The researchers conducted a detailed study to understand the trend of lung cancer incidences in the US. The survey found a decline in the rates of pulmonary cancer, varied on several factors including race, gender, age and ethnicity.
The study was carried by a research team from the National Cancer Institute (NCI) and led by Dr. Denise Lewis.
The American Lung Association (ALA) report has showed that lung cancer was alone responsible for taking lives in the United States against the breast, colorectal and pancreatic cancer combined.
Experts say an estimated 159,260 people will die in America in 2014 due to lung cancer. It means the lung ailment will claim 27 percent of all cancer deaths.
Prior to the study, researchers were of the opinion that the incidence rates of lung cancer were declining across the United States. There was also little information regarding the trends about the different cancer subtypes including squamous and small cell carcinomas.
In this new study, Dr. Lewis and her research fellows made an attempt to derive a clear idea about the state of lung cancer in the United States. They believe this clear picture would help the researchers in better understanding the lung cancer trend and its monitoring among the population affected with the disease.
The research team analyzed data collected as part of the Surveillance, Epidemiology, and End Results (SEER) program, a source of population-based information that provides comprehensive data on cancer incidence and survival.
The aim of the study was to bring the classification of lung cancer subtypes up to date, as well as discovering the specific rates of the subtypes among different ethnic groups. Specifically, they examined the rates within white and black people in the US diagnosed from 1977-2010, and non-white Hispanic people, Asian/Pacific Islanders and white Hispanic people diagnosed from 1992-2010.
Findings of the study
- Rates of squamous and small cell carcinomas fallen since 1990s.
- Decline was at a much steeper rate in males than females.
- Unspecified lung cancer rates declined during the same period.
- Adenocarcinomas rates fell in males up until 2005. After this they rose quickly until 2010 among racial, ethnic and gender group.
- Adenocarcinomas rates were higher in young females than males in all demographic groups.
- Ratios of lung cancer rates for males and females fell more among white and black people in comparison to other racial and ethnic groups.
Concluding the study, the research team said that the rates of lung cancer vary by subtype, gender, age, race and ethnicity.
Dr. Lewis says, “It is important to monitor these changes as clinical cancer experts diagnose lung cancer and offer treatment based on specific characteristics of the cancer.”
The study findings were published in the American Cancer Society (ACS) journal CANCER.