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1. Breast cancer statistics for Japan in 2022: annual report of the national clinical database-breast cancer registry—clinical implications including chemosensitivity of breast cancer with low estrogen receptor expression

Author

Nagahashi, Masayuki, Kumamaru, Hiraku, Kinukawa, Naoko, Iwamoto, Takayuki, Kawashima, Masahiro, Kinoshita, Takayuki, Konishi, Takaaki, Sagara, Yasuaki, Sasada, Shinsuke, Saji, Shigehira, Sanuki, Naoko, Tanakura, Kenta, Niikura, Naoki, Miyashita, Minoru, Yoshida, Masayuki, Ishida, Takanori, and Taira, Naruto

Published
2025
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2. Thoracic and cardiovascular surgeries in Japan during 2022: Annual report by the Japanese Association for Thoracic Surgery

Author

Yoshimura, Naoki, Sato, Yukio, Takeuchi, Hiroya, Abe, Tomonobu, Yoshikawa, Toyofumi Fengshi, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Minatoya, Kenji, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Tsuchida, Masanori, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Toh, Yasushi, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Matsumiya, Goro, Sawa, Yoshiki, Shimizu, Hideyuki, and Chida, Masayuki

Published
2025
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3. Correction: Thoracic and cardiovascular surgeries in Japan during 2021: Annual report by the Japanese Association for Thoracic Surgery

Author

Yoshimura, Naoki, Sato, Yukio, Takeuchi, Hiroya, Abe, Tomonobu, Endo, Shunsuke, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Minatoya, Kenji, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Tsuchida, Masanori, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Toh, Yasushi, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Matsumiya, Goro, Sawa, Yoshiki, Shimizu, Hideyuki, and Chida, Masayuki

Published
2025
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5. Correction: Thoracic and cardiovascular surgeries in Japan during 2020: Annual report by the Japanese Association for Thoracic Surgery

Author

Matsumiya, Goro, Sato, Yukio, Takeuchi, Hiroya, Abe, Tomonobu, Endo, Shunsuke, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Minatoya, Kenji, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Shimizu, Hideyuki, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Toh, Yasushi, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Yoshimura, Naoki, Tsuchida, Masanori, and Sawa, Yoshiki

Published
2025
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8. Thoracic and cardiovascular surgeries in Japan during 2021: Annual report by the Japanese Association for Thoracic Surgery

Author

Yoshimura, Naoki, Sato, Yukio, Takeuchi, Hiroya, Abe, Tomonobu, Endo, Shunsuke, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Minatoya, Kenji, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Tsuchida, Masanori, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Toh, Yasushi, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Matsumiya, Goro, Sawa, Yoshiki, Shimizu, Hideyuki, and Chida, Masayuki

Published
2024
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10. Pulse Oximetry Screening: Association of State Mandates with Emergency Hospitalizations.

Author

Kumamaru, Hiraku, Marr, Emily, Bedel, Lauren, Mena, Laurie, Baghaee, Anita, Nguyen, Michael, Estevez, Dennys, Wu, Frank, Chang, Ruey-Kang, and Sakai-Bizmark, Rie

Subjects
Birth defects, CCHD, Congenital heart disease, Critical congenital heart disease, Pulse oximetry screening, Racial/ethnic disparity, Infant, Newborn, Infant, Humans, Female, Neonatal Screening, Heart Defects, Congenital, Hospitalization, Oximetry, New York
Abstract

We evaluated the association between implementation of state-mandated pulse oximetry screening (POS) and rates of emergency hospitalizations among infants with Critical Congenital Heart Disease (CCHD) and assessed differences in that association across race/ethnicity. We hypothesized that emergency hospitalizations among infants with CCHD decreased after implementation of mandated POS and that the reduction was larger among racial and ethnic minorities compared to non-Hispanic Whites. We utilized statewide inpatient databases from Arizona, California, Kentucky, New Jersey, New York, and Washington State (2010-2014). A difference-in-differences model with negative binomial regression was used. We identified patients with CCHD whose hospitalizations between three days and three months of life were coded as emergency or urgent or occurred through the emergency department. Numbers of emergency hospitalizations aggregated by month and state were used as outcomes. The intervention variable was an implementation of state-mandated POS. Difference in association across race/ethnicity was evaluated with interaction terms between the binary variable indicating the mandatory policy period and each race/ethnicity group. The model was adjusted for state-specific variables, such as percent of female infants and percent of private insurance. We identified 9,147 CCHD emergency hospitalizations. Among non-Hispanic Whites, there was a 22% (Confidence Interval [CI] 6%-36%) decline in CCHD emergency hospitalizations after implementation of mandated POS, on average. This decline was 65% less among non-Hispanic Blacks compared to non-Hispanic Whites. Our study detected an attenuated association with decreased number of emergency hospitalizations among Black compared to White infants. Further research is needed to clarify this disparity.

Published
2023

14. No difference in the incidence of postoperative pulmonary complications between abdominal laparoscopy and laparotomy for minimally invasive thoracoscopic esophagectomy: a retrospective cohort study using a nationwide Japanese database

Author

Takeuchi, Masashi, Endo, Hideki, Kawakubo, Hirofumi, Matsuda, Satoru, Kikuchi, Hirotoshi, Kanaji, Shingo, Kumamaru, Hiraku, Miyata, Hiroaki, Ueno, Hideki, Seto, Yasuyuki, Watanabe, Masayuki, Doki, Yuichiro, and Kitagawa, Yuko

Published
2024
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15. Thoracic and cardiovascular surgeries in Japan during 2020: Annual report by the Japanese Association for Thoracic Surgery

Author

Matsumiya, Goro, Sato, Yukio, Takeuchi, Hiroya, Abe, Tomonobu, Endo, Shunsuke, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Minatoya, Kenji, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Shimizu, Hideyuki, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Toh, Yasushi, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Yoshimura, Naoki, Tsuchida, Masanori, and Sawa, Yoshiki

Published
2024
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17. Thoracic and cardiovascular surgeries in Japan during 2019: Annual report by the Japanese Association for Thoracic Surgery

Author

Minatoya, Kenji, Sato, Yukio, Toh, Yasushi, Abe, Tomonobu, Endo, Shunsuke, Hirata, Yasutaka, Ishida, Michiko, Iwata, Hisashi, Kamei, Takashi, Kawaharada, Nobuyoshi, Kawamoto, Shunsuke, Kohno, Kohji, Kumamaru, Hiraku, Matsumiya, Goro, Motomura, Noboru, Nakahara, Rie, Okada, Morihito, Saji, Hisashi, Saito, Aya, Shimizu, Hideyuki, Suzuki, Kenji, Takemura, Hirofumi, Taketani, Tsuyoshi, Takeuchi, Hiroya, Tatsuishi, Wataru, Yamamoto, Hiroyuki, Yasuda, Takushi, Watanabe, Masayuki, Yoshimura, Naoki, Tsuchida, Masanori, and Sawa, Yoshiki

Published
2023
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21. Reduced rate of postpartum readmissions among homeless compared with non-homeless women in New York: a population-based study using serial, cross-sectional data

Author

Sakai-Bizmark, Rie, Kumamaru, Hiraku, Estevez, Dennys, Neman, Sophia, Bedel, Lauren EM, Mena, Laurie A, Marr, Emily H, and Ross, Michael G

Subjects
Behavioral and Social Science, Clinical Research, Health Services, Homelessness, Reproductive health and childbirth, Good Health and Well Being, Cross-Sectional Studies, Female, Humans, Infant, Newborn, New York, Patient Readmission, Postpartum Period, Pregnancy, Quality of Life, obstetrics and gynaecology, health services research, womens health, Clinical Sciences, Public Health and Health Services, Curriculum and Pedagogy, Health Policy & Services
Abstract

ObjectiveTo assess differences in rates of postpartum hospitalisations among homeless women compared with non-homeless women.DesignCross-sectional secondary analysis of readmissions and emergency department (ED) utilisation among postpartum women using hierarchical regression models adjusted for age, race/ethnicity, insurance type during delivery, delivery length of stay, maternal comorbidity index score, other pregnancy complications, neonatal complications, caesarean delivery, year fixed effect and a birth hospital random effect.SettingNew York statewide inpatient and emergency department databases (2009-2014).Participants82 820 and 1 026 965 postpartum homeless and non-homeless women, respectively.Main outcome measuresPostpartum readmissions (primary outcome) and postpartum ED visits (secondary outcome) within 6 weeks after discharge date from delivery hospitalisation.ResultsHomeless women had lower rates of both postpartum readmissions (risk-adjusted rates: 1.4% vs 1.6%; adjusted OR (aOR) 0.87, 95% CI 0.75 to 1.00, p=0.048) and ED visits than non-homeless women (risk-adjusted rates: 8.1% vs 9.5%; aOR 0.83, 95% CI 0.77 to 0.90, p

Published
2022

22. Pulmonary Hypertension With Interstitial Pneumonia: Initial Treatment Effectiveness and Severity in a Japan Registry

Author

Tanabe, Nobuhiro, Kumamaru, Hiraku, Tamura, Yuichi, Kondoh, Yasuhiro, Nakayama, Kazuhiko, Kinukawa, Naoko, Kimura, Tomoki, Nishiyama, Osamu, Tsujino, Ichizo, Shigeta, Ayako, Morio, Yoshiteru, Inoue, Yoshikazu, Kuraishi, Hiroshi, Hirata, Ken-ichi, Tanaka, Kensuke, Kuwana, Masataka, Nagaoka, Tetsutaro, Handa, Tomohiro, Sugimura, Koichiro, Sakamaki, Fumio, Naito, Akira, Taniguchi, Yu, Matsubara, Hiromi, Hanaoka, Masayuki, Inami, Takumi, Hayama, Naoki, Nishimura, Yoshihiro, Kimura, Hiroshi, Miyata, Hiroaki, and Tatsumi, Koichiro

Published
2024
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31. Impact of the hospital volume and setting on postoperative complications of surgery for gastroenterological cancers in a regional area of Western Japan

Author

Kunisawa, Susumu, Ishida, Haku, Ikai, Hiroshi, Nagano, Hiroaki, Fujiwara, Toshiyoshi, Ohdan, Hideki, Fujiwara, Yoshiyuki, Tajima, Yoshitsugu, Ueno, Tomio, Fujiwara, Yoshinori, Shimada, Mitsuo, Suzuki, Yasuyuki, Watanabe, Yuji, Hanazaki, Kazuhiro, Kakeji, Yoshihiro, Kumamaru, Hiraku, Takahashi, Arata, Miyata, Hiroaki, and Imanaka, Yuichi

Published
2023
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36. Prognosis and effectiveness of chemotherapy for medullary breast carcinoma

Author

Aihara, Tomohiko, Kumamaru, Hiraku, Ishitobi, Makoto, Miyashita, Minoru, Miyata, Hiroaki, Tamura, Kenji, Yoshida, Masayuki, Ogo, Etsuyo, Nagahashi, Masayuki, Asaga, Sota, Kojima, Yasuyuki, Kadoya, Takayuki, Aogi, Kenjiro, Niikura, Naoki, Iijima, Kotaro, Hayashi, Naoki, Kubo, Makoto, Yamamoto, Yutaka, Takeuchi, Yoshinori, Imoto, Shigeru, and Jinno, Hiromitsu

Published
2022
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38. Clinicopathological features of male patients with breast cancer based on a nationwide registry database in Japan

Author

Shimomura, Akihiko, Nagahashi, Masayuki, Kumamaru, Hiraku, Aogi, Kenjiro, Asaga, Sota, Hayashi, Naoki, Iijima, Kotaro, Kadoya, Takayuki, Kojima, Yasuyuki, Kubo, Makoto, Miyashita, Minoru, Miyata, Hiroaki, Niikura, Naoki, Ogo, Etsuyo, Tamura, Kenji, Tanakura, Kenta, Yoshida, Masayuki, Yamamoto, Yutaka, Imoto, Shigeru, and Jinno, Hiromitsu

Published
2022
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40. Impact of pediatric cardiac surgery regionalization on health care utilization and mortality.

Author

Sakai-Bizmark, Rie, Mena, Laurie A, Kumamaru, Hiraku, Kawachi, Ichiro, Marr, Emily H, Webber, Eliza J, Seo, Hyun H, Friedlander, Scott IM, and Chang, Ruey-Kang R

Subjects
Humans, Heart Defects, Congenital, Postoperative Complications, Length of Stay, Cardiac Surgical Procedures, Hospital Mortality, Risk Factors, Time Factors, Adolescent, Child, Child, Preschool, Infant, Infant, Newborn, Regional Medical Programs, Risk Adjustment, Patient Acceptance of Health Care, United States, Female, Male, Hospitals, High-Volume, Hospitals, Low-Volume, case-volume, health care utilization, mortality, pediatric cardiology, Clinical Research, Pediatric, Cardiovascular, Heart Disease, Patient Safety, Good Health and Well Being, Public Health and Health Services, Policy and Administration, Health Policy & Services
Abstract

ObjectiveRegionalization directs patients to high-volume hospitals for specialized care. We investigated regionalization trends and outcomes in pediatric cardiac surgery.Data sources/study settingStatewide inpatient data from eleven states between 2000 and 2012.Study designMortality, length of stay (LOS), and cost were assessed using multivariable hierarchical regression with state and year fixed effects. Primary predictor was hospital case-volume, categorized into low-, medium-, and high-volume tertiles.Data collection/extraction methodsWe used Risk Adjustment for Congenital Heart Surgery-1 (RACHS-1) to select pediatric cardiac surgery discharges.Principal findingsIn total, 2841 (8.5 percent), 8348 (25.1 percent), and 22 099 (66.4 percent) patients underwent heart surgeries in low-, medium-, and high-volume hospitals. Mortality decreased over time, but remained higher in low- and medium-volume hospitals. High-volume hospitals had lower odds of mortality and cost than low-volume hospitals (odds ratio [OR] 0.59, P

Published
2019

45. Prediction Models for Two Year Overall Survival and Amputation Free Survival After Revascularisation for Chronic Limb Threatening Ischaemia

Author

Miyata, Tetsuro, Kumamaru, Hiraku, Mii, Shinsuke, Kinukawa, Naoko, Miyata, Hiroaki, Shigematsu, Kunihiro, Azuma, Nobuyoshi, Ishida, Atsuhisa, Izumi, Yuichi, Inoue, Yoshinori, Uchida, Hisashi, Ohki, Takao, Kuma, Sosei, Kurosawa, Koji, Kodama, Akio, Komai, Hiroyoshi, Komori, Kimihiro, Shibuya, Takashi, Shindo, Shunya, Sugimoto, Ikuo, Deguchi, Juno, Hoshina, Katsuyuki, Hideaki, Maeda, Midorikawa, Hirofumi, Yamaoka, Terutoshi, Yamashita, Hiroya, and Yunoki, Yasuhiro

Published
2022
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46. Surgical treatment trends and identification of primary breast tumors after surgery in occult breast cancer: a study based on the Japanese National Clinical Database—Breast Cancer Registry

Author

Terada, Mitsuo, Miyashita, Minoru, Kumamaru, Hiraku, Miyata, Hiroaki, Tamura, Kenji, Yoshida, Masayuki, Ogo, Etsuyo, Nagahashi, Masayuki, Asaga, Sota, Kojima, Yasuyuki, Kadoya, Takayuki, Aogi, Kenjiro, Niikura, Naoki, Iijima, Kotaro, Hayashi, Naoki, Kubo, Makoto, Yamamoto, Yutaka, and Jinno, Hiromitsu

Published
2022
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47. Prognostic impact of postoperative radiotherapy in patients with breast cancer and with pT1-2 and 1–3 lymph node metastases: A retrospective cohort study based on the Japanese Breast Cancer Registry

Author

Yamada, Akimitsu, Hayashi, Naoki, Kumamaru, Hiraku, Nagahashi, Masayuki, Usune, Shiori, Asaga, Sota, Iijima, Kotaro, Kadoya, Takayuki, Kojima, Yasuyuki, Kubo, Makoto, Miyashita, Minoru, Miyata, Hiroaki, Ogo, Etsuko, Tamura, Kenji, Tanakura, Kenta, Tada, Keiichiro, Niikura, Naoki, Yoshida, Masayuki, Ohno, Shinji, Ishikawa, Takashi, Narui, Kazutaka, Endo, Itaru, Imoto, Shigeru, and Jinno, Hiromitsu

Published
2022
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50. Short‐term outcomes of robot‐assisted versus conventional minimally invasive esophagectomy: A propensity score‐matched study via a nationwide database.

Author

Nishigori, Tatsuto, Kumamaru, Hiraku, Obama, Kazutaka, Suda, Koichi, Tsunoda, Shigeru, Yoda, Yukie, Hikage, Makoto, Shibasaki, Susumu, Tanaka, Tsuyoshi, Terashima, Masanori, Kakeji, Yoshihiro, Inomata, Masafumi, Kitagawa, Yuko, Miyata, Hiroaki, Sakai, Yoshiharu, Noshiro, Hirokazu, and Uyama, Ichiro

Subjects
PROPENSITY score matching, ESOPHAGEAL tumors, SURGICAL complications, PULMONARY embolism, DATABASES
Abstract

Background: The advantages of robot‐assisted minimally invasive esophagectomy (RA‐MIE) over conventional minimally invasive esophagectomy (C‐MIE) are unknown. This nationwide large‐scale study aimed to compare surgical outcomes between RA‐MIE and C‐MIE using rigorous propensity score methods, including detailed covariates and relevant outcomes. Methods: This Japanese nationwide retrospective cohort study included RA‐MIE or C‐MIE for esophageal malignant tumors performed between October 2018 and December 2019 and registered in the Japanese National Clinical Database. The primary outcome measure was postoperative complications classified as Clavien–Dindo Grade IIIa or higher. Propensity score matching was performed to create a balanced covariate distribution between the two groups. Results: After propensity score matching, 1092 patients were selected. The RA‐MIE group had a significantly longer operation time and greater blood loss than the C‐MIE group (565 vs. 477 min and 120 vs. 90 mL). Furthermore, the R0 resection rate was lower in the RA‐MIE group than in the C‐MIE group (95.1% vs. 97.8%). The RA‐MIE and C‐MIE groups had no differences regarding overall complications ≥ Grade IIIa (22.0% vs. 20.3%, p = 0.52), 30‐day mortality rates (0.4% vs. 0.5%), and operative mortality rates (0.7% vs. 0.7%). Deep SSI was less frequent (2.7% vs. 6.0%) and pulmonary embolism was more frequent (2.4% vs. 0.5%) in the RA‐MIE group than in the C‐MIE group. Conclusions: In the initial phase of implementation, RA‐MIE and C‐MIE demonstrated comparable morbidity rates when performed by skilled board‐certified endoscopic surgeons. [ABSTRACT FROM AUTHOR]

Published
2025
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