論文 - 加茂　憲一

Lifetime and age-conditional probabilities of developing or dying of cancer in Japan

Ken-ichi Kamo, Kota Katanoda, Tomohiro Matsuda, Tomomi Marugame, Wakiko Ajiki, Tomotaka Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  38 ( 8 ) 571 - 576  2008年08月  [査読有り]

担当区分：   筆頭著者  , 責任著者

　概要を見る

The concepts of lifetime and age-conditional probabilities of developing and dying of cancer are introduced as indexes to understand the risk of cancer. In this paper, we estimated the lifetime and age-conditional probabilities of developing and dying of cancer in 2001 and 2005, respectively, in Japan. It is estimated that one in two Japanese males and one in three females will develop cancer, and one in four Japanese males and one in six females will die of cancer. Moreover, the probabilities of developing cancer within specific decades of age are obtained as the short-term risks.

DOI

【胃癌 基礎・臨床研究のアップデート】疫学研究 '地域がん登録'に基づく胃がん登録率の状況と課題

加茂 憲一, 片野田 耕太

日本臨床 ( (株)日本臨床社 )  66 ( 増刊5 胃癌 ) 57 - 61  2008年07月

担当区分：   筆頭著者

Asymptotic forms of positive solutions of quasilinear ordinary differential equations with singular nonlinearities

Ken-ichi Kamo, Hiroyuki Usami

NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS ( PERGAMON-ELSEVIER SCIENCE LTD )  68 ( 6 ) 1627 - 1639  2008年03月  [査読有り]

担当区分：   筆頭著者  , 責任著者

　概要を見る

In this paper we consider positive solutions of second order quasilinear ordinary differential equations with singular nonlinearities. We obtain asymptotic equivalence theorems for asymptotically superlinear solutions and decaying solutions. By using these theorems, exact asymptotic forms of such solutions are determined. Furthermore, we can establish the uniqueness of decaying solutions as an application of our results. (C) 2007 Elsevier Ltd. All rights reserved.

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Probability estimation of snow damage on sugi (Cryptomeria japonica) forest stands by logistic regression model in Toyama prefecture, Japan

K.Kamo, H.Yanagihara, A.Kato, A.Yoshimoto

Journal of Forest Science   24 ( 3 ) 125 - 130  2008年  [査読有り]

Cancer incidence and incidence rates in Japan in 2001 based on the data from 10 population-based cancer registries

Tomomi Marugame, Tomohiro Matsuda, Ken-Ichi Kamo, Kota Katanoda, Wakiko Ajiki, Tomotaka Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  37 ( 11 ) 884 - 891  2007年11月  [査読有り]

DOI

全国罹患数推定方法の比較(Comparison of method estimating nation-wide cancer incidence)

加茂 憲一, 丸亀 知美, 片野田 耕太, 松田 智大, 平林 由香, 味木 和喜子, 祖父江 友孝

日本癌学会総会記事 ( (一社)日本癌学会 )  66回   515 - 515  2007年08月

15地域がん登録1993-2002年累積データに基づく悪性軟部腫瘍罹患の状況(Incidence patterns of soft tissue sarcoma in Japan from Japan population-based cancer registry in 1993-2002)

片野田 耕太, 丸亀 知美, 松田 智大, 平林 由香, 加茂 憲一, 味木 和喜子, 祖父江 友孝

日本癌学会総会記事 ( (一社)日本癌学会 )  66回   516 - 516  2007年08月

The Japan cancer surveillance report: Incidence of childhood, bone, penis and testis cancers

Tomomi Marugame, Kota Katanoda, Tomohiro Matsuda, Yuka Hirabayashi, Ken-ichi Kamo, Wakiko Ajiki, Tomotaka Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  37 ( 4 ) 319 - 323  2007年04月  [査読有り]

DOI

A mathematical estimation of true cancer incidence using data from population-based cancer registries

Ken-ichi Kamo, Satoshi Kaneko, Kenichi Satoh, Hirokazu Yanagihara, Shoichi Mizuno, Tomotaka Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  37 ( 2 ) 150 - 155  2007年02月  [査読有り]

担当区分：   筆頭著者  , 責任著者

　概要を見る

Background: Accurate cancer incidence data are needed to plan, monitor and evaluate national cancer control programs. In Japan, however, such information is not available owing to incomplete cancer registries. In order to attain incidence estimation adjusted to account for this incomplete information, we have developed a new method. Methods: We developed a nonlinear regression model between observed incidence/mortality ratios and proportions of death certificate notification to observed incidence in various cancer registries. This model enables us to obtain the 'true incidence/mortality ratio', which, in the regression curve, is at zero point for the proportion of death certificate notifications. This is an ideal registration state without any missing cases. By multiplying it by the number of cancer mortalities from the National Vital Statistics, corrected cancer incidence can be estimated. Results: Applying this method for the estimation of the Japanese cancer incidence in 1997, we obtained the 'true incidence/mortality ratios' of 2.074 for men and 2.587 for women. Cancer incidences in Japan for 1997 were thus estimated to be 346 000 for men and 280 000 for women. Conclusions: A new method is proposed to estimate the national cancer incidence after adjusting for completeness of cancer registries. This method enables us to more accurately estimate the cancer incidence in a country where several cancer registries exist with various degrees of completeness of registration.

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ASYMPTOTIC FORMS OF WEAKLY INCREASING POSITIVE SOLUTIONS FOR QUASILINEAR ORDINARY DIFFERENTIAL EQUATIONS

Ken-Ichi Kamo, Hiroyuki Usami

ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS ( TEXAS STATE UNIV )  126   1 - 12  2007年  [査読有り]

担当区分：   筆頭著者  , 責任著者

　概要を見る

Asymptotic forms are determined for positive solutions which are called weakly increasing solutions to quasilinear ordinary differential equations.

Study of the effect of vaccination on periodic structures of measles epidemics in Japan

Ayako Sumi, Ken-ichi Kam, Norio Ohtomo, Nobumichi Kobayashi

MICROBIOLOGY AND IMMUNOLOGY ( CENTER ACADEMIC PUBL JAPAN )  51 ( 9 ) 805 - 814  2007年  [査読有り]

　概要を見る

The purpose of this paper is to investigate the effect of vaccination on periodic structures of measles epidemics in Japan. We carried out spectral analysis for time series data of measles notifications collected in Japan. It was confirmed that the interepidemic period, which corresponds to the interval between major epidemics of measles, increases as the vaccination ratio increases. This result was supported by a theory based on a mathematical model for epidemics of infectious diseases. It was suggested that the interepidernic period is useful to estimate the effect of vaccination on measles incidences quantitatively.

Cancer incidence and incidence rates in Japan in 2000: Estimates based on data from 11 population-based cancer registries

Tomomi Marugame, Ken-Ichi Kamo, Kota Katanoda, Wakiko Ajiki, Tomotaka Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  36 ( 10 ) 668 - 675  2006年10月  [査読有り]

DOI

地域がん登録に基づく全国罹患数推定値の登録率

加茂 憲一, 丸亀 知美, 片野田 耕太, 味木 和喜子, 祖父江 友孝

日本癌学会総会記事 ( (一社)日本癌学会 )  65回   286 - 286  2006年09月

15地域がん登録1993-2001年累積データに基づく若年層(15-39歳)のがん罹患の検討

丸亀 知美, 片野田 耕太, 松田 智大, 加茂 憲一, 味木 和喜子, 祖父江 友孝

日本癌学会総会記事 ( (一社)日本癌学会 )  65回   524 - 524  2006年09月

15地域がん登録1993-2001年累積データに基づく口唇・口腔・咽頭がん罹患の状況

片野田 耕太, 丸亀 知美, 松田 智大, 加茂 憲一, 味木 和喜子, 祖父江 友孝

日本癌学会総会記事 ( (一社)日本癌学会 )  65回   524 - 524  2006年09月

Trends in smoking by birth cohorts born between 1900 and 1977 in Japan

T Marugame, K Kamo, T Sobue, S Akiba, S Mizuno, H Satoh, T Suzuki, K Tajima, A Tamakoshi, S Tsugane

PREVENTIVE MEDICINE ( ACADEMIC PRESS INC ELSEVIER SCIENCE )  42 ( 2 ) 120 - 127  2006年02月  [査読有り]

　概要を見る

Background. The present study aimed to elucidate the changing patterns of smoking among successive birth cohorts in Japan. Methods. Birth-cohort-specific smoking prevalence was estimated for birth cohorts bom from 1900 to 1952, using data pooled from four prospective studies (242,330 men and 274,075 women), and for birth cohorts bom from 1925 to 1977, using National Nutrition Survey data. Results. For men, two peaks were observed in smoking prevalence, in the 1925 and late-1950s birth cohorts, while a trough was observed for the 1938 birth cohort. For women, ever smoking prevalence was lowest among the 1930s birth cohorts. After the female 1940s birth cohorts, no peak was observed until the end of our observations, the 1970s birth cohorts. Although Japanese women have historically tended to start smoking at later ages, recently, smoking habits have widely expanded among females in young birth cohorts. Conclusions. Smoking trends in Japanese men and women vary by birth cohorts. Smoking cessation should continue to be strongly promoted among men, although the younger generation has widely adopted a nonsmoking lifestyle. For women, efforts for preventing the onset of smoking, while necessary among the younger generation, should even be enhanced among middle-aged women. (c) 2005 Elsevier Inc. All rights reserved.

DOI

日本におけるがん生涯リスク評価

加茂 憲一, 金子 聰, 吉村 公雄, 祖父江 友孝

厚生の指標 ( (一財)厚生労働統計協会 )  52 ( 6 ) 21 - 26  2005年06月  [査読有り]

担当区分：   筆頭著者  , 責任著者

　概要を見る

わが国における生涯がん罹患(死亡)リスクと,年齢を限定しての累積リスクを推定した.生涯がん罹患(死亡)リスクとは,一生涯のうちにがんに罹患(死亡)する確率の推定値である.また年齢を限定しての累積リスクとは,がん未発症年齢と到達年齢を限定しての罹患(死亡)確率の推定値である.1999年の生涯リスクから,男性の約半分,女性の3人に1人ががんに罹患し,男性の3人に1人,女性の4人に1人ががんにより死亡する.経年的にも生涯リスクは増加し,この指標により今日のがんリスクの高さが直感的でとらえやすい形になったと考えられる.がん未発症年齢と到達年齢を限定してのリスク表から今後のリスクの変遷を知ることができる点も,国民にとってこの指標はリスクを直感的に認識しやすいものにしたと考えられた

Trends in lung cancer mortality among young adults in Japan

T Marugame, Yoshimi, I, K Kamo, Y Imamura, S Kaneko, S Mizuno, T Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  35 ( 4 ) 177 - 180  2005年04月

　概要を見る

Background: Trends in lung cancer mortality among young adults, which are important for projecting future trends, have not been explored previously in Japan. Methods: Using data from the National Vital Statistics between 1958 and 2003, we compiled lung cancer mortality by sex and 5-year birth cohort among young adults aged 20-49. Results: Mortality among those aged 20-29 has consistently decreased regardless of sex. There were birth cohort effects in mortality from lung cancer, although these were less evident among women than among men. Both men and women born in the 1930s had lower mortality rates, while those born after 1940 had higher lung cancer mortality rates. Mortality rates appear to be declining for male birth cohorts born after 1950 and female birth cohorts after 1960, although these trends may not be stable due to the small number of deaths in these cohorts. Conclusion: Lung cancer mortality trends appear to be decreasing among young adults. This might be associated with the lower mortality of birth cohorts after 1950 for men and the 1960s birth cohorts for women. Careful monitoring is needed to confirm continuation of these declining trends.

DOI PubMed CiNii

Mortality trend of prostate, breast, uterus, ovary, bladder and "kidney and other urinar tract" cancer in Japan by birth cohort

K Kamo, T Sobue

JAPANESE JOURNAL OF CLINICAL ONCOLOGY ( OXFORD UNIV PRESS )  34 ( 9 ) 561 - 563  2004年09月

DOI

わが国の出生コホート別喫煙割合の推移

丸亀 知美, 加茂 憲一, 祖父江 友孝, 秋葉 澄伯, 水野 正一, 玉腰 暁子, 佐藤 洋, 鈴木 隆一郎, 田島 和雄, 津金 昌一郎

日本癌学会総会記事 ( (一社)日本癌学会 )  63回   542 - 542  2004年09月