OBJECTIVE: We evaluated the relationship between opium consumption and bladder cancer (BC) in a case-control study of an Iranian population. MATERIALS AND METHODS: In a hospital-based case-control study of 179 patients with BC and 179 cancer-free controls frequency-matched by age, sex, and smoking status, we investigated the relationship between opium consumption and BC. A comprehensive epidemiologic interview was conducted on all participants to collect personal information, such as demographics and smoking status. RESULTS: Overall, we found significant age, sex, cigarette smoking adjusted association between BC risk and opium consumption, [odds ratio (OR) = 4.60; 95% confidence interval (CI) = 3.53-6.28]. The elevated risk was more evident in older individuals (OR = 5.42; 95% CI, 4.12-7.28) than younger individuals (OR = 3.65; 95% CI, 2.76-4.76) (P = 0.01). Heavy smokers with the opium consumption exhibited a 6-fold elevated risk for BC (OR = 6.16; 95% CI, 3.34-8.32) (P = 0.0001). When stratified according to different grades of BC, a 3.4-fold increased risk was associated with the opium consumption in grade III with an OR of 3.44 (95% CI, 2.82-8.28) (P = 0.001). A similar but slightly higher risk was also seen in case of grade IV tumors (OR = 3.86; 95% CI, 2.14-10.16) (P = 0.001). Invasive bladder tumors were more common among the opiates users (OR = 2.6; 95% CI, 1.44-5.42) (P = 0.01). Cumulative risk of BC in women with opium consumption (OR = 4.10 95% CI, 3.54-5.88) (P = 0.001) was slightly less than in men (OR = 5.10 95% CI, 3.54-5.88) (P = 0.0001). Based on Pearson correlations, the risk of BC significantly correlated with opium dependence duration (r = 0.74, P = 0.001), type of opiate used (r = 0.65, P = 0.001), and simultaneous cigarette smoking (r = 0.74, P = 0.0001). CONCLUSION: The results indicated that there is about 5-fold increase in risk of developing this cancer in the presence of opium consumption. Further research is needed to investigate the functional implications of the opium consumption in BC.
OBJECTIVE: We evaluated the relationship between opium consumption and bladder cancer (BC) in a case-control study of an Iranian population. MATERIALS AND METHODS: In a hospital-based case-control study of 179 patients with BC and 179 cancer-free controls frequency-matched by age, sex, and smoking status, we investigated the relationship between opium consumption and BC. A comprehensive epidemiologic interview was conducted on all participants to collect personal information, such as demographics and smoking status. RESULTS: Overall, we found significant age, sex, cigarette smoking adjusted association between BC risk and opium consumption, [odds ratio (OR) = 4.60; 95% confidence interval (CI) = 3.53-6.28]. The elevated risk was more evident in older individuals (OR = 5.42; 95% CI, 4.12-7.28) than younger individuals (OR = 3.65; 95% CI, 2.76-4.76) (P = 0.01). Heavy smokers with the opium consumption exhibited a 6-fold elevated risk for BC (OR = 6.16; 95% CI, 3.34-8.32) (P = 0.0001). When stratified according to different grades of BC, a 3.4-fold increased risk was associated with the opium consumption in grade III with an OR of 3.44 (95% CI, 2.82-8.28) (P = 0.001). A similar but slightly higher risk was also seen in case of grade IV tumors (OR = 3.86; 95% CI, 2.14-10.16) (P = 0.001). Invasive bladder tumors were more common among the opiates users (OR = 2.6; 95% CI, 1.44-5.42) (P = 0.01). Cumulative risk of BC in women with opium consumption (OR = 4.10 95% CI, 3.54-5.88) (P = 0.001) was slightly less than in men (OR = 5.10 95% CI, 3.54-5.88) (P = 0.0001). Based on Pearson correlations, the risk of BC significantly correlated with opium dependence duration (r = 0.74, P = 0.001), type of opiate used (r = 0.65, P = 0.001), and simultaneous cigarette smoking (r = 0.74, P = 0.0001). CONCLUSION: The results indicated that there is about 5-fold increase in risk of developing this cancer in the presence of opium consumption. Further research is needed to investigate the functional implications of the opium consumption in BC.
Authors: Masoud M Malekzadeh; Hooman Khademi; Akram Pourshams; Arash Etemadi; Hossein Poustchi; Mohammad Bagheri; Masoud Khoshnia; Amir Ali Sohrabpour; Ali Aliasgari; Elham Jafari; Farhad Islami; Shahryar Semnani; Christian C Abnet; Paul D P Pharoah; Paul Brennan; Paolo Boffetta; Sanford M Dawsey; Reza Malekzadeh; Farin Kamangar Journal: Am J Gastroenterol Date: 2013-10-22 Impact factor: 10.864
Authors: Atieh Rahmati; Ramin Shakeri; Hooman Khademi; Hossein Poutschi; Akram Pourshams; Arash Etemadi; Masoud Khoshnia; Amir Ali Sohrabpour; Ali Aliasgari; Elham Jafari; Farhad Islami; Shahryar Semnani; Abdolsamad Gharravi; Christian C Abnet; Paul D P Pharoah; Paul Brennan; Paolo Boffetta; Sanford M Dawsey; Reza Malekzadeh; Farin Kamangar Journal: Thorax Date: 2016-11-24 Impact factor: 9.139
Authors: Hooman Khademi; Reza Malekzadeh; Akram Pourshams; Elham Jafari; Rasool Salahi; Shahryar Semnani; Behrooz Abaie; Farhad Islami; Siavosh Nasseri-Moghaddam; Arash Etemadi; Graham Byrnes; Christian C Abnet; Sanford M Dawsey; Nicholas E Day; Paul D Pharoah; Paolo Boffetta; Paul Brennan; Farin Kamangar Journal: BMJ Date: 2012-04-17