Prevenir el cancer

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Este espacio únicamente pretende ser informativo, divulgativo y de opinión; y en ningún caso sustituir al criterio médico cualificado, ni sugerir o proporcionar terapias de ningún tipo.
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Dalamar
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Re: Prevenir el cancer

Mensajepor Dalamar » 05 Ene 2015 22:50

Estadisticas sobre fumar: http://www.ncbi.nlm.nih.gov/pubmed/17400948

Average cigarette smoking reduced the total life expectancy by 6.8 years, whereas heavy cigarette smoking reduced the total life expectancy by 8.8 years. The number of total life-years lost due to cigar or pipe smoking was 4.7 years. Moreover, cigarette smoking reduced the number of disease-free life-years by 5.8 years, and cigar or pipe smoking by 5.2 years. Stopping cigarette smoking at age 40 increased the life expectancy by 4.6 years, while the number of disease-free life-years was increased by 3.0 years.


Depende del tiempo que lleves fumando, de cuanto fumes y de cuantos anios lleves sin fumar.

In developed countries as a whole, tobacco is responsible for 24% of all male deaths and 7% of all female deaths: these figures rise to over 40% in men in some countries of central and eastern Europe and to 17% in women in the United States. The average loss of life of smokers is 8 years. Among United Kingdom doctors followed for 40 years, overall death rates in middle age were about three times higher among doctors who smoked cigarettes as among doctors who had never smoked regularly. About half of all regular cigarette smokers will eventually be killed by their habit.

Tobacco now causes one-third of all male deaths in middle age (plus one fifth in old age). Tobacco is a cause of about half of all male cancer deaths in middle age (plus one-third in old age). Of those who start smoking in their teenage years and keep on smoking, about half will be killed by tobacco. Half of these deaths will be in middle age (35-69) and each will lose an average of 20-25 years of non-smoker life expectancy.


Los que fuman desde la adolescencia tienen un 25% de probabilidad de morir entre los 35 y los 69 por causas relacionadas con el tabaco y otro 25% de hacerlo despues! Creo que es basante significativo, ya que no hemos hablado de las otras multiples enfermedades no mortales que tambien causa el tabaco.

Every cigarette a man smokes reduces his life by 11 minutes. Each carton of cigarettes thus represents a day and a half of lost life. Every year a man smokes a pack a day, he shortens his life by almost 2 months.


Source: University of California, Berkeley Wellness Letter, April 2000

There are some 1.1 billion people who smoke on our planet earth. Just less than one-third of all adults in the world smoke regularly. Tobacco deaths will not only occur in old age but will start when smokers are about age 35. Half of those who die from smoking-related causes will die in middle age, each losing about 25 years of life expectancy. More than 95% of the tobacco consumed is in the form of cigarettes. About half of all smokers who undergo lung cancer take up smoking again.


Source: Dying to Quit," a 1998 book by Janet Brigham

Y ojo que yo he sido fumador, bastante poco y de forma intermitente, 6 meses si, 6 meses no, habitualmente mucho los fines de semana paquete o mas por dia de juerga y durante la semana un paquete para toda la semana o menos, en general se puede decir que he fumado durante algo mas de una decada de forma intermitente (efectivos quiza 3 años en total a una media de media cajetilla al dia) y tampoco demasiado dejandolo por completo a los 35, pero antes de los 35, por ejemplo entre los 30 y los 35 fume solo unos 3 o 4 meses sueltos solo socialmente y cosas asi... Yo siempre he tenido facilidad para dejarlo y luego sobre todo por ser muy juerguista para volver, todavia ahora si me tomo unas cuantas copas me fumo un par, lo que pasa es que eso ya lo hago tres o cuatro veces al año. (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2865193/)
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Vigilantexx
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Re: Prevenir el cancer

Mensajepor Vigilantexx » 07 Ene 2015 08:21

Hay unos números que todavía no termino de cuadrar:

1- a grosso modo el cáncer en países desarrollados (de larga esperanza de vida) mata a 1 de 4 personas
2- el cáncer de pulmón es el más común de ellos, aprox 1/3 luego el cáncer de pulmón es el responsable de 1 de cada 10 muertes
Hasta aquí OK

3- por otra parte se dice que el fumador tiene 23 veces más posibilidades de tener cáncer de pulmón que el no fumador
4- no obstante, 1 de cada 5 afectados de cáncer de pulmón (que es de muy alta mortalidad) nunca fumo. Se entiende que 4 de 5 pacientes es o ha sido fumador

Los puntos 3 y 4 no cuadran a no ser que el que nunca fumo aguante peor el cáncer de pulmón que el que si lo hizo (y vive mas tiempo hasta que muere de otra enfermedad)

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Re: Prevenir el cancer

Mensajepor Dalamar » 07 Ene 2015 19:56

La verdad no se si los numeros cuadran o no, pueden ser diferentes estadisticas, etc... Pero te aseguro que buscando la informacion y leyendolo todo se me han puesto los pelos como escarpias, no me acerco a un cigarro nunca mas! Habra a quien le compense tener su vicio el pasar por un cancer y por todas esas enfermedades, o simplemente es adiccion, no es que le compense, pero yo te aseguro que la forma de sentirme bien no es fumando todo lo contrario cuando he fumado me he sentido fatal, lo que pasa es que despues te lo pide el cuerpo y te vuelves a sentir mal... Como uno se siente de la leche es cuando hace bastante deporte constantemente y otro descubrimiento nuevo es la meditacion, tambien ayuda mucho, el sentirte sano y lleno de energia que saltas de la cama por la mañana muriendote de ganas de hacer cosas eso no tiene precio y eso se consigue siendo sano y llevando una vida sana, lo que pasa es que la gente es muy corto-placista para todo y tiene muy poca voluntad, la gente prefiere obetener un poco para gastar que ahorrar y luego tener ese poco mas los intereses/dividendos y hablo tanto en dinero como en salud.

Si la gente prefiriese sus vicios a las consecuencias luego no se lamentaria, pero cuando vienen las consecuencias la gente se lamente y mucho, y eso que no han disfrutado de las consecuencias de ser sanos y sentirse bien, solo del beneficio rapido de ser poco sano.

Y ojo que yo no me considero que lleve vida de libro ni mucho menos, y peor que la he llevado, pero cada vez lo veo mas claro, cada vez soy mas sano, hago mas deporte y veo los resultados y me doy cuenta que es lo preferible con mucha diferencia, los vicios cuanto mas se repiten mas perjudiciales son y menos satisfaccion producen, lo sano es al reves, cuanto mas lo repites mejor te encuentras y mas te enganchas a ello.
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Re: Prevenir el cancer

Mensajepor Dalamar » 17 Dic 2015 20:12

Fuente: http://www.forbes.com/sites/alicegwalto ... e-thought/

But a new study out in Nature suggests that the “bad luck” theory of cancer may not be so accurate after all. A reanalysis of the data suggests that cancer may be much more within our control than we’ve recently been led to believe.

“Many scientists argued against the ‘bad luck’ or ‘random mutation’ theory of cancer but provided no alternative analysis to quantify the contribution of external risk factors,” says study author Yusuf Hannun. “Our paper provides an alternative analysis by applying four distinct analytic approaches.”

The team looked at how stem cells divide in various types of tissue including lung, pancreatic and colon. They figured that tissues with similar patterns of stem cell division would show similar risk for cancer. But this wasn’t the case: intrinsic (genetic) factors, they calculated were only responsible for about 10% of a person’s risk for several types of cancer. And this suggests that something else must be at play besides the genes–external factors–which is responsible for much more of the risk.

They also looked at the molecular “fingerprints” of different types of cancer, and found that the majority of cancers were more a result of molecular changes caused by external factors than internal ones. And this was true for colorectal, lung, bladder and thyroid cancers. It’s simply not very likely that enough random mutations could accrue to produce cancer–external factors must play a central role.

Research has found that people who move from areas with low cancer incidence to areas with high incidence tend to take on the cancer risk of the new area. And this works the other way: Moving from a high-cancer locale to a low-cancer locale can reduce one’s risk of developing cancer. Additionally, cancer has in general risen in recent decades, which the authors say suggests environmental or lifestyle effects might be the bigger culprits than genetic changes.

Overall, the team concludes that just 10-30% of cancers can probably be considered “bad luck” cancers. Which means that a much higher percentage might be considered “lifestyle choice” cancers–results of the activities we engage in (or don’t engage in) every day, and the environments we live in.
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Re: Prevenir el cancer

Mensajepor Dalamar » 21 May 2016 05:59

La mitad de los canceres se pueden prevenir:

Fuente: http://www.nbcnews.com/health/cancer/ha ... ds-n577126

The team at Harvard Medical School calculated that 20 to 40 percent of cancer cases, and half of cancer deaths, could be prevented if people quit smoking, avoided heavy drinking, kept a healthy weight, and got just a half hour a day of moderate exercise.

As many as 40 percent of cancer cases, and half of cancer deaths, come down to things people could easily change, researchers said Thursday.

While Americans often worry about whether chemicals, pollution or other factors out of their control cause cancer, the new analysis shows otherwise: People are firmly in charge of much of their own risk of cancer.

The analysis was simple. They broke the 140,000 people into two groups: those with a healthy lifestyle, and everyone else.

The healthy lifestyle definition was based on a large body of studies that have shown what personal habits are linked with higher or lower risks of cancer.

They include not smoking; drinking no more than one drink a day for women, two drinks a day for men; keeping a healthy weight, defined as body mass index of between a very slender 18.5 and a slightly overweight 27.5; and getting the equivalent of just over an hour of vigorous exercise or two and a half hours of moderate exercise a week.

Heavy drinking raises colon, breast, liver and head and neck cancer rates. Obesity raises the risk of esophageal, colon, pancreatic and other cancers. Smoking causes 80 to 90 percent of lung cancer deaths.

Only about 28,000 of the people qualified as following a healthy lifestyle. When the rates of cancer in their group were compared to rates in the rest of the volunteers, the differences were clear.

The incidence rates of cancer were 463 per 100,000 for women in the "healthy" group, versus 618 per 100,000 for those not meeting the healthy goals. For men, it was 283 per 100,000 who met the healthy lifestyle goals versus 425 among those who did not.
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Re: Prevenir el cancer

Mensajepor Dalamar » 22 May 2016 18:14

Higher levels of leisure-time physical activity were associated with lower risks for 13 types of cancers, according to a new study. Physical inactivity is common, with an estimated 51 percent of people in the United States and 31 percent of people worldwide not meeting recommended physical activity levels. Researchers pooled data from 12 U.S. and European cohorts (groups of study participants) with self-reported physical activity (1987-2004). They analyzed associations of physical activity with the incidence of 26 kinds of cancer. The study included 1.4 million participants and 186,932 cancers were identified during a median of 11 years of follow-up. The authors report that higher levels of physical activity compared to lower levels were associated with lower risks of 13 of 26 cancers. Most of the associations remained regardless of body size or smoking history, according to the article. Overall, a higher level of physical activity was associated with a 7 percent lower risk of total cancer.
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Re: Prevenir el cancer

Mensajepor Dalamar » 27 Ago 2016 19:20

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Re: Prevenir el cancer

Mensajepor Dalamar » 06 Dic 2016 10:25

El riesgo para la salud de fumar no es proporcional a cuanto se fuma... un cigarro al dia es casi tan malo como 10 al dia...

In the study, Inoue-Choi's team tracked data on more than 290,000 older Americans, aged 59 to 82. The investigators wanted to assess the risks of "light" smoking -- defined as 10 or fewer cigarettes a day.

All of the smokers were asked about their smoking habits at nine different points in their lives, beginning with before they turned 15 until after they reached the age of 70.

Compared with people who'd never smoked, those who smoked an average of less than one cigarette a day over their lifetime still had a 64 percent higher risk of dying early. And those who smoked one to 10 cigarettes a day had an 87 percent higher risk, the findings showed.

The researchers also looked at specific causes of death. [b]Compared with never-smokers, the risk of death from lung cancer was nine times higher among those who smoked less than one cigarette a day over their lifetime, and 12 times higher among those who smoked one to 10 cigarettes a day.
[/b]
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Re: Prevenir el cancer

Mensajepor Dalamar » 22 Dic 2016 10:41

Good old aspirin, for example, is quite effective in preventing colon cancer if you take it long enough, reducing the risk by 30 percent after 10 years of daily pills. But for a long time nobody knew why, and because it usually isn’t clear who would benefit and who wouldn’t, it wasn’t widely recommended. Now, a better understanding of the precise effects it has — and a way to test which cancers it will interrupt — makes it possible to do “precision prevention,” predicting who should take aspirin and who shouldn’t. On top of that, two major studies of aspirin that test for the first time whether it lowers the overall death rate are expected to publish in 2017.
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Re: Prevenir el cancer

Mensajepor Dalamar » 22 Dic 2016 10:42

Right now, if everyone scrupulously followed the advice to avoid smoking, stay active, keep out of the sun, and stay lean, we’d cut the rate of cancer deaths by half.
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