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D-Index & Metrics

Social Sciences and Humanities

D-Index
50
Citations
9078
World Ranking
2795
National Ranking
35

Ka-Fai Chung publication distribution in Social Sciences and Humanities in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Social Sciences and Humanities in 2026. The highlighted bar marks where Ka-Fai Chung sits on this spectrum.

44–53 publications: 28 scientists 54–63 publications: 61 scientists 64–73 publications: 161 scientists 74–83 publications: 225 scientists 84–93 publications: 301 scientists 94–103 publications: 390 scientists 104–113 publications: 406 scientists 114–123 publications: 474 scientists 124–133 publications: 453 scientists 134–143 publications: 434 scientists 144–153 publications: 407 scientists 154–163 publications: 411 scientists 164–173 publications: 391 scientists 174–183 publications: 313 scientists 184–193 publications: 319 scientists 194–203 publications: 304 scientists 204–213 publications: 285 scientists 214–223 publications: 246 scientists 224–233 publications: 213 scientists 234–243 publications: 170 scientists 244–253 publications: 167 scientists 254–263 publications: 162 scientists 264–273 publications: 138 scientists 274–283 publications: 138 scientists 284–293 publications: 113 scientists 294–303 publications: 106 scientists 304–313 publications: 95 scientists 314–323 publications: 101 scientists 324–333 publications: 81 scientists 334–343 publications: 69 scientists 344–353 publications: 56 scientists 354–363 publications: 36 scientists 364–373 publications: 42 scientists 374–383 publications: 41 scientists 384–393 publications: 44 scientists 394–403 publications: 27 scientists 404–413 publications: 30 scientists 414–423 publications: 20 scientists 424–433 publications: 29 scientists 434–443 publications: 29 scientists 444–453 publications: 25 scientists 454–463 publications: 19 scientists 464–473 publications: 21 scientists 474–483 publications: 11 scientists 484–493 publications: 17 scientists 494–503 publications: 7 scientists 504–513 publications: 6 scientists 514–523 publications: 12 scientists 524–533 publications: 10 scientists 534–543 publications: 7 scientists 544–553 publications: 6 scientists 554–563 publications: 12 scientists 564–569 publications: 8 scientists 570+ publications: 100 scientists
44 publications 570+

This scientist: 236 publications — 75th percentile

75% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 570 publications or more.

Ka-Fai Chung D-index placement in Social Sciences and Humanities in 2026

The chart shows the D-index (discipline H-index) distribution of Social Sciences and Humanities scientists ranked by Research.com in 2026. The highlighted bar marks where Ka-Fai Chung sits on this spectrum.

30 D-Index: 177 scientists 31 D-Index: 210 scientists 32 D-Index: 222 scientists 33 D-Index: 188 scientists 34 D-Index: 181 scientists 35 D-Index: 243 scientists 36 D-Index: 261 scientists 37 D-Index: 272 scientists 38 D-Index: 278 scientists 39 D-Index: 300 scientists 40 D-Index: 297 scientists 41 D-Index: 308 scientists 42 D-Index: 313 scientists 43 D-Index: 300 scientists 44 D-Index: 269 scientists 45 D-Index: 260 scientists 46 D-Index: 228 scientists 47 D-Index: 251 scientists 48 D-Index: 203 scientists 49 D-Index: 186 scientists 50 D-Index: 187 scientists 51 D-Index: 166 scientists 52 D-Index: 138 scientists 53 D-Index: 141 scientists 54 D-Index: 131 scientists 55 D-Index: 137 scientists 56 D-Index: 109 scientists 57 D-Index: 129 scientists 58 D-Index: 95 scientists 59 D-Index: 105 scientists 60 D-Index: 106 scientists 61 D-Index: 86 scientists 62 D-Index: 94 scientists 63 D-Index: 77 scientists 64 D-Index: 79 scientists 65 D-Index: 59 scientists 66 D-Index: 68 scientists 67 D-Index: 51 scientists 68 D-Index: 49 scientists 69 D-Index: 40 scientists 70 D-Index: 43 scientists 71 D-Index: 40 scientists 72 D-Index: 50 scientists 73 D-Index: 46 scientists 74 D-Index: 43 scientists 75 D-Index: 45 scientists 76 D-Index: 45 scientists 77 D-Index: 30 scientists 78 D-Index: 25 scientists 79 D-Index: 31 scientists 80 D-Index: 29 scientists 81 D-Index: 18 scientists 82 D-Index: 21 scientists 83 D-Index: 26 scientists 84 D-Index: 15 scientists 85 D-Index: 15 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 12 scientists 89 D-Index: 7 scientists 90 D-Index: 19 scientists 91 D-Index: 20 scientists 92 D-Index: 13 scientists 93 D-Index: 9 scientists 94 D-Index: 13 scientists 95 D-Index: 8 scientists 96 D-Index: 7 scientists 97 D-Index: 6 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100+ D-Index: 97 scientists
30 D-Index 100+

This scientist: 50 D-Index — 66th percentile

66% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 100 D-Index or more.

Overview

Ka-Fai Chung is affiliated with the University of Hong Kong in China. Their research primarily focuses on psychology, neuroscience, and medicine, with particular specialization in experimental and cognitive psychology, clinical psychology, and cognitive neuroscience. Their work also extends to social psychology and psychiatry and mental health.

The scientist has contributed extensively to topics related to sleep and related disorders, covering areas such as sleep and wakefulness research, circadian rhythm and melatonin, and tryptophan and brain disorders. Additional research interests include mental health research and the impact of COVID-19 on mental health, as well as eating disorders and behaviors.

Recent papers authored or coauthored by Ka-Fai Chung include the following:

  • "Effects of Tai Chi or Exercise on Sleep in Older Adults With Insomnia," 2021, JAMA Network Open
  • "Prevalence of sleep disturbances during COVID-19 outbreak in an urban Chinese population: a cross-sectional study," 2020, Sleep Medicine
  • "Lifestyle medicine for depression: A meta-analysis of randomized controlled trials," 2021, Journal of Affective Disorders
  • "Acupuncture for chemotherapy-associated insomnia in breast cancer patients: an assessor-participant blinded, randomized, sham-controlled trial," 2023, Breast Cancer Research
  • "Associations between the Chronotypes and Eating Habits of Hong Kong School-Aged Children," 2020, International Journal of Environmental Research and Public Health

Their frequent coauthors include Wing-Fai Yeung, Fiona Yan-Yee Ho, Branda Yee-Man Yu, Vincent Wing-Hei Wong, and Heidi Ka Ying Lo.

Ka-Fai Chung often publishes research findings in specialized academic journals. Venues with multiple publications include the Journal of Affective Disorders, Sleep Medicine, International Journal of Environmental Research and Public Health, and Journal of Consulting and Clinical Psychology. The scientist has also published work in JAMA Network Open.

Best Publications

  • A community study of sleep-disordered breathing in middle-aged Chinese men in Hong Kong.

    Mary S.M. Ip;Bing Lam;Ian J. Lauder;Kenneth W.T. Tsang

  • Assessing insomnia in adolescents: Comparison of Insomnia Severity Index, Athens Insomnia Scale and Sleep Quality Index

    Ka Fai Chung;Katherine Ka Ki Kan;Wing Fai Yeung

  • Sleep-Wake Patterns and Sleep Disturbance among Hong Kong Chinese Adolescents

    Ka-Fai Chung;Miao-Miao Cheung

  • Acupuncture for insomnia.

    Daniel K.L. Cheuk;Wing Fai Yeung;K. F. Chung;Virginia Wong

  • Sleep hygiene education as a treatment of insomnia: a systematic review and meta-analysis.

    Ka Fai Chung;Chit Tat Lee;Wing Fai Yeung;Man Sum Chan

  • Sleep-wake disturbance in interepisode bipolar disorder and high-risk individuals: a systematic review and meta-analysis.

    Tommy H. Ng;Ka Fai Chung;Fiona Yan Yee Ho;Wing Fai Yeung

  • Self-help cognitive-behavioral therapy for insomnia: A meta-analysis of randomized controlled trials

    Fiona Yan-Yee Ho;Ka-Fai Chung;Wing-Fai Yeung;Tommy H. Ng

  • Cross-cultural and comparative epidemiology of insomnia: the Diagnostic and statistical manual (DSM), International classification of diseases (ICD) and International classification of sleep disorders (ICSD).

    Ka Fai Chung;Wing Fai Yeung;Fiona Yan Yee Ho;Kam Ping Yung

  • Electroacupuncture for primary insomnia: a randomized controlled trial.

    Wing Fai Yeung;Ka Fai Chung;Shi Ping Zhang;Tuan Gee Yap

  • Use of the Epworth Sleepiness Scale in Chinese patients with obstructive sleep apnea and normal hospital employees

    K.F Chung

  • Acupressure, reflexology, and auricular acupressure for insomnia: a systematic review of randomized controlled trials.

    Wing Fai Yeung;Ka Fai Chung;Maggie Man Ki Poon;Fiona Yan Yee Ho

  • Sleep in schizophrenia: A systematic review and meta-analysis of polysomnographic findings in case-control studies.

    Man-Sum Chan;Ka-Fai Chung;Kam-Ping Yung;Wing-Fai Yeung

  • Insomnia subtypes and their relationships to daytime sleepiness in patients with obstructive sleep apnea.

    Ka Fai Chung

  • University students' attitudes towards mental patients and psychiatric treatment.

    K.F. Chung;Eric Y.H. Chen;Catherine S.M. Liu

  • Qigong Exercise Alleviates Fatigue, Anxiety, and Depressive Symptoms, Improves Sleep Quality, and Shortens Sleep Latency in Persons with Chronic Fatigue Syndrome-Like Illness

    Jessie Sm M. Chan;Rainbow Th H. Ho;Ka-Fai Chung;Chong-Wen Wang

  • Chinese herbal medicine for insomnia: A systematic review of randomized controlled trials

    Wing Fai Yeung;Ka Fai Chung;Maggie Man-Ki Poon;Fiona Yan-Yee Ho

  • Experience of stigma among Chinese mental health patients in Hong Kong

    K. F. Chung;M. C. Wong

  • Effects of Tai Chi or Exercise on Sleep in Older Adults With Insomnia: A Randomized Clinical Trial.

    Parco M. Siu;Angus P. Yu;Bjorn T. Tam;Edwin C. Chin

  • Electroacupuncture for residual insomnia associated with major depressive disorder: a randomized controlled trial.

    Wing-Fai Yeung;Ka-Fai Chung;Kwok-Chu Tso;Shi-Ping Zhang

  • Doxepin for insomnia: A systematic review of randomized placebo-controlled trials

    Wing-Fai Yeung;Ka-Fai Chung;Kam-Ping Yung;Tommy Ho-Yee Ng

  • Traditional needle acupuncture treatment for insomnia: a systematic review of randomized controlled trials.

    Wing Fai Yeung;Ka Fai Chung;Yau Kwong Leung;Shi Ping Zhang

Frequent Co-Authors

Yun Kwok Wing
Yun Kwok Wing Chinese University of Hong Kong
Lixing Lao
Lixing Lao Virginia University of Integrative Medicine
Cecilia L. W. Chan
Cecilia L. W. Chan University of Hong Kong
Kwok-Fai So
Kwok-Fai So University of Hong Kong
Linda C. W. Lam
Linda C. W. Lam Chinese University of Hong Kong
Larry Davidson
Larry Davidson Yale University
Jean Woo
Jean Woo Chinese University of Hong Kong
Catherine So-kum Tang
Catherine So-kum Tang Hong Kong Shue Yan University
Robbert Sanderman
Robbert Sanderman University of Groningen
Anton J. L. M. van Balkom
Anton J. L. M. van Balkom University of Amsterdam

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