Department of Health Policy and Management

Research Output

Young adult breast cancer patients have a poor prognosis independent of prognostic clinicopathological factors: a study from the Japanese Breast Cancer Registry

Kataoka, A., Iwamoto, T., Tokunaga, E., Tomotaki, A., Kumamaru, H., Miyata, H., Niikura, N., Kawai, M., Anan, K., Hayashi, N., Masuda, S., Tsugawa, K., Aogi, K., Ishida, T., Masuoka, H., Iijima, K., Kinoshita, T., Nakamura, S. & Tokuda, Y., 2016 Nov 1, In : Breast Cancer Research and Treatment. 160, 1, p. 163-172 10 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Why medical care costs in Japan have increased despite declining prices for pharmaceuticals

Ikegami, N., 1998 Jan 1, In : PharmacoEconomics. 14, SUPPL. 1, p. 97-105 9 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Why has the use of health economic evaluation in Japan lagged behind that in other developed countries?

Ikegami, N., Drummond, M., Fukuhara, S., Nishimura, S., Torrance, G. W. & Schubert, F., 2002 Sep 27, In : PharmacoEconomics. 20, SUPPL. 2, p. 1-7 7 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Which patients are candidates for minimally invasive mitral valve surgery? Establishment of risk calculators using national clinical database

Japan Cardiovascular Surgery Database Organization, 2019, In : Circulation Journal. 83, 8, p. 1674-1681 8 p.

Research output: Contribution to journalArticle

Open Access
2 Citations (Scopus)

Where should women deliver babies in Japan?

Ikegami, N. & Yoshimura, Y., 2000 May 31, In : Journal of the American Medical Association. 283, 20, p. 2712-2714 3 p.

Research output: Contribution to journalEditorial

1 Citation (Scopus)

Verification of Data Accuracy in Japan Congenital Cardiovascular Surgery Database Including Its Postprocedural Complication Reports

Takahashi, A., Kumamaru, H., Tomotaki, A., Matsumura, G., Fukuchi, E., Hirata, Y., Murakami, A., Hashimoto, H., Ono, M. & Miyata, H., 2018 Mar 1, In : World journal for pediatric & congenital heart surgery. 9, 2, p. 150-156 7 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
45 Citations (Scopus)
3 Citations (Scopus)

Validation of the board certification system for expert surgeons (hepato-biliary-pancreatic field) using the data of the National Clinical Database of Japan: part 1 - Hepatectomy of more than one segment

Miura, F., Yamamoto, M., Gotoh, M., Konno, H., Fujimoto, J., Yanaga, K., Kokudo, N., Yamaue, H., Wakabayashi, G., Seto, Y., Unno, M., Miyata, H., Hirahara, N. & Miyazaki, M., 2016 Jun 1, In : Journal of Hepato-Biliary-Pancreatic Sciences. 23, 6, p. 313-323 11 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)

Validation of the board certification system for expert surgeons (hepato-biliary-pancreatic field) using the data of the National Clinical Database of Japan: part 2 – Pancreatoduodenectomy

Miura, F., Yamamoto, M., Gotoh, M., Konno, H., Fujimoto, J., Yanaga, K., Kokudo, N., Yamaue, H., Wakabayashi, G., Seto, Y., Unno, M., Miyata, H., Hirahara, N. & Miyazaki, M., 2016 Jun 1, In : Journal of Hepato-Biliary-Pancreatic Sciences. 23, 6, p. 353-363 11 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)

Utility-based evaluation of the quality of life of patient's with gastric cancer who receive chemotherapy: Comparison of patients' quality of life between oral TS-1 and conventional injectable combination therapy

Shimizu, H., Tanaka, K., Ikeda, S., Sakamaki, H., Yajima, S., Ikegami, N. & Murayama, J. I., 2008 May 1, In : Yakugaku Zasshi. 128, 5, p. 783-793 11 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Using previous medication adherence to predict future adherence

Kumamaru, H., Lee, M. P., Choudhry, N. K., Dong, Y. H., Krumme, A. A., Khan, N., Brill, G., Kohsaka, S., Miyata, H., Schneeweiss, S. & Gagne, J. J., 2018 Nov 1, In : Journal of Managed Care and Specialty Pharmacy. 24, 11, p. 1146-1155 10 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Use of the National Clinical Database to evaluate the association between preoperative liver function and postoperative complications among patients undergoing hepatectomy

Kubota, K., Aoki, T., Kumamaru, H., Shiraki, T., Miyata, H., Seto, Y., Kakeji, Y. & Yamamoto, M., 2019 Jan 1, In : Journal of Hepato-Biliary-Pancreatic Sciences. 26, 8, p. 331-340 10 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Use of renin-angiotensin system inhibitors after coronary interventions in patients with the guideline-based indications: A report from a Japanese multicenter registry

Ikemura, N., Sawano, M., Miyata, H., Ueda, I., Numasawa, Y., Noma, S., Suzuki, M., Momiyama, Y., Maekawa, Y., Fukuda, K. & Kosaka, S., 2016 Dec 15, In : International Journal of Cardiology. 225, p. 362-364 3 p.

Research output: Contribution to journalArticle

Use of physical restraints and antipsychotic medications in nursing homes: A cross-national study

Feng, Z., Hirdes, J. P., Smith, T. F., Finne-Soveri, H., Chi, I., Du Pasquier, J. N., Gilgen, R., Ikegami, N. & Mor, V., 2009 Oct 1, In : International Journal of Geriatric Psychiatry. 24, 10, p. 1110-1118 9 p.

Research output: Contribution to journalArticle

100 Citations (Scopus)

Use of oral antidiabetic drugs in Japanese working-age patients with type 2 diabetes mellitus: dosing pattern for metformin initiators

Kameda, T., Kumamaru, H., Nishimura, S., Kohsaka, S. & Miyata, H., 2020 May 3, In : Current Medical Research and Opinion. 36, 5, p. 749-756 8 p.

Research output: Contribution to journalArticle

Use of national clinical database for research activities

Kumamaru, H., Takahashi, A., Fukuchi, E., Hirahara, N. & Miyata, H., 2016, In : Japanese Pharmacology and Therapeutics. 44, p. s17-s22

Research output: Contribution to journalReview article

Use of intra-aortic balloon pump in a Japanese multicenter percutaneous coronary intervention registry

Inohara, T., Miyata, H., Ueda, I., Maekawa, Y., Fukuda, K. & Kosaka, S., 2015 Dec 1, In : JAMA Internal Medicine. 175, 12, p. 1980-1982 3 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)
2 Citations (Scopus)

Two cohort and three independent anonymous twin projects at the Keio Twin Research Center (KoTReC)

Ando, J., Fujisawa, K. K., Shikishima, C., Hiraishi, K., Nozaki, M., Yamagata, S., Takahashi, Y., Ozaki, K., Suzuki, K., Deno, M., Sasaki, S., Toda, T., Kobayashi, K., Sugimoto, Y., Okada, M., Kijima, N., Ono, Y., Yoshimura, K., Kakihana, S., Maekawa, H. & 4 others, Kamakura, T., Nonaka, K., Kato, N. & Ooki, S., 2013 Feb, In : Twin Research and Human Genetics. 16, 1, p. 202-216 15 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Treatment indications for sarcopenia: A systematic review of exercise intervention effect

Miyachi, M., Ando, D., Oida, Y., Oguma, Y., Ono, R., Kitabatake, Y., Tanaka, K., Nishiwaki, Y., Michikawa, T., Yanagita, M., Yoshimura, K. & Takebayashi, T., 2011 Mar 18, In : Japanese Journal of Geriatrics. 48, 1, p. 51-54 4 p.

Research output: Contribution to journalReview article

3 Citations (Scopus)

Toward quality improvement of thoracic aortic surgery: estimating volume-outcome effect from nationwide survey

Miyata, H., Motomura, N., Ueda, Y., Tsukihara, H., Tabayashi, K. & Takamoto, S., 2009 Sep, In : European Journal of Cardio-thoracic Surgery. 36, 3, p. 517-521 5 p.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Toward quality improvement of cardiovascular surgery in Japan: An estimation of regionalization effects from a nationwide survey

Miyata, H., Motomura, N., Kondo, M. J., Fushimi, K., Ishikawa, K. B. & Takamoto, S., 2009 Aug, In : Health Policy. 91, 3, p. 246-251 6 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Time to Reconsider Diverse Ways of Working in Japan to Promote Social Distancing Measures against the COVID-19

Nomura, S., Yoneoka, D., Tanoue, Y., Kawashima, T., Shi, S., Eguchi, A. & Miyata, H., 2020 Aug 1, In : Journal of Urban Health. 97, 4, p. 457-460 4 p.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)

Thoracic and cardiovascular surgeries in Japan during 2017: Annual report by the Japanese Association for Thoracic Surgery

Committee for Scientific Affairs, The Japanese Association for Thoracic Surgery, 2020 Apr 1, In : General thoracic and cardiovascular surgery. 68, 4, p. 414-449 36 p.

Research output: Contribution to journalReview article

Open Access
6 Citations (Scopus)

The World Health report 2008 - Primary healthcare: How wide is the gap between its agenda and implementation in 12 high-income health systems?

Gauld, R., Blank, R., Burgers, J., Cohen, A. B., Dobrow, M. K., Ikegami, N. K. I., Kwon, S., Luxford, K., Milett, C. & Wendt, C., 2012 Feb 1, In : Healthcare Policy. 7, 3, p. 38-58 21 p.

Research output: Contribution to journalReview article

21 Citations (Scopus)

The total urine protein-to-creatinine ratio can predict the presence of microalbuminuria

Yamamoto, K., Yamamoto, H., Yoshida, K., Niwa, K., Nishi, Y., Mizuno, A., Kuwabara, M., Asano, T., Sakoda, K., Niinuma, H., Nakahara, F., Takeda, K., Shindoh, C. & Komatsu, Y., 2014 Mar 10, In : PloS one. 9, 3, e91067.

Research output: Contribution to journalArticle

14 Citations (Scopus)

The paradox of decreasing prices and increasing costs for diagnostic tests, imaging, and drugs in Japan

Ikegami, N. & Ikeda, S., 1997 Jan 1, In : International Journal of Technology Assessment in Health Care. 13, 1, p. 99-110 12 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

The national clinical database as an initiative for quality improvement in Japan

Murakami, A., Hirata, Y., Motomura, N., Miyata, H., Iwanaka, T. & Takamoto, S., 2014, In : Korean Journal of Thoracic and Cardiovascular Surgery. 47, 5, p. 437-443 7 p.

Research output: Contribution to journalReview article

15 Citations (Scopus)

The Japanese health system. Another success story?

Ikegami, N., 1984 Dec 1, In : Hospital Health Services Review. 80, 6, p. 261-264 4 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

The Japanese health care system--Achieving equity and containing costs through a single payment system.

Ikegami, N., 2007 Jan 1, In : The American heart hospital journal. 5, 1, p. 27-31 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

The impact of legislation on psychotropic drug use in nursing homes: A cross-national perspective

Hughes, C. M., Lapane, K. L., Mor, V., Ikegami, N., Jonsson, P. V., Ljunggren, G. & Sgadari, A., 2000, In : Journal of the American Geriatrics Society. 48, 8, p. 931-937 7 p.

Research output: Contribution to journalArticle

53 Citations (Scopus)

The health economics of diabetes

Ikegami, N., 2001 Jan 1, In : Folia Ophthalmologica Japonica. 52, 1, p. 4-9 6 p.

Research output: Contribution to journalArticle

The Generality of Personality Heritability: Big-Five Trait Heritability Predicts Response Time to Trait Items

Ekehammar, B., Akrami, N., Hedlund, L. E., Yoshimura, K., Ono, Y., Ando, J. & Yamagata, S., 2010 Oct 15, In : Journal of Individual Differences. 31, 4, p. 209-214 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

The estimated cost of dementia in Japan, the most aged society in the world

Sado, M., Ninomiya, A., Shikimoto, R., Ikeda, B., Baba, T., Yoshimura, K. & Mimura, M., 2018 Nov, In : PloS one. 13, 11, e0206508.

Research output: Contribution to journalArticle

9 Citations (Scopus)

The Effects of Direct Oral Anticoagulants, Warfarin, Aspirin and Thienopyridine on the Performance of Immunochemical, Faecal, Occult Blood Tests

Niikura, R., Yamada, A., Fujishiro, M., Tanaka, K., Matsuda, K., Saito, Y., Ohtsuka, K., Oda, I., Katada, C., Kato, M., Kida, M., Kobayashi, K., Hoteya, S., Horimatsu, T., Kodashima, S., Matsuda, T., Muto, M., Yamamoto, H., Ryozawa, S., Iwakiri, R. & 10 others, Kutsumi, H., Miyata, H., Kato, M., Haruma, K., Fujimoto, K., Uemura, N., Kaminishi, M., Shinozaki, T., Tajiri, H. & Koike, K., 2019 Aug 1, In : Digestion. 100, 2, p. 117-126 10 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

The effect of body weight in infants undergoing ventricular septal defect closure: A report from the Nationwide Japanese Congenital Surgical Database

Inohara, T., Ichihara, N., Kohsaka, S., Miyata, H., Hirata, Y., Murakami, A., Shimizu, H. & Aeba, R., 2019 Mar 1, In : Journal of Thoracic and Cardiovascular Surgery. 157, 3, p. 1132-1141.e7

Research output: Contribution to journalArticle

3 Citations (Scopus)

The economics of health care in Japan

Ikegami, N., 1992 Jan 1, In : Science. 258, 5082, p. 614-618 5 p.

Research output: Contribution to journalArticle

30 Citations (Scopus)

The diffusion of medical technology, local conditions, and technology re-invention: A comparative case study on coronary stenting

Hashimoto, H., Noguchi, H., Heidenreich, P., Saynina, O., Moreland, A., Miyazaki, S., Ikeda, S., Kaneko, Y. & Ikegami, N., 2006 Dec, In : Health Policy. 79, 2-3, p. 221-230 10 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

The development and use of quality-of-life measures to evaluate health outcomes in Japan

Fukuhara, S., Ikegami, N., Torrance, G. W., Nishimura, S., Drummond, M. & Schubert, F., 2002, In : PharmacoEconomics. 20, SUPPL. 2, p. 17-23 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

The cost of schizophrenia in Japan

Sado, M., Inagaki, A., Koreki, A., Knapp, M., Kissane, L. A., Mimura, M. & Yoshimura, K., 2013 Jun 6, In : Neuropsychiatric Disease and Treatment. 9, p. 787-798 12 p.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Taxane-based combinations as adjuvant chemotherapy for node-positive ER-positive breast cancer based on 2004–2009 data from the Breast Cancer Registry of the Japanese Breast Cancer Society

Hojo, T., Masuda, N., Iwamoto, T., Niikura, N., Anan, K., Aogi, K., Ohnishi, T., Yamauchi, C., Yoshida, M., Kinoshita, T., Masuoka, H., Sagara, Y., Sakatani, T., Kojima, Y., Tsuda, H., Kumamaru, H., Miyata, H. & Nakamura, S., 2020 Jan 1, In : Breast Cancer. 27, 1, p. 85-91 7 p.

Research output: Contribution to journalArticle

Targeting and quality of nursing home care. A five-nation study

Carpenter, G. I., Hirdes, J. P., Ribbe, M. W., Ikegami, N., Challis, D., Steel, K., Bernabei, R. & Fries, B., 1999 Apr 1, In : Aging Clinical and Experimental Research. 11, 2, p. 83-89 7 p.

Research output: Contribution to journalArticle

22 Citations (Scopus)

Survey of the general public's attitudes toward advance directives in Japan: How to respect patients' preferences

Miyata, H., Shiraishi, H. & Kai, I., 2006 Oct 18, In : BMC Medical Ethics. 7, 11.

Research output: Contribution to journalReview article

35 Citations (Scopus)

Surgical risk and benefits of laparoscopic surgery for elderly patients with gastric cancer: a multicenter prospective cohort study

Honda, M., Kumamaru, H., Etoh, T., Miyata, H., Yamashita, Y., Yoshida, K., Kodera, Y., Kakeji, Y., Inomata, M., Konno, H., Seto, Y., Kitano, S., Watanabe, M. & Hiki, N., 2019 Jul 12, In : Gastric Cancer. 22, 4, p. 845-852 8 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Surgical repair of post-infarction ventricular septal defect ― findings from a Japanese national database ―

Sakaguchi, G., Miyata, H., Motomura, N., Ueki, C., Fukuchi, E., Yamamoto, H., Takamoto, S. & Marui, A., 2019, In : Circulation Journal. 83, 11, p. 2229-2235 7 p.

Research output: Contribution to journalArticle

Open Access
2 Citations (Scopus)
Open Access
3 Citations (Scopus)

Surgical outcomes of laparoscopic distal gastrectomy compared to open distal gastrectomy: A retrospective cohort study based on a nationwide registry database in Japan

Yoshida, K., Honda, M., Kumamaru, H., Kodera, Y., Kakeji, Y., Hiki, N., Etoh, T., Miyata, H., Yamashita, Y., Seto, Y., Kitano, S. & Konno, H., 2018 Jan 1, In : Annals of Gastroenterological Surgery. 2, 1, p. 55-64 10 p.

Research output: Contribution to journalArticle

Open Access
19 Citations (Scopus)

Surgical outcomes of gastroenterological surgery in Japan: Report of the National Clinical Database 2011-2017

Hasegawa, H., Takahashi, A., Kakeji, Y., Ueno, H., Eguchi, S., Endo, I., Sasaki, A., Takiguchi, S., Takeuchi, H., Hashimoto, M., Horiguchi, A., Masaki, T., Marubashi, S., Yoshida, K., Konno, H., Gotoh, M., Miyata, H. & Seto, Y., 2019 Jul, In : Annals of Gastroenterological Surgery. 3, 4, p. 426-450 25 p.

Research output: Contribution to journalArticle

Open Access
12 Citations (Scopus)