
"Patients ages 55 to 74 with at least 30 pack-years of tobacco smoking history (one pack-year = smoking one pack per day) who have undergone counseling as to the potential benefits and harms of screening should have a yearly LDCT," says Dr.
For farmers, rate ratios were adjusted for age at enrollment (< 55, 55-59, 60-64, 65-69, 70-74, [greater than or equal to] 75 years), pack-years of cigarette smoking (nonsmokers, < 20, 20-39, 40-59, [greater than or equal to] 60, unknown), level of education (beyond high school, high school, above high school, unknown), state (North Carolina, Iowa), race (white, other than white), and potential exposure to endotoxins (no animals or grain exposure, exposure to animals or stored grain but not both, exposure to both animals and stored grain).
According to the firm, the verdict in Donovan v Philip Morris USA concluded a 10-year old case being pursued on behalf of all Massachusetts smokers of Philip Morris USA cigarettes who have smoked for 20 pack-years. Sullivan joined the team as lead counsel in 2012, after the class had been certified.