Share of tobacco related cancers: gender and time gaps-Indian scenario.
BACKGROUND
Cancer is one of the leading causes of mortality in Indian population with control approach of varied kind which the health system of the country needs to prioritize. The tobacco related cancer which account for major share of all the cancers could be largely controlled through primary prevention a strategy effective in terms of resources hence take priority in terms of cancer control activities. It would be worthwhile to study the cancer of sites and relative magnitude of the cancers which are tobacco related and are amenable for prevention.


METHODS
The age specific cancer incidence rates of cancer as available from the consolidated reports of the National Cancer Registry Program of Indian Council of Medical Research for the years 1990-96 an 2001-04 were utilized for computing proportion of tobacco related cancers which included population based cancer registries at Bangalore, Bhopal, Barshi a rural registry in Maharashtra, Chennai, Delhi and Mumbai. As defined cancer of the sites oral cavity, lip, tongue, oropharynx, hypopharnx, pharynx, oesophagus, larynx, lung, urinary bladder were considered as tobacco related cancers. The statistical evaluation of proportion of tobacco related cancers between two time periods under consideration was carried out by proportion test.


RESULTS
There was a significant decline of proportion of tobacco related cancers from 1990-96 to 2003 for all the registries except Bhopal where around 50% of the total cancers attributed to tobacco habits for the two time periods under consideration. The Barshi also reported a decline but was not statistically significant. In females the proportion of tobacco related cancers ranged between 17% in Bangalore 10% in Delhi for the two time periods under review. All the registries showed significant decline in proportion of tobacco related cancers for the periods under consideration, except Delhi and Bhopal, while rural registry at Barshi revealed an increase of 3.3 %. The gender difference of the proportion of tobacco related cancers ranges between 19.8% to 34% during the period 1990-96, while it was 18.5% to 35% for the period 2001-03. While examining the difference between gender gap between the two time periods, the results from Mumbai registry revealed significant decline.
Scientist C, National Institute of Medical Statistics (ICMR) , New Delhi, India .
Atul
A
Juneja
Scientist D, National Institute of Medical Statistics (ICMR) , New Delhi, India .
Tulsi
T
Adhikari
Director, National Institute of Medical Statistics (ICMR) , New Delhi, India .
Arvind
A
Pandey
Scientist E, Institute of Cytology and Preventive Oncology (ICMR) , Noida, UP, India .
Shashi
S
Sharma
Scientist G, Institute of Cytology and Preventive Oncology (ICMR) , Noida, UP, India .
Ashok
A
Sehgal
Cancer; Gender gap; Proportion-tobacco related cancers; Tobacco