L Satyanarayana1, Smita Asthana. 1. Department of Epidemiology and Biostatistics, Institute of Cytology and Preventive Oncology (ICMR), Noida, (Uttar Pradesh), India. labanisn@hotmail.com
Abstract
BACKGROUND: Understanding cancer magnitude, risk and trends will be of help in cancer control programs. AIM: To study trends in cumulative risk up to 64 years of age as lifetime risk of developing major cancers in India during the years 1982 to 2000. DESIGN: Retrospective. SETTING: Secondary sources of cancer-registration data. MATERIALS AND METHODS: Data on age-specific cancer-incidence rates were collected for patients 0-64 years of age of either sex for 10 major cancer sites from the National Cancer Registry Program (NCRP) reports of India from Mumbai, Chennai, Bangalore, Bhopal and Delhi; and Barshi registries for the years 1982 or 1988 to 2000. STATISTICAL ANALYSIS: Cumulative risks computed for lifetime development of cancer. Linear trends were studied using simple linear regressions. RESULTS: The lifetime risk among females for the 10 cancer sites ranged from 0.02 to 3.3% and from 0.04 to 2.4% for the years 1982 and 2000 respectively; whereas among males, it ranged from 0.04 to 0.89% and from 0.05 to 0.95% respectively. Significant (P<0.05) increasing trends were observed for breast, non-Hodgkin's lymphoma (NHL), gallbladder, thyroid and ovary cancers among females; while declining trends were observed for cervix, mouth, stomach, esophagus and tongue cancers. Among males, significant (P<0.05) increasing trends wre observed for NHL and prostate cancer; whereas declining trends were observed for stomach, liver, hypopharynx and tongue cancers. Cancers of mouth and esophagus showed increasing trends (P<0.05) in some regions and declining trends (P<0.05) in some other. CONCLUSION: Significant and higher rates of positive trends in lifetime cancer risks for breast cancer among females and for NHL among both sexes were observed.
BACKGROUND: Understanding cancer magnitude, risk and trends will be of help in cancer control programs. AIM: To study trends in cumulative risk up to 64 years of age as lifetime risk of developing major cancers in India during the years 1982 to 2000. DESIGN: Retrospective. SETTING: Secondary sources of cancer-registration data. MATERIALS AND METHODS: Data on age-specific cancer-incidence rates were collected for patients 0-64 years of age of either sex for 10 major cancer sites from the National Cancer Registry Program (NCRP) reports of India from Mumbai, Chennai, Bangalore, Bhopal and Delhi; and Barshi registries for the years 1982 or 1988 to 2000. STATISTICAL ANALYSIS: Cumulative risks computed for lifetime development of cancer. Linear trends were studied using simple linear regressions. RESULTS: The lifetime risk among females for the 10 cancer sites ranged from 0.02 to 3.3% and from 0.04 to 2.4% for the years 1982 and 2000 respectively; whereas among males, it ranged from 0.04 to 0.89% and from 0.05 to 0.95% respectively. Significant (P<0.05) increasing trends were observed for breast, non-Hodgkin's lymphoma (NHL), gallbladder, thyroid and ovary cancers among females; while declining trends were observed for cervix, mouth, stomach, esophagus and tongue cancers. Among males, significant (P<0.05) increasing trends wre observed for NHL and prostate cancer; whereas declining trends were observed for stomach, liver, hypopharynx and tongue cancers. Cancers of mouth and esophagus showed increasing trends (P<0.05) in some regions and declining trends (P<0.05) in some other. CONCLUSION: Significant and higher rates of positive trends in lifetime cancer risks for breast cancer among females and for NHL among both sexes were observed.
Authors: Anju Bansal; Abha Soni; Punita Rao; L C Singh; Ashwani Kumar Mishra; N K Mohanty; Sunita Saxena Journal: Indian J Med Res Date: 2012-10 Impact factor: 2.375