Prospective Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Nov 28, 2015; 21(44): 12676-12685
Published online Nov 28, 2015. doi: 10.3748/wjg.v21.i44.12676
Table 3 Gastric cancer risk in relation to bidi smoking among men
Person-yearsGastric cancer casesRR95%CIP value1
Bidis smoked per day0.012
Never441290351.0Reference
Former70584151.30.7-2.5
1-44076841.00.4-2.8
5-14131494201.40.8-2.5
15-24105359231.91.1-3.4
≥ 2567303151.70.9-3.2
Unknown4392441.00.3-2.8
Duration of bidi smoking0.036
Never441290351.0Reference
1-14141330101.30.6-2.8
15-29123435141.10.6-2.1
30-4484545302.01.2-3.5
≥ 4568393231.60.9-3.0
Unknown4172841.00.4-3.0
Age at start of bidi smoking0.161
< 1864800142.01.0-3.9
18-22172714321.81.1-2.9
≥ 23109709161.30.7-2.5
Never441290351.0Reference
Unknown4162440.0
Years since quitting bidi smoking0.424
Current smokers347383621.0Reference
< 52843560.90.4-2.0
5-91805851.10.5-2.9
≥ 102305540.60.2-1.7
Never441290350.60.4-1.0
Unknown4250040.60.2-1.7