Esophageal Cancer
Copyright ©2006 Baishideng Publishing Group Co.
World J Gastroenterol. Mar 21, 2006; 12(11): 1686-1693
Published online Mar 21, 2006. doi: 10.3748/wjg.v12.i11.1686
Table 1 Characteristics among EC cases and controls in Dafeng and Ganyu 1n (%)
CharacteristicsDafeng (high-risk)Ganyu (low-risk)P value2
Case (n=291)Control (n=291)Control (n=240)Case (n=240)
Gender: Male200 (68.7)200 (68.7)181 (75.4)181 (75.4)0.088
Female91 (31.3)91 (31.3)59 (24.6)59 (24.6)
Age (yr) Mean±SD64.8 ± 8.664.6 ± 8.965.4 ± 10.365.6 ± 10.40.002
<5014 (4.8)17 (5.8 )19 (7.9)17 (7.1)
50-5961 (30.0)59 (20.3)48 (20.0)51 (21.3)
60-69137(47.1)137 (47.1)78 (32.5)76 (31.7)
70-7971 (24.4)69 (23.7)77 (32.1)78 (32.5)
≥808 (2.8)9 (3.1)18 (7.5)18 (7.5)
Level of education
Illiterate156 (53.6)130 (44.7)138 (57.7)164 (68.6)<0.001
Primary school95 (32.7)119 (40.9)63 (26.4)54 (22.6)
Secondary school & above40 (13.7)42 (14.4)38 (15.9)21 (8.8 )
Past economic status(By separate cut-off points)
Median (CNY/yr)1250150010007750.235
1 (lowest)97 (33.5)55 (19.0)38 (16.2)47 (20.3)
268 (23.5)64 (22.1)71 (30.2)87 (37.5)
373 (25.2)96 (33.1)71 (30.2)59 (25.4)
4 (highest)52 (17.9)75 (25.9)55 (23.4)39 (16.8)
Smoking status3
Neversmoker92 (31.6)122 (41.9)95 (39.6)82 (34.2)0.067
Former-smoker71 (24.4)64 (22.0)19 (7.9)17 (7.1)
Current smoker128 (44.0)105 (36.1)126 (52.5)141 (58.7)
Alcohol drinking status4
Never drinker175 (60.1)181 (62.2)143 (59.6)131 (54.6)0.076
Former drinker5 (1.7)7 (2.4)7 (2.9)7 (2.9)
Current drinker111 (38.1)103 (35.4)90 (37.5)102 (42.5)
Encountered misfortune in past10 yr:
No54 (18.6)41 (14.2)33 (14.0)54 (23.3)0.008
Yes237 (81.4)248 (85.8)203 (86.0)178 (76.7)
History of family cancer
No112 (38.5)86 (29.6)16 (6.7)29 (12.1)<0.001
Yes179 (61.5)205 (70.5)224 (93.3)211 (87.9)
Body mass index
<18.560 (20.8)27 (9.3)18 (7.6)31 (13.4)0.014
18.5-23.9182 (63.0)192 (66.2)161 (67.9)155 (67.1)
23.9-27.934 (11.8)60 (20.7 )46 (19.4)28 (12.1)
≥2813 (4.5)11 (3.8)12 (5.1)17 (7.4)
Table 2 OR1 and 95% CI of socioeconomic status in EC of Dafeng and Ganyu
Socioeconomic statusDafeng (high-risk)Ganyu (low-risk)
Level of education
Illiterate1.00 (Referent)1.00 (Referent)
Primary school0.54 (0.35-0.84)0.58 (0.33-1.03)
Secondary school & above0.74 (0.39-1.41)0.42 (0.21-0.83)
P value for trend0.080.008
Past economic status
1 (lowest)1.00 (Referent)1.00 (Referent)
20.67 (0.43-1.06)1.03 (0.61-1.75)
30.44 (0.28-0.68)0.76 (0.44-1.31)
4 (highest)0.39 (0.23-0.65)0.73 (0.41-1.28)
P value for trend<0.0010.024
Encountered misfortune in past 10 yr
No1.00 (Referent)1.00 (Referent)
Yes1.26 (0.80-1.98)1.64 (0.98-2.73)
History of family cancer
No1.00 (Referent)1.00 (Referent)
Yes1.53 (1.06-2.19)2.07 (1.03-4.17)
Body mass index
<18.51.00 (Referent)1.00 (Referent)
18.5-23.90.45 (0.26-0.76)0.50 (0.28-0.90)
23.9-27.90.26 (0.13-0.50)0.36 (0.17-0.75)
≥280.49 (0.18-1.33)0.80 (0.33-1.98)
P value for trend0.0020.376
Table 3 OR1 and 95% CI of tobacco smoking in EC of Dafeng and Ganyu
Tobacco smokingDafeng (high-risk)Ganyu (low-risk)
Smoking status2
Former smoker1.93 (0.91-4.08)1.28 (0.28-5.83)
Current smoker2.42 (1.28-4.56)2.36 (0.89-6.26)
P value for trend0.0050.07
Duration of smoking (yr)2
<202.02 (0.93-4.38)1.60 (0.31-7.90)
20-342.32 (1.15-4.67)2.25 (0.80-6.35)
≥351.80 (0.62-5.24)0.98 (0.29-3.24)
P value for trend0.0160.249
Duration of smoking (yr)2
1-291.61 (0.67-3.86)1.44 (0.46-4.42)
30-492.65 (1.28-5.49)2.04 (0.60-6.92)
≥202.04 (0.78-5.35)1.98 (0.43-9.11)
P value for trend0.0090.194
Amount of smoking (Cig/d)2
1-91.36 (0.50-3.74)1.12 (0.27-4.68)
10-192.21 (1.01-4.80)1.56 (0.42-5.78)
≥202.04 (1.00-4.18)0.91 (0.32-2.61)
P value for trend0.0150.915
Total consumption of cigarettes2
1 (lowest)1.40 (0.61-3.21)0.96 (032-2.82)
22.55 (1.06-6.14)3.50 (0.37-32.8)
31.88 (0.79-4.49)1.94 (0.25-14.7)
4 (highest)1.81 (0.57-5.74)0.74 (0.19-2.81)
P value for trend0.0290.959
Table 4 OR1 and 95% CI of alcohol drinking in EC of Dafeng and Ganyu
Alcohol drinkingDafeng (high-risk)Ganyu (low-risk)
Alcohol drinking
Never1.00 (Referent)1.00 (Referent)
Ever1.01 (0.70-1.46)1.71 (1.02-2.88)
P value0.9640.043
Age of first drink2
<200.83 (0.44-1.58)2.59 (1.03-6.50)
20-341.23 (0.79-1.91)1.95 (1.08-3.53)
≥350.81 (0.48-1.35)1.18 (0.56-2.47)
P value for trend0.8150.012
Duration of drinking (yr)2
1-240.96 (0.56-1.59)1.28 (0.58-2.79)
25-340.89 (0.48-1.64)1.48 (0.75-2.94)
35-441.57 (0.92-2.70)1.47 (0.71-3.01)
≥450.77 (0.43-1.40)1.88 (0.95-3.75)
P value for trend0.8340.061
Alcohol consumption 10 years ago2 (pure ethanol mL/wk)
1-2490.87 (0.49-1.54)0.79 (0.36-1.74)
250-4991.06 (0.60-1.89)0.61 (0.30-1.25)
500-7490.97 (0.52-1.79)1.63 (0.77-3.43)
≥7501.10 (0.63-1.93)1.27 (0.71-2.28)
P value for trend0.740.223
Table 5 OR and 95% CI of dietary habits, food consumption in EC of Dafeng and Ganyu
Dietary factorCountyCategory
P value for trend
1 (lowest)234 (highest)
Food temperature1Dafeng10.51 (0.24-1.09)--0.08
(1-Normal; 2- Hot)Ganyu11.14 (0.55-2.41)--0.714
Eating speed1Dafeng14.01 (1.87-8.62)--<0.001
(1-Normal; 2-Fast)Ganyu13.09 (1.24-7.70)--0.015
Self reported grain fungi pollution1Dafeng12.27 (0.79-6.54)--0.131
(1-Likely; 2-Not likely)Ganyu11.18 (0.45-3.11)--0.741
Fresh garlic/wk23Dafeng10.64 (0.26-1.60)--0.337
Ganyu11.17 (0.57-2.41)--0.664
Staple foods1Dafeng10.45 (0.19-1.10)0.54 (0.21-1.38)0.73 (0.26-2.04)0.474
Ganyu10.98 (0.10-9.77)0.45 (0.05-4.38)0.54 (0.05-4.34)0.324
Meat4Dafeng10.73 (0.29-1.85)1.66 (0.68-4.10)1.93 (0.64-5.77)0.16
Ganyu10.54 (0.12-2.42)1.17 (0.28-4.92)0.65 (0.11-3.67)0.305
Fish and seafood products4Dafeng11.14 (0.64-2.03)2.11 (1.12-3.96)1.91 (1.00-3.64)0.023
Ganyu10.98 (0.42-2.28)0.64 (0.28-1.44)1.04 (0.46-2.33)0.794
Eggs4Dafeng10.53 (0.20-1.44)1.23 (0.54-2.80)1.99 (0.72-5.49)0.146
Ganyu10.69 (0.28-1.73)0.30 (0.10-1.10)0.95 (0.41-2.22)0.936
Soybean45Dafeng11.81 (0.88-3.74)--0.11
Ganyu11.31 (0.37-4.59)--0.677
Preserved foods4Dafeng10.26(0.09-0.75)0.49 (0.16-1.46)0.94 (0.37-2.36)0.635
Ganyu11.05 (0.37-2.97)0.56 (0.21-1.48)1.21 (0.46-3.20)0.932
Vegetables4Dafeng11.26 (0.50-3.16)0.94 (0.39-2.30)1.37 (0.49-3.83)0.72
Ganyu10.34 (0.08-1.54)0.80 (0.20-3.18)0.76 (0.15-3.72)0.889
Fruits2Dafeng11.02 (0.42-2.47)0.42 (0.16-1.12)1.23 (0.51-2. 98)0.802
Ganyu11.61 (0.68-3.80)1.13 (0.43-2.95)1.17 (0.41-3.37)0.746