Lifestyle factors

 The incidence of lung cancer is specifically correlated with smoking.

 The most consistent finding, over decades of research, is the strong association between tobacco use and cancers of many sites. Hundreds of epidemiological studies have confirmed this association. The affirmation it is also sustained by fact that lung cancer death rates in the United States was associated with the variations of percentage of people who were smoking. The percentage was increasing and also the incidence of lung cancer was increasing. This was followed by the increase of death rates because if lung cancer. Most recently, in USA, the percentage of people who is smoking decreased. Some people, especially men, understood the negative effect of smoking. Lifestyle choices cause cancer: tobacco, diet, exercise, alcohol, tanning choices, and certain sexually transmitted diseases are the major risks. Most cancers are related to known lifestyle factors.

 There is also a research that correlates cancer incidence with the lower levels of melatonin produced in the body when people spend more time in bright-light conditions.

People who sleep fewer hours and people who work at night represent two groups that are known to have higher risks in getting ill.

Common Cancer Types

   The most common cancer types are:

-             Bladder Cancer

-             Breast Cancer

-             Colon and Rectal Cancer (colorectal cancer)

-             Endometrial Cancer

-             Kidney (Renal Cell) Cancer

-             Leukemia

-             Skin Cancer: non-melanoma and melanoma

-             Thyroid Cancer

 The list of common cancer types includes cancers that are diagnosed with the greatest frequency. The most common type of cancer on the list is skin cancer.

The cancer type on the list with the lowest incidence is thyroid cancer.

Because colon and rectal cancers are often referred to as "colorectal cancers," these two cancer types were combined for the list.

Kidney cancers can be divided into two major groups, renal parenchyma cancers and renal pelvis cancers.