Hayami Koga

Biography

Publications

• Work Unit Conditions and Emotional Exhaustion: A Multilevel Study of Healthcare Workers.

  Koga HK, McNamara TK, Kelly EL, Kubzansky LD, Berkman LF. J Occup Environ Med 2026 Mar 01

  PMID: 41105124

• The distribution of optimism across sociodemographic groups in 22 countries.

  Chen Y, Kubzansky LD, Kim ES, Koga H, Shiba K, Padgett RN, Wilkinson R, Johnson BR, VanderWeele TJ. Sci Rep 2025 Apr 30

  PMID: 40307250

• When the glass is half full: early life experiences and adult optimism in 22 countries.

  Chen Y, Kubzansky LD, Kim ES, Koga H, Shiba K, Padgett RN, Wilkinson R, Johnson BR, VanderWeele TJ. Npj Ment Health Res 2025 Apr 30

  PMID: 40307504

• The Global Flourishing Study: Study Profile and Initial Results on Flourishing.

  VanderWeele TJ, Johnson BR, Bialowolski PT, Bonhag R, Bradshaw M, Breedlove T, Case B, Chen Y, Chen ZJ, Counted V, Cowden RG, de la Rosa PA, Felton C, Fogleman A, Gibson C, Grigoropoulou N, Gundersen C, Jang SJ, Johnson KA, Kent BV, Kim ES, Kim YI, Koga HK, Lee MT, Le Pertel N, Lomas T, Long KNG, Macchia L, Makridis CA, Markham L, Nakamura JS, Norman-Krause N, Okafor CN, Okuzono SS, Ouyang ST, Padgett RN, Paltzer J, Ritchie-Dunham JL, Ritter Z, Shiba K, Srinivasan R, Ssozi J, Weziak-Bialowolska D, Wilkinson R, Woodberry RD, Wortham J, Yancey G. Nat Ment Health 2026

  PMID: 40521104

• Limitations for Assessing Optimism and Physical Functioning in Women-Reply.

  Koga HK, Manson JE, Kubzansky LD. JAMA Psychiatry 2024 Sep 01

  PMID: 39046712