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Bidi smoking and lung cancer incidence among males in Karunagappally cohort in Kerala, India.

Abstract

The association of lung cancer incidence with bidi smoking was examined using a cohort study data in Karunagappally, Kerala, India. We sought interview of all the residents in Karunagappally with the population of 385,103 in 1991 census, and established a cohort of 359,619 (93% of the population in 1991) in the 1990s. There were 65,829 men aged 30-84 at interview after excluding those diagnosed as cancer or died of any cause before 1997. Among them, 212 newly diagnosed lung cancer cases were ascertained during the 8-year period between 1997 and 2004 through Karunagappally Cancer Registry. The relative risk (RR) of lung cancer was obtained from Poisson regression analysis of grouped data. Lung cancer incidence was relatively high among Moslem people and those with lower educational history. When taking into account attained age, religion and education, the RR between current bidi smokers and those who had never smoked bidis was 3.9 (95%CI = 2.6-6.0, p < 0.001). The lung cancer risk did not return to the level of non-smokers within 10 years after cessation. In further analyses using only those never smoked cigarettes to examine the effect of bidi smoking alone on lung cancer risk, current smokers of bidis had the RR of 4.6 (95%CI = 2.5-8.5, p < 0.001). Lung cancer incidence increased with larger amounts of bidi smoked a day (p < 0.001), with longer durations of smoking bidis (p < 0.001), and with younger ages starting smoking bidis (p < 0.001). Immediate measures should be taken to stop bidi smoking, which is common in south Asia.

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  • Authors+Show Affiliations

    ,

    Natural Background Radiation Cancer Registry, Karunagappally, Kerala, India. qln_nbrrkply@sancharnet.in

    , , , , ,

    Source

    International journal of cancer 123:6 2008 Sep 15 pg 1390-7

    MeSH

    Adult
    Aged
    Aged, 80 and over
    Cohort Studies
    Humans
    Incidence
    India
    Lung Neoplasms
    Male
    Middle Aged
    Risk Factors
    Smoking
    Tobacco

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    18623085

    Citation

    Jayalekshmy, Padmavathy Amma, et al. "Bidi Smoking and Lung Cancer Incidence Among Males in Karunagappally Cohort in Kerala, India." International Journal of Cancer, vol. 123, no. 6, 2008, pp. 1390-7.
    Jayalekshmy PA, Akiba S, Nair MK, et al. Bidi smoking and lung cancer incidence among males in Karunagappally cohort in Kerala, India. Int J Cancer. 2008;123(6):1390-7.
    Jayalekshmy, P. A., Akiba, S., Nair, M. K., Gangadharan, P., Rajan, B., Nair, R. K., & Sugahara, T. (2008). Bidi smoking and lung cancer incidence among males in Karunagappally cohort in Kerala, India. International Journal of Cancer, 123(6), pp. 1390-7. doi:10.1002/ijc.23618.
    Jayalekshmy PA, et al. Bidi Smoking and Lung Cancer Incidence Among Males in Karunagappally Cohort in Kerala, India. Int J Cancer. 2008 Sep 15;123(6):1390-7. PubMed PMID: 18623085.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Bidi smoking and lung cancer incidence among males in Karunagappally cohort in Kerala, India. AU - Jayalekshmy,Padmavathy Amma, AU - Akiba,Suminori, AU - Nair,Madhavan Krishnan, AU - Gangadharan,Paleth, AU - Rajan,Balakrishnan, AU - Nair,Reghuram K, AU - Sugahara,Tsutomu, PY - 2008/7/16/pubmed PY - 2008/8/23/medline PY - 2008/7/16/entrez SP - 1390 EP - 7 JF - International journal of cancer JO - Int. J. Cancer VL - 123 IS - 6 N2 - The association of lung cancer incidence with bidi smoking was examined using a cohort study data in Karunagappally, Kerala, India. We sought interview of all the residents in Karunagappally with the population of 385,103 in 1991 census, and established a cohort of 359,619 (93% of the population in 1991) in the 1990s. There were 65,829 men aged 30-84 at interview after excluding those diagnosed as cancer or died of any cause before 1997. Among them, 212 newly diagnosed lung cancer cases were ascertained during the 8-year period between 1997 and 2004 through Karunagappally Cancer Registry. The relative risk (RR) of lung cancer was obtained from Poisson regression analysis of grouped data. Lung cancer incidence was relatively high among Moslem people and those with lower educational history. When taking into account attained age, religion and education, the RR between current bidi smokers and those who had never smoked bidis was 3.9 (95%CI = 2.6-6.0, p < 0.001). The lung cancer risk did not return to the level of non-smokers within 10 years after cessation. In further analyses using only those never smoked cigarettes to examine the effect of bidi smoking alone on lung cancer risk, current smokers of bidis had the RR of 4.6 (95%CI = 2.5-8.5, p < 0.001). Lung cancer incidence increased with larger amounts of bidi smoked a day (p < 0.001), with longer durations of smoking bidis (p < 0.001), and with younger ages starting smoking bidis (p < 0.001). Immediate measures should be taken to stop bidi smoking, which is common in south Asia. SN - 1097-0215 UR - https://www.unboundmedicine.com/medline/citation/18623085/Bidi_smoking_and_lung_cancer_incidence_among_males_in_Karunagappally_cohort_in_Kerala_India_ L2 - https://doi.org/10.1002/ijc.23618 DB - PRIME DP - Unbound Medicine ER -