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A pack-year is a clinical quantification of cigarette smoking used to measure a person's exposure to tobacco. This is used to assess their risk of developing lung cancer or other pathologies related to tobacco use. However, it is difficult to rely on the assessment based on the pack-year due to the different nature of the packaging by different companies.
The pack-year is a unit for measuring the amount a person has smoked over a long period of time. It is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked. For example, 1 pack-year is equal to smoking 20 cigarettes (1 pack) per day for 1 year, or 40 cigarettes per day for half a year, and so on. [1]
One pack-year is the equivalent of 365.24 packs of cigarettes or 7,305 cigarettes, in a year as smoker.
Number of pack-years = (packs smoked per day) × (years as a smoker)
or
Number of pack-years = (number of cigarettes smoked per day/20) × number of years smoked. (1 pack has 20 cigarettes in some countries)
Note that despite the unit being called a "pack-year," the actual unit is simply a number of packs (as noted above).
For example: a person who has smoked 15 cigarettes a day for 40 years has a (15/20) x 40 = 30 pack-year smoking history.
One pack-year is smoking 20 cigarettes a day for one year. If someone has smoked 10 cigarettes a day for 6 years they would have a 3 pack-year history. Someone who has smoked 40 cigarettes (2 packs) daily for 20 years has a 40 pack-year history.
Quantification of pack-years smoked is important in clinical care, where degree of tobacco exposure is correlated to risk of disease such as lung cancer [2] and heart disease. [3]
A cigar is a rolled bundle of dried and fermented tobacco leaves made to be smoked. Cigars are produced in a variety of sizes and shapes. Since the 20th century, almost all cigars are made of three distinct components: the filler, the binder leaf which holds the filler together, and a wrapper leaf, which is often the highest quality leaf used. Often there will be a cigar band printed with the cigar manufacturer's logo. Modern cigars often come with two bands, especially Cuban cigar bands, showing Limited Edition bands displaying the year of production.
A cigarette is a narrow cylinder containing burnable material, typically tobacco, that is rolled into thin paper for smoking. The cigarette is ignited at one end, causing it to smolder; the resulting smoke is orally inhaled via the opposite end. Cigarette smoking is the most common method of tobacco consumption. Manufacturers have described the cigarette as "a drug administration system for the delivery of nicotine in acceptable and attractive form." The term cigarette, as commonly used, refers to a tobacco cigarette, but the word is sometimes used to refer to other substances, such as a cannabis (Jazz) cigarette or an herbal cigarette. A cigarette is distinguished from a cigar by its usually smaller size, use of processed leaf, and paper wrapping, which is typically white. A cigarette may be called a fag in British slang. Many other terms are used for cigarettes, including cigs, ciggies, smokes, stogs, boges, and tabs.
Tobacco smoke is a sooty aerosol produced by the incomplete combustion of tobacco during the smoking of cigarettes and other tobacco products. Temperatures in burning cigarettes range from about 400 °C between puffs to about 900 °C during a puff. During the burning of the cigarette tobacco, thousands of chemical substances are generated by combustion, distillation, pyrolysis and pyrosynthesis. Tobacco smoke is used as a fumigant and inhalant.
Tobacco smoking is the practice of burning tobacco and ingesting the smoke that is produced. The smoke may be inhaled, as is done with cigarettes, or simply released from the mouth, as is generally done with pipes and cigars. The practice is believed to have begun as early as 5000–3000 BC in Mesoamerica and South America. Tobacco was introduced to Eurasia in the late 17th century by European colonists, where it followed common trade routes. The practice encountered criticism from its first import into the Western world onwards but embedded itself in certain strata of a number of societies before becoming widespread upon the introduction of automated cigarette-rolling apparatus.
Tobacco package warning messages are warning messages that appear on the packaging of cigarettes and other tobacco products concerning their health effects. They have been implemented in an effort to enhance the public's awareness of the harmful effects of smoking. In general, warnings used in different countries try to emphasize the same messages. Warnings for some countries are listed below. Such warnings have been required in tobacco advertising for many years, with the earliest mandatory warning labels implemented in Iceland in 1969. Implementing tobacco warning labels has been strongly opposed by the tobacco industry, most notably in Australia following the implementation of plain packaging laws.
The Comprehensive Smoking Education Act of 1984 is an act of the Congress of the United States. A national program established in order to improve the availability of information on health risks related to smoking, to amend the Federal Cigarette Labeling and Advertising Act so that cigarette warning labels would be different, and for other reasons, the Comprehensive Smoking Education Act was enacted with a purpose to, as stated in Section 1 of the Act, "provide a new strategy for making Americans more aware of any adverse health effects of smoking, to assure the timely and widespread dissemination of research findings and to enable individuals to make informed decisions about smoking". Adopted by Congress in 1984 and effective October 12, 1984, the Comprehensive Smoking Education Act created a rotational warning system that required all cigarette packages and advertisements to rotate the following four warnings every three months:
Tobacco use has predominantly negative effects on human health and concern about health effects of tobacco has a long history. Research has focused primarily on cigarette tobacco smoking.
Prevalence of tobacco use is reported by the World Health Organization (WHO), which focuses on cigarette smoking due to reported data limitations. Smoking has therefore been studied more extensively than any other form of consumption.
Smoking is a practice in which a substance is burned and the resulting smoke is breathed in to be tasted and absorbed into the bloodstream. Most commonly, the substance used is the dried leaves of the tobacco plant, which have been rolled into a small rectangle of rolling paper to create a small, round cylinder called a "cigarette". Smoking is primarily practised as a route of administration for recreational drug use because the combustion of the dried plant leaves vaporizes and delivers active substances into the lungs where they are rapidly absorbed into the bloodstream and reach bodily tissue. In the case of cigarette smoking these substances are contained in a mixture of aerosol particles and gases and include the pharmacologically active alkaloid nicotine; the vaporization creates heated aerosol and gas into a form that allows inhalation and deep penetration into the lungs where absorption into the bloodstream of the active substances occurs. In some cultures, smoking is also carried out as a part of various rituals, where participants use it to help induce trance-like states that, they believe, can lead them to spiritual enlightenment.
Health in Israel is generally considered good.
This is a list of countries by tobacco consumption and cigarette consumption per capita.
Cigarette smoking has serious health effects. In the "General health effects" and the "Unique gender differences and health effects for women" sections, this article gives specific statistics on the health effects on women and in general.
Smoking in Iceland is banned in restaurants, cafés, bars and night clubs as of June 2007. A large majority of Icelanders approve of the ban. At the time the ban went into effect, almost one in four Icelandic people were smokers.
Smoking in Malaysia was first dealt with in legislation requiring a general warning message on all Malaysian cigarette packaging in 1976. Smoking bans in public places started to be implemented in the 1980s. Selling of cigarettes to persons under the age of 18 has been forbidden since May 14, 1994. Tobacco advertising was outlawed in 2003; since January 1995, showing cigarette packaging in advertisements had been forbidden, and print media advertising had been restricted to only one page.
Smoking in South Korea has decreased overall for both men and women in the past decades. However, a high prevalence of tobacco use is still observed, especially with the rise of novel tobacco products like e-cigarettes and heat-not-burn tobacco products. There are socioeconomic inequalities in smoking prevalence according to gender, income, education, and occupational class. Advocates call for measures to reduce the smoking rates and address smoking inequalities using a combination of monitoring and tobacco control policies. These measures include significant price hikes, mandatory warning photos on cigarette packs, advertising bans, financial incentives, medical help for quitting, and complete smoking bans in public places.
In the United Kingdom, smoking is legally permitted, with certain conditions set from laws enacted separately in England, Wales, Scotland and Northern Ireland. It is illegal to smoke tobacco in enclosed public places, such as restaurants, shops or pubs, under the Health Act 2006 for England and Wales, the Smoking Order 2006 for Northern Ireland and the Smoking, Health and Social Care (Scotland) Act 2005 for Scotland. It is also illegal to smoke in a car if one is transporting people under 18 or if a vehicle is being used for work purposes. Smoking is prevalent among a sizeable, but continuously reducing minority of the population. It has been argued that smoking puts considerable strain upon the NHS due to the health problems which can be directly linked with smoking. Successive UK Governments have endeavoured to reduce the prevalence of smoking. As part of this commitment, the NHS currently offers free help to smokers who want to quit.
Tobacco smoking in Pakistan is legal, but under certain circumstances is banned. If calculated on per day basis, 177 million cigarettes per day were consumed in FY-14. According to the Pakistan Demographic Health Survey, 46 per cent men and 5.7 per cent women smoke tobacco. The habit is mostly found in the youth of Pakistan and in farmers, and is thought to be responsible for various health problems and deaths in the country. Smoking produces many health problems in smokers. Pakistan has the highest consumption of tobacco in South Asia.
Tobacco smoking in the Philippines affects a sizable minority of the population. According to a 2009 survey conducted under the auspices of the Philippines' Department of Health, Philippine Statistics Authority, the World Health Organization, and the United States Centers for Disease Control and Prevention, 28.3 percent of the population are "current tobacco smokers". This figures represents 17.3 million of 61.3 million adult Filipinos.
Tobacco smoking is popular in North Korea and culturally acceptable, at least for men. As of 2014, some 45% of men are reported to smoke daily, whilst in contrast only 2.5% of women smoke daily, with most of these being older women from rural areas. Smoking is a leading cause of death in North Korea, and as of 2010 mortality figures indicate that 34% of men and 22% of women die due to smoking-related causes, the highest mortality figures in the world. There are tobacco control programs in North Korea, and although smoking was not prohibited in all public spaces, the smoking rates have declined since their peak in the 2000s.
The 1950 Wynder and Graham Study was conducted by Ernest Wynder and Evarts Graham and was entitled "Tobacco Smoking as a Possible Etiologic Factor in Bronchiogenic Carcinoma: A Study of Six Hundred and Eighty-Four [684] Proved Cases". It was published on May 27, 1950. It was a case-control study to determine the relationship between various external factors and the development of bronchogenic carcinoma. The study concluded that long-term tobacco usage contributes to the onset of lung cancer, as an overwhelming majority (96.5%) of the men with the disease were classified as moderate to heavy smokers for an extended period of time, compared to a lower percentage of the general hospital population control group.
