TY - JOUR
T1 - Opium use and risk of bladder cancer
T2 - A multi-centre case-referent study in Iran
AU - Hadji, Maryam
AU - Rashidian, Hamideh
AU - Marzban, Maryam
AU - Naghibzadeh-Tahami, Ahmad
AU - Gholipour, Mahin
AU - Mohebbi, Elham
AU - Safari-Faramani, Roya
AU - Seyyedsalehi, Monireh Sadat
AU - Hosseini, Bayan
AU - Bakhshi, Mahdieh
AU - Alizadeh-Navaei, Reza
AU - Ahmadi, Lida
AU - Rezaianzadeh, Abbas
AU - Moradi, Abdolvahab
AU - Ansari-Moghaddam, Alireza
AU - Nejatizadeh, Azim
AU - Shahidsales, Soodabeh
AU - Zohrabi, Farshad
AU - Mohammadi, Reza
AU - Nowroozi, Mohammad Reza
AU - Poustchi, Hossein
AU - Nasrollahzadeh, Dariush
AU - Najafi, Farid
AU - Haghdoost, Ali Akbar
AU - Rahimi-Movaghar, Afarin
AU - Etemadi, Arash
AU - Mohagheghi, Mohammad Ali
AU - Malekzadeh, Reza
AU - Brennan, Paul
AU - Schüz, Joachim
AU - Boffetta, Paolo
AU - Weiderpass, Elisabete
AU - Kamangar, Farin
AU - Zendehdel, Kazem
AU - Pukkala, Eero
N1 - Publisher Copyright:
© 2022 The Author(s) 2022. Published by Oxford University Press on behalf of the International Epidemiological Association.
PY - 2022/3/4
Y1 - 2022/3/4
N2 - Background: Bladder cancer (BC) is the 10th most common type of cancer worldwide and the fourth most common type of cancer in Iran. Opium use is considered as one of the risk factors for BC. We aim to assess the association between various parameters of opium use, which in Iran is mainly ingested or smoked in various forms, and the risk of BC. Method: In this multi-centre case-referent study in Iran, 717 BC cases and 3477 referents were recruited to the study from May 2017 until July 2020. Detailed histories of opium use (duration, amount, frequency) and potential confounders were collected by trained interviewers. Multivariable unconditional logistic regression models were used to measure adjusted odds ratio (OR) and 95% confidence intervals (CI). The ORs were adjusted for age, gender, place of residence and pack-years of cigarette smoking. Results: Regular opium consumption was associated with an increased risk of BC (OR 3.5, 95% CI: 2.8, 4.3) compared with subjects who never used opium. Compared with continuous users, the risk decreased to one-Third for those who stopped opium more than 10 years ago. The adjusted OR for those who used both crude opium (teriak) and opium juice was 7.4 (95% CI: 4.1, 13.3). There was a joint effect of opium and tobacco (OR for users of both opium and tobacco 7.7, 95% CI: 6.0, 9.7). Conclusions: Regular opium use is associated with an approximately 4-fold risk for BC. The OR decreases along with the increasing time since stopping opium use.
AB - Background: Bladder cancer (BC) is the 10th most common type of cancer worldwide and the fourth most common type of cancer in Iran. Opium use is considered as one of the risk factors for BC. We aim to assess the association between various parameters of opium use, which in Iran is mainly ingested or smoked in various forms, and the risk of BC. Method: In this multi-centre case-referent study in Iran, 717 BC cases and 3477 referents were recruited to the study from May 2017 until July 2020. Detailed histories of opium use (duration, amount, frequency) and potential confounders were collected by trained interviewers. Multivariable unconditional logistic regression models were used to measure adjusted odds ratio (OR) and 95% confidence intervals (CI). The ORs were adjusted for age, gender, place of residence and pack-years of cigarette smoking. Results: Regular opium consumption was associated with an increased risk of BC (OR 3.5, 95% CI: 2.8, 4.3) compared with subjects who never used opium. Compared with continuous users, the risk decreased to one-Third for those who stopped opium more than 10 years ago. The adjusted OR for those who used both crude opium (teriak) and opium juice was 7.4 (95% CI: 4.1, 13.3). There was a joint effect of opium and tobacco (OR for users of both opium and tobacco 7.7, 95% CI: 6.0, 9.7). Conclusions: Regular opium use is associated with an approximately 4-fold risk for BC. The OR decreases along with the increasing time since stopping opium use.
KW - bladder cancer
KW - IROPICAN
KW - opium
U2 - 10.1093/ije/dyac031
DO - 10.1093/ije/dyac031
M3 - Article
C2 - 35244716
AN - SCOPUS:85131902873
SN - 0300-5771
VL - 51
SP - 830
EP - 838
JO - International Journal of Epidemiology
JF - International Journal of Epidemiology
IS - 3
ER -