Case Control Study
Copyright ©The Author(s) 2016.
World J Gastrointest Oncol. Feb 15, 2016; 8(2): 207-214
Published online Feb 15, 2016. doi: 10.4251/wjgo.v8.i2.207
Table 2 Frequency of food intake among cases and controls, n (%)
Food itemNever or hardly everOnce a month2-3 times/moOnce a week2-3 times/wk4-6 times/wkOnce a dayTotal
EggCase7 (7.4)17 (18.1)6 (6.4)28 (29.8)21 (22.3)7 (7.4)8 (8.5)94
Control8 (8.5)36 (38.3)10 (10.6)27 (28.7)8 (8.5)-5 (5.3)94
ChickenCase13 (13.8)31 (33)9 (9.6)36 (38.3)5 (5.3)--94
Control12 (12.8)45 (47.9)14 (14.9)19 (20.2)4 (4.3)--94
MuttonCase23 (24.5)40 (42.6)4 (4.3)25 (26.6)1 (1.1)1 (1.1)-94
Control44 (46.8)42 (44.7)3 (3.2)4 (4.3)1 (1.1)--94
FishCase26 (27.7)49 (52.1)2 (2.1)6 (6.4)10 (10.6)1 (1.1)-94
Control27 (28.7)61 (64.9)1 (1.1)2 (2.1)1 (1.1)2 (2.1)-94
BeefCase68 (72.3)1 (1.1)1 (1.1)18 (19.1)6 (6.4)--94
Control81 (86.2)6 (6.4)-7 (7.4)---94
PorkCase81 (86.2)9 (9.6)1 (1.1)2 (2.1)1 (1.1)--94
Control87 (92.6)5 (5.3)-2 (2.1)---94
Fried foodsCase3 (3.2)32 (34.0)6 (6.4)35 (37.2)18 (19.1)--94
Control5 (5.3)45 (47.9)14 (14.9)28 (29.8)2 (2.1)--94
FruitsCase32 (34.0)37 (39.4)7 (7.4)6 (6.4)5 (5.3)3 (3.2)4 (4.3)94
Control36 (38.3)23 (24.5)14 (14.9)13 (13.8)3 (3.2)-5 (5.3)94
VegetablesCase----13 (13.8)7 (7.4)74 (78.7)94
Control----2 (2.1)8 (8.5)84 (89.4)94
CoffeeCase81 (86.2)----13 (13.8)94
Control87 (92.6)-----7 (7.4)94
TeaCase20 (21.2)----74 (78.7)94
Control11 (11.7)-----83 (88.3)94