Sami Leppämäki

Summary

Affiliation: National Public Health Institute
Country: Finland

Publications

  1. ncbi Randomized trial of the efficacy of bright-light exposure and aerobic exercise on depressive symptoms and serum lipids
    Sami J Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Clin Psychiatry 63:316-21. 2002
  2. ncbi Bright-light exposure combined with physical exercise elevates mood
    S Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FIN 00300, Helsinki, Finland
    J Affect Disord 72:139-44. 2002
  3. ncbi Timed bright-light exposure and complaints related to shift work among women
    Sami Leppämäki
    National Public Health Institute, Department of Mental Health and Alcohol Research, Helsinki, Finland
    Scand J Work Environ Health 29:22-6. 2003
  4. ncbi Effect of controlled-release melatonin on sleep quality, mood, and quality of life in subjects with seasonal or weather-associated changes in mood and behaviour
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FIN 00300 Helsinki, Finland
    Eur Neuropsychopharmacol 13:137-45. 2003
  5. pmc Effect of simulated dawn on quality of sleep--a community-based trial
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    BMC Psychiatry 3:14. 2003
  6. pmc Drop-out and mood improvement: a randomised controlled trial with light exposure and physical exercise [ISRCTN36478292]
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, Unit for Epidemiology and Genetics of Mental Health, National Public Health Institute, Helsinki, Finland
    BMC Psychiatry 4:22. 2004
  7. ncbi Suicidal ideation and attempts in bipolar I and II disorders
    Hanna Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, 00300 Helsinki, Finland
    J Clin Psychiatry 66:1456-62. 2005
  8. doi Hopelessness across phases of bipolar I or II disorder: a prospective study
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Affect Disord 115:11-7. 2009
  9. ncbi Differences in Axis I and II comorbidity between bipolar I and II disorders and major depressive disorder
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Clin Psychiatry 67:584-93. 2006
  10. ncbi The clinical characteristics of DSM-IV bipolar I and II disorders: baseline findings from the Jorvi Bipolar Study (JoBS)
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 6:395-405. 2004

Collaborators

Detail Information

Publications34

  1. ncbi Randomized trial of the efficacy of bright-light exposure and aerobic exercise on depressive symptoms and serum lipids
    Sami J Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Clin Psychiatry 63:316-21. 2002
    ..Our objective was to compare the effect of aerobic exercise with or without bright-light exposure on health-related quality of life, mood, and serum lipids in a sample of relatively healthy adult subjects...
  2. ncbi Bright-light exposure combined with physical exercise elevates mood
    S Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FIN 00300, Helsinki, Finland
    J Affect Disord 72:139-44. 2002
    ..Our objective was to compare the effect of exercise alone or combined with morning bright light on mood and the health-related quality of life in healthy subjects...
  3. ncbi Timed bright-light exposure and complaints related to shift work among women
    Sami Leppämäki
    National Public Health Institute, Department of Mental Health and Alcohol Research, Helsinki, Finland
    Scand J Work Environ Health 29:22-6. 2003
    ..A secondary objective was to investigate whether this response differed by season (summer or winter), seasonality, or age...
  4. ncbi Effect of controlled-release melatonin on sleep quality, mood, and quality of life in subjects with seasonal or weather-associated changes in mood and behaviour
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FIN 00300 Helsinki, Finland
    Eur Neuropsychopharmacol 13:137-45. 2003
    ..03) and vitality (P=0.02) in the subjects with s-SAD, but attenuated the improvement of atypical symptoms and physical parameters of quality of life compared to placebo in the subjects with WAS, positive type...
  5. pmc Effect of simulated dawn on quality of sleep--a community-based trial
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    BMC Psychiatry 3:14. 2003
    ..Disturbances in sleep patterns are common and may compromise wellbeing even in the short term. Our hypothesis was that simulated dawn could improve the subjective quality of sleep during winter...
  6. pmc Drop-out and mood improvement: a randomised controlled trial with light exposure and physical exercise [ISRCTN36478292]
    Sami Leppämäki
    Department of Mental Health and Alcohol Research, Unit for Epidemiology and Genetics of Mental Health, National Public Health Institute, Helsinki, Finland
    BMC Psychiatry 4:22. 2004
    ..We explored background variables possibly explaining the individual variation in treatment response or failure in a randomised trial...
  7. ncbi Suicidal ideation and attempts in bipolar I and II disorders
    Hanna Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, 00300 Helsinki, Finland
    J Clin Psychiatry 66:1456-62. 2005
    ..Few studies have investigated the prevalence of and risk factors for suicidal ideation and attempts among representative samples of psychiatric patients with bipolar I and II disorders...
  8. doi Hopelessness across phases of bipolar I or II disorder: a prospective study
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Affect Disord 115:11-7. 2009
    ..We investigated the degree to which hopelessness is trait- or state-related during the course of BD...
  9. ncbi Differences in Axis I and II comorbidity between bipolar I and II disorders and major depressive disorder
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Clin Psychiatry 67:584-93. 2006
    ..To obtain a comprehensive view of differences in current comorbidity between bipolar I and II disorders (BD) and (unipolar) major depressive disorder (MDD), and Axis I and II comorbidity in BD in secondary-care psychiatric settings...
  10. ncbi The clinical characteristics of DSM-IV bipolar I and II disorders: baseline findings from the Jorvi Bipolar Study (JoBS)
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 6:395-405. 2004
    ..To obtain a comprehensive view of the clinical epidemiology of bipolar I and II disorder in secondary-level psychiatric settings...
  11. ncbi Prospective study of risk factors for attempted suicide among patients with bipolar disorder
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 8:576-85. 2006
    ..We conducted a prospective study to investigate risk for suicide attempts among a secondary-level sample of psychiatric in- and outpatients with bipolar disorder (BD)...
  12. doi How suicidal bipolar patients are depends on how suicidal ideation is defined
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Affect Disord 118:48-54. 2009
    ..Suicidal ideation indicates risk for suicidal acts. How different definitions and measures for suicidal ideation influence its prevalence, correlates and predictive validity among bipolar disorder (BD) patients is unknown...
  13. doi Differences in neuroticism and extraversion between patients with bipolar I or II and general population subjects or major depressive disorder patients
    Pekka Jylhä
    Department of Mental Health and Substance Use, National Institute of Health and Welfare, Helsinki, Finland
    J Affect Disord 125:42-52. 2010
    ..Whether levels of neuroticism or extraversion differ between patients with bipolar disorder (BD), major depressive disorder (MDD) and subjects from the general population, or between BD I and BD II patients, remains unclear...
  14. doi Concomitants of family histories of mood disorders and alcoholism in a clinical cohort of patients with bipolar I and II disorder
    Outi Mantere
    Department of Mental Health and Substance Abuse Services, National Institute of Health and Welfare, Helsinki, Finland
    J Nerv Ment Dis 200:388-94. 2012
    ..The strongest associations are between FH of mood disorders and presence of comorbid anxiety disorders...
  15. doi Differences in incidence of suicide attempts during phases of bipolar I and II disorders
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 10:588-96. 2008
    ..Differences in the incidence of suicide attempts during various phases of bipolar disorder (BD), or the relative importance of static versus time-varying risk factors for overall risk for suicide attempts, are unknown...
  16. ncbi Early age at onset of bipolar disorder is associated with more severe clinical features but delayed treatment seeking
    Kirsi Suominen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 9:698-705. 2007
    ..Our aim was to obtain a comprehensive view of differences between bipolar disorder (BD) patients with onset at early versus adult age in a representative study cohort...
  17. doi A prospective latent analyses study of psychiatric comorbidity of DSM-IV bipolar I and II disorders
    Outi Mantere
    Department of Mental Health and Substance Use, National Institute of Health and Welfare, Helsinki, Finland
    Bipolar Disord 12:271-84. 2010
    ..To test two hypotheses of psychiatric comorbidity in bipolar disorder (BD): (i) comorbid disorders are independent of BD course, or (ii) comorbid disorders associate with mood...
  18. doi Project DyAdd: visual attention in adult dyslexia and ADHD
    Marja Laasonen
    Institute of Behavioural Sciences, Division of Cognitive and Neuropsychology, University of Helsinki, Helsinki, Finland
    Brain Cogn 80:311-27. 2012
    ..Thus, difficulties in tasks of visual attention were related to dyslexia and variation of visual attention had a role in the reading ability of the general population...
  19. doi Project DyAdd: classical eyeblink conditioning in adults with dyslexia and ADHD
    Marja Laasonen
    Division of Cognitive and Neuropsychology, Institute of Behavioural Sciences, University of Helsinki, Siltavuorenpenger 1, P O Box 9, 00014, Helsinki, Finland
    Exp Brain Res 223:19-32. 2012
    ..Further, larger responses in the ADHD group are suggested to result from their lowered responding threshold...
  20. doi Clinical predictors of unrecognized bipolar I and II disorders
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki
    Bipolar Disord 10:238-44. 2008
    ..We investigated the demographic and clinical predictors of the absence of a clinical diagnosis of BD I and II among psychiatric patients...
  21. doi Maintenance treatment received by patients with bipolar I and II disorders--a naturalistic prospective study
    Petri Arvilommi
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Affect Disord 121:116-26. 2010
    ..We investigated the adequacy of maintenance phase pharmacotherapy received by psychiatric in- and outpatients with bipolar I or II disorder, including patients both with and without a clinical diagnosis of bipolar disorder (BD)...
  22. ncbi Transition to daylight saving time reduces sleep duration plus sleep efficiency of the deprived sleep
    Tuuli A Lahti
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FI 00300 Helsinki, Finland
    Neurosci Lett 406:174-7. 2006
    ..14min (P<0.01) and sleep efficiency was reduced by 10% (P<0.01) on average. Transition to daylight saving time appears to compromise the process of sleep by decreasing both sleep duration and sleep efficiency...
  23. doi Differences in outcome of DSM-IV bipolar I and II disorders
    Outi Mantere
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    Bipolar Disord 10:413-25. 2008
    ..To investigate whether the course of bipolar disorder (BD) type II is more depressive than that of BD I, and, if so, to explore the underlying factors that cause this difference...
  24. ncbi Suicidal behaviour during different phases of bipolar disorder
    Hanna M Valtonen
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Affect Disord 97:101-7. 2007
    ..There are no previous studies comparing the prevalence and risk factors for suicidal behaviour during different phases of bipolar disorder...
  25. doi Predictors of adherence to psychopharmacological and psychosocial treatment in bipolar I or II disorders - an 18-month prospective study
    Petri Arvilommi
    Department of Mental Health and Substance Use, National Institute of Health and Welfare, Helsinki, Finland Psychiatric and substance abuse services, Helsinki City Department of Social Services and Health Care, Helsinki, Finland
    J Affect Disord 155:110-7. 2014
    ..However, whether adherence is mostly determined by patient characteristics or attitudes, type of treatment or treatment side-effects remains poorly known...
  26. doi Project DyAdd: phonological processing, reading, spelling, and arithmetic in adults with dyslexia or ADHD
    Marja Laasonen
    University of Helsinki, Finland, Helsinki University Central Hospital, Finland
    J Learn Disabil 43:3-14. 2010
    ..Furthermore, all the observed differences became nonsignificant when intelligence quotient was controlled for. This suggests that adult ADHD is not related to significant impairments in phonological processing or achievement...
  27. doi Project DyAdd: implicit learning in adult dyslexia and ADHD
    Marja Laasonen
    Division of Cognitive and Neuropsychology, Institute of Behavioural Sciences, University of Helsinki, P O Box 9, Siltavuorenpenger 1, FIN 00014, Helsinki, Finland
    Ann Dyslexia 64:1-33. 2014
    ..However, learning in AGL is not related to the defining neuropsychological features of dyslexia or ADHD. Instead, the resulting explicit knowledge relates to characteristics of dyslexia...
  28. pmc Transitions into and out of daylight saving time compromise sleep and the rest-activity cycles
    Tuuli A Lahti
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    BMC Physiol 8:3. 2008
    ..Rest-activity cycles were measured using wrist-worn accelerometers. The participants filled in the Morningness-Eveningness and Seasonal Pattern Assessment Questionnaires before starting the study and kept a sleep diary during the study...
  29. pmc Transition into daylight saving time influences the fragmentation of the rest-activity cycle
    Tuuli A Lahti
    Department of Mental Health and Alcohol Research, National Public Health Institute, Mannerheimintie 166, FI 00300 Helsinki, Finland
    J Circadian Rhythms 4:1. 2006
    ..01). CONCLUSION : Transition into daylight saving time may have a disruptive effect on the rest-activity cycle in those healthy adults who are short-sleepers or more of the evening type...
  30. ncbi Adequacy of treatment received by diagnosed and undiagnosed patients with bipolar I and II disorders
    Petri Arvilommi
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    J Clin Psychiatry 68:102-10. 2007
    ..To investigate the adequacy of pharmacotherapy received by psychiatric inpatients and outpatients with a research diagnosis of bipolar I or II disorder, including patients both with and without a clinical diagnosis of bipolar disorder...
  31. doi Retrospective assessment of ADHD symptoms in childhood: discriminatory validity of Finnish translation of the Wender Utah Rating Scale
    Sasa Kivisaari
    Institute of Behavioural Sciences, Division of Cognitive and Neuropsychology, University of Helsinki, Finland
    J Atten Disord 16:449-59. 2012
    ..To examine the discriminatory validity of the Wender Utah Rating Scale (WURS) and its five suggested subscales (Conduct Problems, Impulsivity Problems, Mood Difficulties, Inattention/Anxiety, Academic Concerns) in a Finnish sample...
  32. pmc The mood disorder questionnaire improves recognition of bipolar disorder in psychiatric care
    Erkki Isometsä
    Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland
    BMC Psychiatry 3:8. 2003
    ..We investigated our translation of The Mood Disorder Questionnaire (MDQ) as a screening instrument for bipolar disorder in a psychiatric setting in Finland...
  33. ncbi Field trial of timed bright light exposure for jet lag among airline cabin crew
    Tuuli Lahti
    National Public Health Institute Department of Mental Health and Alcohol Research, FI 00300, Helsinki, Finland
    Int J Circumpolar Health 66:365-9. 2007
    ..Following rapid changes in circadian rhythm may lead to several symptoms known as jet lag. Our aim was to alleviate jet-lag symptoms by timed exposure to bright light (natural sunlight if present, otherwise artificial bright light)...
  34. ncbi Project DyAdd: Fatty acids in adult dyslexia, ADHD, and their comorbid combination
    Marja Laasonen
    Department of Psychology, University of Helsinki, P O Box 9 Siltavuorenpenger 20, FIN 00014, Helsinki, Finland
    Prostaglandins Leukot Essent Fatty Acids 81:89-96. 2009
    ..Controlling for poorly diagnosed reading difficulties, education, dietary fat quality, or use of FA supplements did not generally remove the originally observed associations...