Masahide Imaki

Epidemiological Study of Periodontal Disease and White Blood Cell Count among Employees in a Company

Epidemiological Study of Periodontal Disease and White Blood Cell Count among Employees in a Company: Yukie Yoshida, et al. Osaka Prefectural College of Health Science—The purpose of this study was to investigate the relationship between the white blood cell (WBC) count and periodontal disease as classified by the Community Periodontal Index of Treatment Needs (CPITN) in 1,241 male Japanese factory workers by determining their WBC count and the extent of their periodontal disease. The results obtained were as follows: in both smoker and non‐smoker, the results of a two‐way ANOVA indicated that the CPITN score 3 and 4 groups had a significantly higher WBC count than the CPITN score 0, 1 and 2 groups. The results of multiple regression analysis indicated that the WBC counts were significantly associated with age, smoking and the CPITN score. It appeared that there was a significant relationship between the WBC count and the prevalence of periodontal disease among employees in a company.

Lifestyles and periodontal disease of Japanese factory workers.

The association between lifestyle and periodontal disease as classified by the Community Periodontal Index of Treatment Needs (CPITN) was investigated in 1,821 factory workers, 20–69 years of age, residing in Osaka, Japan. Lifestyles were examined using a questionnaire concerning the smoking habits, alcohol consumption, physical exercise, sleeping hours and dietary habits of male factory workers.Age and sex were strongly associated with the CPITN score. In the male factory workers, the CPITN scores of each age group were significantly greater for smokers than for nonsmokers; mesn ± S.D., 2.41 ± 0.96 and 2.28 ± 0.87, respectively. The CPITN scores were also greater in high-consumption and long-duration smokers, compared to low-consumption and short-duration smokers in male factory workers.Our results show that sex, aging and smoking are risk indicators for periodontal disease.

Cohort study of the total leukocyte count and periodontal disease among company employees

There have been few epidemiological studies of the relationship between the leukocyte count and dental disease. In the present study, therefore, we investigated the relationship between oral health indicated by the Community Periodontal Index of Treatment Needs (CPITN) and the total leukocyte count in the cohort study. The 1,035 subjects were male factory workers employed at a chemical factory in Osaka, Japan. Their oral conditions were recorded as the CPITN score. The relationship between the total leukocyte count and the oral condition of the subjects classified according to their smoking habits was investigated over a 5-year period. Among the current smokers, the total leukocyte count was highest each year for the group with CPITN level 4, followed by those with CPITN levels 3 and 2 in descending order, showing that the total leukocyte count was reduced as the periodontal diseases ameliorated. Among the nonsmokers, the total leukocyte count was high every year in the group with CPITN levels 4 or 3 compared to that of the group with CPITN level 2. The fluctuations of the total leukocyte count in current smokers and nonsmokers whose CPITN score increase or decreased in five years was investigated. There were no significant differences among the all groups.

Boric Acid Removal by Activated Carbon.

In search of a better primary treatment of acute boric acid poisoning, the adsorption capacity of boric acid onto activated carbon as an antidote was investigated in vitro.Wide differences in the amount of boric acid adsorbed were recognized depending on individual activated carbons. In order to elucidate the dominant factor in boric acid adsorption, correlations between the properties of activated carbon and the amounts of boric acid adsorbed are discussed. A significant correlation was recognized between the surface pH of activated carbon and the amount of boric acid adsorbed in low equilibrium concentration. It is assumed that the surface pH of activated carbon is a chief factor affecting the amount of boric acid adsorbed.

Nutritional evaluation of serum colloidal reactions. Especially Thymol turbidity test.

徳島県の農漁村の健康な中老年 (30-69才) の住民287名 (男性96名, 女性191名) を対象に, 摂取栄養素量と肝機能検査で用いられている血清こう質反応の一つであるTTTと関係について疫学的な調査を実施し, 以下の結果を得た。対象集団の栄養状態は, 熱量, 蛋白質, 脂質, 糖質の摂取量は比較的良好な集団である。TTT値は女性は男性に比べていて有意に高い。又男女ともに加令に伴って上昇する傾向を認めた。男性では, 中年層において糖質, 熱量, 植物性蛋白質, 老年層において動物性脂質, 熱量と有意な関係を認めた。女性では, 中年層において重相関係数は, 統計的に有意でなかった。しかし, 老年層においては, 動物性蛋白質, 植物性脂質と関連性が認められ, TTT値が, 肝機能検査の指標ぼかりでなく, 摂取栄養量と深く関係していることが認められた。

Study on the serum enzyme activity and nutrient intakes. Application of canonical correlation analysis.

The purpose of this study is to make clear a comprehensive relationship between two groups of serum enzyme activity and nutrient intakes. The first group of measurement include serum GOT, GPT, ALP activity and the second group of measurements include protein, fat, carbohydorate, vitamin A, B1, B2, C, animal protein, animal fat, age, and weight.These figures are taken from the epidemiological survey of Tokushima prefecture, including 252 males and 383 females, investigated from 1975 to 1980.Appling the canonical correlation analysis, we found the following results.1) In male, only two canonical correlations were statistically significant. The serum GOT and GPT activity related to body weight, further serum GOT activity was effected quality of food intakes.2) In Female, three canonical correlations were statistically significant. Both serum GOT and GPT activity related to protein intakes. High correlations were observed between serum GOT activty and vitamin B1, between serum GPT activity and vitamin C, between serum ALP activity and age.