| Shift work with and without night work as a risk factor for fatigue and changes in sleep length: A cohort study with linkage to records on daily working hours M Härmä, K Karhula, S Puttonen, A Ropponen, A Koskinen, A Ojajärvi, ... Journal of Sleep Research 28 (3), e12658, 2019 | 105 | 2019 |
| Association of changes in work shifts and shift intensity with change in fatigue and disturbed sleep: a within-subject study M Härmä, K Karhula, A Ropponen, S Puttonen, A Koskinen, A Ojajärvi, ... Scandinavian Journal of Work, Environment & Health 44 (4), 394-402, 2018 | 75 | 2018 |
| Validity of self-reported exposure to shift work M Härmä, A Koskinen, A Ropponen, S Puttonen, K Karhula, J Vahtera, ... Occupational and environmental medicine 74 (3), 228-230, 2017 | 66 | 2017 |
| Job strain, sleep and alertness in shift working health care professionals—a field study K Karhula, M Härmä, M Sallinen, C Hublin, J Virkkala, M Kivimäki, ... Industrial health 51 (4), 406-416, 2013 | 61 | 2013 |
| Association of job strain with working hours, shift-dependent perceived workload, sleepiness and recovery K Karhula, M Härmä, M Sallinen, C Hublin, J Virkkala, M Kivimäki, ... Ergonomics 56 (11), 1640-1651, 2013 | 60 | 2013 |
| Objective working hour characteristics and work–life conflict among hospital employees in the Finnish public sector study K Karhula, S Puttonen, A Ropponen, A Koskinen, A Ojajärvi, M Kivimäki, ... Chronobiology international 34 (7), 876-885, 2017 | 58 | 2017 |
| Sleep and alertness in shift work disorder: findings of a field study P Vanttola, M Härmä, K Viitasalo, C Hublin, J Virkkala, M Sallinen, ... International archives of occupational and environmental health 92, 523-533, 2019 | 52 | 2019 |
| Prevalence of shift work disorder among hospital personnel: A cross‐sectional study using objective working hour data P Vanttola, S Puttonen, K Karhula, T Oksanen, M Härmä Journal of sleep research 29 (3), e12906, 2020 | 46 | 2020 |
| Are changes in objective working hour characteristics associated with changes in work-life conflict among hospital employees working shifts? A 7-year follow-up K Karhula, A Koskinen, A Ojajärvi, A Ropponen, S Puttonen, M Kivimäki, ... Occupational and environmental medicine 75 (6), 407-411, 2018 | 44 | 2018 |
| Permanent night workers sleep and psychosocial factors in hospital work. A comparison to day and shift work K Karhula, T Hakola, A Koskinen, A Ojajärvi, M Kivimäki, M Härmä Chronobiology international 35 (6), 785-794, 2018 | 41 | 2018 |
| The effects of using participatory working time scheduling software on sickness absence: A difference-in-differences study J Turunen, K Karhula, A Ropponen, A Koskinen, T Hakola, S Puttonen, ... International Journal of Nursing Studies 112, 103716, 2020 | 37 | 2020 |
| Effects of alertness management training on sleepiness among long-haul truck drivers: A randomized controlled trial M Pylkkönen, A Tolvanen, C Hublin, J Kaartinen, K Karhula, S Puttonen, ... Accident Analysis & Prevention 121, 301-313, 2018 | 37 | 2018 |
| Työaikojen muutosten ja kehittämisinterventioiden vaikutukset työhyvinvointiin, työturvallisuuteen ja työhön osallistumiseen M Härmä, K Karhula, A Ropponen, A Koskinen, J Turunen, A Ojajärvi, ... Työterveyslaitos, 2019 | 35 | 2019 |
| Night shift work and the risk of metabolic syndrome: findings from an 8-year hospital cohort WJ Cheng, CS Liu, KC Hu, YF Cheng, K Karhula, M Härmä PLoS One 16 (12), e0261349, 2021 | 34 | 2021 |
| Sleep and satisfaction in 8-and 12-h forward-rotating shift systems: Industrial employees prefer 12-h shifts K Karhula, M Härmä, A Ropponen, T Hakola, M Sallinen, S Puttonen Chronobiology international 33 (6), 768-775, 2016 | 34 | 2016 |
| A method for evaluating the load of patient transfers K Karhula, T Rönnholm, T Sjögren Occupational Safety and Health Administration. Occupational safety and …, 2009 | 30 | 2009 |
| Working time dimensions and well-being: a cross-national study of Finnish and German health care employees K Karhula, AM Wöhrmann, C Brauner, M Härmä, M Kivimäki, A Michel, ... Chronobiology International 37 (9-10), 1312-1324, 2020 | 29 | 2020 |
| Association of job strain with cortisol and alpha-amylase among shift-working health care professionals in laboratory and field K Karhula, M Härmä, M Sallinen, H Lindholm, A Hirvonen, M Elovainio, ... Biological research for nursing 18 (1), 101-112, 2016 | 27 | 2016 |
| Työstressi ja uni hoitotyössä K Karhula, S Puttonen, M Vuori, M Sallinen, HK Hyvärinen, V Kalakoski, ... Työterveyslaitos, 2011 | 27 | 2011 |
| The effects of using participatory working time scheduling software on working hour characteristics and wellbeing: A quasi-experimental study of irregular shift work K Karhula, J Turunen, T Hakola, A Ojajärvi, S Puttonen, A Ropponen, ... International Journal of Nursing Studies 112, 103696, 2020 | 25 | 2020 |
