| Effectiveness of hip or knee replacement surgery in terms of quality-adjusted life years and costs P Räsänen, P Paavolainen, H Sintonen, AM Koivisto, M Blom, ... Acta orthopaedica 78 (1), 108-115, 2007 | 469 | 2007 |
| Use of quality-adjusted life years for the estimation of effectiveness of health care: a systematic literature review P Räsänen, E Roine, H Sintonen, V Semberg-Konttinen, OP Ryynänen, ... International journal of technology assessment in health care 22 (2), 235-241, 2006 | 346 | 2006 |
| Association between low activity serotonin transporter promoter genotype and early onset alcoholism with habitual impulsive violent behavior T Hallikainen, T Saito, HM Lachman, J Volavka, T Pohjalainen, ... Molecular psychiatry 4 (4), 385-388, 1999 | 327 | 1999 |
| Altered striatal dopamine re-uptake site densities in habitually violent and non-violent alcoholics J Tiihonen, J Kuikka, K Bergström, P Hakola, J Karhu, OP Ryynänen, ... Nature medicine 1 (7), 654-657, 1995 | 285 | 1995 |
| Association between the functional variant of the catechol-O-methyltransferase (COMT) gene and type 1 alcoholism J Tiihonen, T Hallikainen, H Lachman, T Saito, J Volavka, J Kauhanen, ... Molecular psychiatry 4 (3), 286-289, 1999 | 268 | 1999 |
| Lamotrigine in treatment-resistant schizophrenia: a randomized placebo-controlled crossover trial J Tiihonen, T Hallikainen, OP Ryynänen, E Repo-Tiihonen, I Kotilainen, ... Biological psychiatry 54 (11), 1241-1248, 2003 | 241 | 2003 |
| Cluster-randomized controlled trial of reducing seclusion and restraint in secured care of men with schizophrenia A Putkonen, S Kuivalainen, O Louheranta, E Repo-Tiihonen, ... Psychiatric services 64 (9), 850-855, 2013 | 187 | 2013 |
| Attitudes towards euthanasia among physicians, nurses and the general public in Finland OP Ryynänen, M Myllykangas, M Viren, H Heino Public health 116 (6), 322-331, 2002 | 171 | 2002 |
| Terveydenhuollon etiikka: Arvot monimutkaisuuden maailmassa OP Ryynänen, M Myllykangas WSOY, 2000 | 154 | 2000 |
| Is advanced life support better than basic life support in prehospital care? A systematic review OP Ryynänen, T Iirola, J Reitala, H Pälve, A Malmivaara Scandinavian journal of trauma, resuscitation and emergency medicine 18, 1-14, 2010 | 148 | 2010 |
| Topiramate add-on in treatment-resistant schizophrenia: a randomized, double-blind, placebo-controlled, crossover trial J Tiihonen, P Halonen, K Wahlbeck, E Repo-Tiihonen, S Hyvarinen, ... Journal of Clinical Psychiatry 66 (8), 1012-1015, 2005 | 134 | 2005 |
| Medications and chronic diseases as risk factors for falling injuries in the elderly OP Ryynänen, SL Kivelä, R Honkanen, P Laippala, V Saano Scandinavian journal of social medicine 21 (4), 264-271, 1993 | 112 | 1993 |
| Citalopram in the treatment of alcoholism: a double-blind placebo-controlled study J Tiihonen, OP Ryynänen, J Kauhanen, HPA Hakola, M Salaspuro Pharmacopsychiatry 29 (01), 27-30, 1996 | 110 | 1996 |
| Analysis of monoamine oxidase A (MAOA) promoter polymorphism in Finnish male alcoholics T Saito, HM Lachman, L Diaz, T Hallikainen, J Kauhanen, JT Salonen, ... Psychiatry research 109 (2), 113-119, 2002 | 106 | 2002 |
| Striatal presynaptic dopamine function in type 1 alcoholics measured with positron emission tomography J Tiihonen, H Vilkman, P Räsänen, OP Ryynänen, H Hakko, J Bergman, ... Molecular psychiatry 3 (2), 156-161, 1998 | 106 | 1998 |
| A randomized controlled trial of rehabilitation after hospitalization in frail older women: effects on strength, balance and mobility L Timonen, T Rantanen, OP Ryynänen, S Taimela, TE Timonen, ... Scandinavian journal of medicine & science in sports 12 (3), 186-192, 2002 | 98 | 2002 |
| Attitudes to health care prioritisation methods and criteria among nurses, doctors, politicians and the general public OP Ryynänen, M Myllykangas, J Kinnunen, J Takala Social science & medicine 49 (11), 1529-1539, 1999 | 91 | 1999 |
| Medikalisaatio–aikamme sairaus R Tuomainen, M Myllykangas, J Elo, OP Ryynänen Tampere: Vastapaino, 1999 | 91 | 1999 |
| Incidence of falling injuries leading to medical treatment in the elderly OP Ryynänen, SL Kivelä, R Honkanen, P Laippala, P Soini Public Health 105 (5), 373-386, 1991 | 90 | 1991 |
| Lack of association between the functional variant of the catechol‐o‐methyltransferase (COMT) gene and early‐onset alcoholism associated with severe antisocial behavior T Hallikainen, H Lachman, T Saito, J Volavka, J Kauhanen, JT Salonen, ... American journal of medical genetics 96 (3), 348-352, 2000 | 83 | 2000 |
