Sami Nikkonen
Senior Researcher
Department of Technical Physics, Faculty of Science, Forestry and Technology
Publications
45/45 items-
Five-year longitudinal changes in oxygen saturation parameters in Obstructive Sleep Apnoea: Impact of age, body mass index, and comorbidities
Howarth, Timothy P; Karhu, Tuomas; Leppänen, Timo; Saad, Helmi Ben; Bahammam, Ahmed; Nikkonen, Sami, 2026, Sleep medicine, 143, 108866. A1 Journal article (refereed), original research -
A novel mobile application to examine impaired vigilance through digital means
Pahari, Purbanka; Schmitz, Lisa; Richert, Elena; Jóhannsdóttir, Kamilla Rún; Kristbergsdóttir, Hlín; Korkalainen, Henri; Töyräs, Juha; Leppänen, Timo; Nikkonen, Sami; Arnardottir, Erna Sif; Islind, Anna Sigridur, 2025, Scientific reports, 15, 1, 39115. A1 Journal article (refereed), original research -
Optimal Electroencephalogram and Electrooculogram Signal Combination for Deep Learning-based Sleep Staging
Tashakori, Masoumeh; Rusanen, Matias; Karhu, Tuomas; Huttunen, Riku; Leppanen, Timo; Nikkonen, Sami, 2025, IEEE journal of biomedical and health informatics, 29, 7, 4741-4747. A1 Journal article (refereed), original research -
A comparative analysis of unsupervised machine‐learning methods in PSG‐related phenotyping
Ghorvei, Mohammadreza; Karhu, Tuomas; Hietakoste, Salla; Ferreira‐Santos, Daniela; Hrubos‐Strøm, Harald; Islind, Anna Sigridur; Biedebach, Luka; Nikkonen, Sami; Leppänen, Timo; Rusanen, Matias, 2024, Journal of sleep research, 34, 3, e14349. A1 Journal article (refereed), original research -
Excessive daytime sleepiness is associated with relative delta frequency power among patients with mild OSA
Howarth, Timothy; Tashakori, Masoumeh; Karhu, Tuomas; Rusanen, Matias; Pitkänen, Henna; Oksenberg, Arie; Nikkonen, Sami, 2024, Frontiers in neurology, 15, 1367860. A1 Journal article (refereed), original research -
Interhemispheric differences of electroencephalography signal characteristics in different sleep stages
Tashakori, Masoumeh; Rusanen, Matias; Karhu, Tuomas; Grote, Ludger; Nath, Rajdeep Kumar; Leppänen, Timo; Nikkonen, Sami, 2024, Sleep medicine, 117, 201-208. A1 Journal article (refereed), original research -
Prolonged lung-to-finger circulation time indicates an increased risk of intermittent hypoxaemia in sleep apnoea patients
Pahari, Purbanka; Korkalainen, Henri; Arnardóttir, Erna Sif; Islind, Anna Sigridur; August, Elias; Oksenberg, Arie; Töyräs, Juha; Leppänen, Timo; Nikkonen, Sami, 2024, ERJ open research, 10, 4, 01051-2023. A1 Journal article (refereed), original research -
Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index
Pitkänen, Minna; Nath, Rajdeep Kumar; Korkalainen, Henri; Nikkonen, Sami; Mahamid, Alaa; Oksenberg, Arie; Duce, Brett; Töyräs, Juha; Kainulainen, Samu; Leppänen, Timo, 2024, Sleep advances, 5, 1, zpad054. A1 Journal article (refereed), original research -
Retrospective validation of automatic sleep analysis with grey areas model for human‐in‐the‐loop scoring approach
Rusanen, Matias; Jouan, Gabriel; Huttunen, Riku; Nikkonen, Sami; Sigurðardóttir, Sigríður; Töyräs, Juha; Duce, Brett; Myllymaa, Sami; Arnardottir, Erna Sif; Leppänen, Timo; Islind, Anna Sigridur; Kainulainen, Samu; Korkalainen, Henri, 2024, Journal of sleep research, 34, 3, e14362. A1 Journal article (refereed), original research -
Temporal and sleep stage‐dependent agreement in manual scoring of respiratory events
Pitkänen, Minna; Pitkänen, Henna; Nath, Rajdeep Kumar; Nikkonen, Sami; Kainulainen, Samu; Korkalainen, Henri; Ólafsdóttir, Kristín Anna; Arnardottir, Erna Sif; Sigurdardottir, Sigridur; Penzel, Thomas; Fanfulla, Francesco; Anttalainen, Ulla; Saaresranta, Tarja; Grote, Ludger; Hedner, Jan; Staats, Richard; Töyräs, Juha; Leppänen, Timo, 2024, Journal of sleep research, 34, 3, e14391. A1 Journal article (refereed), original research