Epidemiological features of first-visit outpatients in Japan: Comparison with general population and variation by sex, age, and season

Inoue, Manami; Tajima, Kazuo; Hirose, Kaoru; Hamajima, Nobuyuki; Takezaki, Toshiro; Kuroishi, Tetsuo; Tominaga, Suketami

doi:10.1016/s0895-4356(96)00297-1

Cited by 133 publications

(137 citation statements)

References 18 publications

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“…However, because cases and controls were selected from the same hospital and almost all patients lived in the Tokai area of central Japan, the internal validity of this case-control study is likely to be acceptable. External validity (generalizability of the results) has been confirmed in our previous study, 42 as characteristics of the study sample are similar to the general population in the Tokai area. To limit any bias that might have resulted from the inclusion of a specific diagnostic group that is related to the exposure, we did not set eligibility criteria for control diseases.…”

Section: Epidemiologysupporting

confidence: 67%

Coffee and green tea consumption is associated with upper aerodigestive tract cancer in Japan

et al. 2013

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The impact of coffee and green tea consumption on upper aerodigestive tract (UADT) cancer risk has not been established. Evaluation of the possible anticarcinogenic properties of their ingredients is confounded by the potential increase in risk owing to the high temperatures at which these beverages are generally consumed. We conducted a case-control study to evaluate the association between coffee and tea consumption and the risk of UADT cancer. The study enrolled 961 patients with UADT cancer and 2,883 noncancer outpatients who visited Aichi Cancer Center between 2001 and 2005. Information on coffee and green tea consumption and other lifestyle factors was collected via a self-administered questionnaire. Consumption of three or more cups of coffee per day had a significant inverse association with UADT cancer [odds ratio (OR) 0.73, 95% confidence interval (CI) 0.55-0.96]. In contrast, consumption of three or more cups of green tea per day had a significant positive association with UADT cancer (OR 1.39, 95% CI 1.13-1.70). These associations were evident for head and neck cancer but not for esophageal cancer. The association of coffee consumption with head and neck cancer was observed only among never smokers and alcohol drinkers. Similarly, the association of green tea consumption was observed among never smokers and never alcohol drinkers. No change in these associations was seen on stratification by each confounding factors. These findings suggest that consumption of coffee might be associated with a decreased risk of UADT cancer, whereas that of green tea might be associated with an increased risk.Coffee and tea are the most frequently consumed beverages in the world. 1,2 Coffee is extracted from the roasted seeds (coffee beans) of several species of coffee plants (primarily Coffea arabica and Coffea canephora), which are cultivated in tropical countries. Green tea, the most commonly consumed tea product in Japan, is brewed from the leaves of the tea plant (Camellia sinensis). Differences among types of tea, such as green tea, black tea and oolong tea, result from differences in the degree of fermentation of their leaves. 3 Previous studies suggest that the consumption of coffee and green tea may provide a protective effect against cancer owing to their anticarcinogenic components. Coffee and

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Section: Epidemiologysupporting

confidence: 67%

Coffee and green tea consumption is associated with upper aerodigestive tract cancer in Japan

et al. 2013

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“…External validity (generalizability of the results) has been confirmed in our previous study. 30 In addition, to dilute any bias that might have resulted from the inclusion of a specific diagnostic group that is related to the exposure, we did not set eligibility criteria for control diseases. As for allele frequencies in the subjects, given that our frequencies were comparable to those previously reported in public databases such as HapMap JPT, 31 bias in the distribution of selected polymorphisms was negligible.…”

Section: Discussionmentioning

confidence: 99%

hOGG1 Ser326Cys polymorphism and risk of lung cancer by histological type

et al. 2009

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Human 8-oxoguanine DNA glycosylase 1 (hOGG1) has a major role in the repair of 8-hydroxyguanine, a major promutagenic DNA lesion. The genetic polymorphism rs1052133, which leads to substitution of the amino acid at codon 326 from Ser to Cys, shows functional differences, namely a decrease in enzyme activity in hOGG1-Cys326. Although several studies have investigated the association between rs1052133 and lung cancer susceptibility, the effect of this locus on lung cancer according to histology remains unclear. We therefore conducted a case-control study with 515 incident lung cancer cases and 1030 age-and sex-matched controls without cancer, and further conducted a meta-analysis. In overall analysis, the homozygous Cys/Cys genotype showed a significant association with lung cancer compared to Ser allele carrier status (odds ratio (OR)¼1.31, 95% confidence interval (CI)¼1.02-1.69). By histology-based analysis, the Cys/Cys genotype showed a significantly positive association with small-cell carcinoma (OR¼2.40, 95% CI¼1.32-4.49) and marginally significant association with adenocarcinoma (OR¼1.32, 95% CI¼0.98-1.77). A meta-analysis of previous and our present study revealed that this polymorphism is positively associated with adenocarcinoma, although suggestive associations were also found for squamousand small-cell lung cancers. These results indicate that rs1052133 contributes to the risk of adenocarcinoma of lung.

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“…Compared with the general population randomly selected from the electoral roll in the same area, the general lifestyle of noncancer cases presenting at Aichi Cancer Center, including their dietary habits, was not found to demonstrate any differences. 32 Another potential source of bias is the medical background of control subjects, but we had already clarified that the majority did not One case and eight control subjects were excluded from analyses (see Table I). ORs and their 95% CIs were adjusted for BMI (continuous), habitual exercise, drinking and smoking status, green-yellow vegetable intake (g/1,000 kcal), menopausal status (pre-or post-menopause), family history of breast cancer in parents and/or siblings (yes or no), age at menarche ( 12, 13-14 or 15 years), menopausal periods (continuous), parity (0, 1, 2 or 3) and hormone users (yes or no).-2 SFAs (saturated fatty acids) 5 14:0 1 16:0 1 18:0.-3 MUFAs (monounsaturated fatty acids) 5 16:1n-7 1 18:1n-9.-4 PUFAs (polyunsaturated fatty acids) 5 n-6 PUFAs 1 n-3 PUFAs.-5 n-6 PUFAs 5 18:2n-6 1 18:3n-6 1 20:3n-6 1 20:4n-6 (arachidonic acid, AA).-6 n-3 PUFAs 5 18:3n-3 1 n-3 highly unsaturated fatty acids (HUFAs).-7 n-3 HUFAs 5 20:5n-3 (eicosapentaenoic acid, EPA) 1 22:5n-3 1 22:6n-3 (docosahexaenoic acid, DHA).…”

Section: Discussionmentioning

confidence: 99%

“…Our previous study demonstrated that it is feasible to use non-cancer outpatients at ACCH as controls in epidemiological studies because their general lifestyles are accordant with those of general population randomly selected from the electoral roll in Nagoya City, Aichi Prefecture. 32 …”

Section: Case and Control Subjectsmentioning

confidence: 99%

Breast cancer risk and erythrocyte compositions of n‐3 highly unsaturated fatty acids in Japanese

Kuriki

Hirose

Wakai

et al. 2007

Intl Journal of Cancer

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Dietary intake of fish rich in n-3 highly unsaturated fatty acids (HUFAs), such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), has been proposed to decrease cancer risk. In contrast to results from laboratory studies, however, protective effects for breast cancer have proved equivocal in epidemiological studies. In the present case-control study, we examined associations between breast cancer risk and fatty acid compositions in erythrocyte membranes as biomarkers for those intakes. Dietary information and blood samples were collected from 103 incident breast cancer cases and 309 non-cancer controls (matched by age and season) and erythrocyte fatty acids were measured using accelerated solvent extraction and gas-liquid chromatography. Dietary intake of n-3 HUFAs demonstrated a negative association with risk (the highest to the lowest tertile, odds ratio (OR), 0.51; 95% confidence interval (CI), 0.27-0.98; p trend < 0.05), but there was no association with those of saturated fatty acids (SFAs) and meat. Moreover, risk was inversely associated with erythrocyte compositions of EPA (OR, 0.27; 95% CI, 0.14-0.53; p trend < 0.0001), DHA (OR, 0.06; 95% CI, 0.02-0.16; p trend < 0.0001) and n-3 HUFAs (OR, 0.11; 95% CI, 0.05-0.24; p trend < 0.0001), and positively with that of SFAs (OR, 12.29; 95% CI,; p trend < 0.0001) and the ratio of SFAs/n-3 HUFAs (OR, 14.65; 95% CI,; p trend < 0.0001). In conclusion, we showed that erythrocyte compositions of specific fatty acids derived from fish intake, as biomarkers, are associated with lower risk of breast cancer, but further studies are needed to investigate mechanisms linked to the etiology. ' 2007 Wiley-Liss, Inc.

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Epidemiological features of first-visit outpatients in Japan: Comparison with general population and variation by sex, age, and season

Cited by 133 publications

References 18 publications

Coffee and green tea consumption is associated with upper aerodigestive tract cancer in Japan

Coffee and green tea consumption is associated with upper aerodigestive tract cancer in Japan

hOGG1 Ser326Cys polymorphism and risk of lung cancer by histological type

Breast cancer risk and erythrocyte compositions of n‐3 highly unsaturated fatty acids in Japanese

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