Aliki Karkala

Dr. Aliki Karkala

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
20 January 2023 in Life
Verified
Journal Article
Open access
PDF file
Athanasia PatakaAthanasia Pataka
Athanasia Pataka
Serafeim - Chrysovalantis KotoulasSerafeim - Chrysovalantis Kotoulas
Serafeim - Chrysovalantis Kotoulas
PGPanagiotis Rafail Gavrilis
Panagiotis Rafail Gavrilis
AKAliki Karkala
Aliki Karkala
ATAsterios Tzinas
Asterios Tzinas
ASAimiliza Stefanidou
Aimiliza Stefanidou
Obstructive sleep apnea (OSA) is considered a chronic disease that requires long-term multidisciplinary management for effective treatment. Continuous Positive Airway Pressure (CPAP) is still considered the gold standard of therapy. However, CPAP effectiveness is limited due to poor patients’ adherence, as almost 50% of patients discontinue treatment after a year. Several interventions have been used in order to increase CPAP adherence. Mindfulness-based therapies have been applied in other sleep disorders such as insomnia but little evidence exists for their application on OSA patients. This review aims to focus on the current data on whether mindfulness interventions may be used in order to increase CPAP adherence and improve the sleep quality of OSA patients. Even though controlled trials of mindfulness and CPAP compliance remain to be performed, this review supports the hypothesis that mindfulness may be used as an adjunct method in order to increase CPAP adherence in OSA patients.

8 December 2023 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
Athanasia PatakaAthanasia Pataka
Athanasia Pataka
Serafeim - Chrysovalantis KotoulasSerafeim - Chrysovalantis Kotoulas
Serafeim - Chrysovalantis Kotoulas
AKAliki Karkala
Aliki Karkala
ATAsterios Tzinas
Asterios Tzinas
GKGeorge Kalamaras
George Kalamaras
ESEmiliza Stefanidou
Emiliza Stefanidou
Tobacco smoking has been a recognized risk factor for cardiovascular diseases (CVD). Smoking is a chronic relapsing disease and pharmacotherapy is a main component of smoking cessation. Obstructive sleep apnea (OSA) and smoking both increase the risk of CVD and are associated with significant morbidity and mortality. There are few existing data examining how pharmacological treatment, such as nicotine replacement therapy (NRT), bupropion, and varenicline, affect smokers suffering with OSA and especially their cardiovascular effects. The aim of this review was to evaluate the effects of smoking cessation pharmacotherapy on OSA with a special emphasis on the cardiovascular system. Results: Only small studies have assessed the effect of NRTs on OSA. Nicotine gum administration showed an improvement in respiratory events but with no permanent results. No specific studies were found on the effect of bupropion on OSA, and a limited number evaluated varenicline’s effects on sleep and specifically OSA. Varenicline administration in smokers suffering from OSA reduced the obstructive respiratory events, especially during REM. Studies on second-line medication (nortriptyline, clonidine, cytisine) are even more limited. There are still no studies evaluating the cardiovascular effects of smoking cessation medications on OSA patients. Conclusions: Sleep disturbances are common withdrawal effects during smoking cessation but could be also attributed to pharmacotherapy. Smokers should receive personalized treatment during their quitting attempts according to their individual needs and problems, including OSA. Future studies are needed in order to evaluate the efficacy and safety of smoking cessation medications in OSA patients.

28 July 2022 in Journal of Occupational and Environmental Medicine
Verified
Journal Article
Closed access
AKAliki Karkala
Aliki Karkala
SMStavros Moschonas
Stavros Moschonas
GSGeorgios Meng Sykas
Georgios Meng Sykas
MKMaria Msc Karagianni
Maria Msc Karagianni
GSGilou Sotiria
Gilou Sotiria
CKCHRYSOULA KOURTIDOU-PAPADELI
CHRYSOULA KOURTIDOU-PAPADELI
Objective: The aim of this study was to assess the mental health and sleep quality of aviation workers in Greece during the pandemic. Methods: A cross-sectional study of aviation workers in Greece was conducted. Results: Sleep disturbances were observed in 25.4% of our 548 participants, whereas 8.2% and 5.8% reported at least mild depressive and anxiety symptoms, respectively. The impact of the pandemic on their mental health was their primary concern, which increased for many active pilots according to their workload. Those infected mainly faced daily tiredness and fatigue. Smoking habits and high body mass index were a predisposition for more physical symptoms. Cabin crew and women generally yielded worse scores than the other groups. Conclusion: Fear of infection could explain mental health issues, whereas physical symptoms of those infected could be attributed to long-COVID (coronavirus disease) syndrome. Flight attendants' lower ratings may be due to more occupational exposure.

20 August 2024 in Sleep and Breathing
Verified
Journal Article
Closed access
PDF file
AKAliki Karkala
Aliki Karkala
ABAntonios Baxevanidis
Antonios Baxevanidis
ACAnastasia Chasiotou
Anastasia Chasiotou
DSDimitra Siopi
Dimitra Siopi
DMDimitra Mameletzi
Dimitra Mameletzi
ABAfroditi K. Boutou
Afroditi K. Boutou

25 March 2026 in Diagnostics
Verified
Journal Article
Open access
PDF file
ATAsterios Tzinas
Asterios Tzinas
AKAliki Karkala
Aliki Karkala
Serafeim - Chrysovalantis KotoulasSerafeim - Chrysovalantis Kotoulas
Serafeim - Chrysovalantis Kotoulas
GKGeorge Kalamaras
George Kalamaras
EMEleni K. Mouloudi
Eleni K. Mouloudi
Athanasia PatakaAthanasia Pataka
Athanasia Pataka
Background: Obstructive sleep apnea (OSA) is a highly prevalent and heterogeneous sleep disorder. This study aimed to investigate age- and sex-specific phenotypes of OSA in a large clinical cohort, with special emphasis on the effects of aging and menopause on disease severity, hypoxemic component, symptom expression, comorbidities, and screening tool performance. Methods: A retrospective cross-sectional analysis was conducted on 3736 patients with confirmed OSA referred to a tertiary sleep clinic in Greece between 2013 and 2023. Participants were stratified by age and sex. Women were further classified as pre- and post-menopausal using age as a proxy. Clinical characteristics, comorbidities, questionnaire data and polysomnographic indices were analyzed using parametric and non-parametric statistical methods. Results: OSA severity peaked in middle age and remained high in older adults, while nocturnal hypoxemia and cardiometabolic comorbidities worsened with age. Women presented at an older age and with higher body mass index but lower Apnea Hypopnea Index (AHI) compared to men, yet experienced significantly longer hypoxemia and more severe insomnia. Women over 45 years exhibited a markedly more severe and hypoxic phenotype and substantially higher rates of comorbidities. Screening tool performance varied across subgroups: STOP-BANG was the most consistent, while symptom-based tools performed poorly in young women and elderly patients. Conclusions: OSA is a dynamic dependent disorder with distinct phenotypes across the lifespan. Current screening strategies fail to adequately capture these variations, particularly in women and older adults. A personalized, sex- and age-specific approach to OSA diagnosis and management is essential to reduce underdiagnosis and improve outcomes.

4 June 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
AKAliki Karkala
Aliki Karkala
Serafeim - Chrysovalantis KotoulasSerafeim - Chrysovalantis Kotoulas
Serafeim - Chrysovalantis Kotoulas
ATAsterios Tzinas
Asterios Tzinas
EMEleni Vasilios Massa
Eleni Vasilios Massa
EMEleni K. Mouloudi
Eleni K. Mouloudi
Athanasia PatakaAthanasia Pataka
Athanasia Pataka
Obstructive sleep apnea (OSA), a prevalent disorder characterized by recurrent upper airway collapse, is increasingly recognized as a systemic inflammatory condition influenced by microbial dysregulation. Emerging evidence underscores the lung microbiome as a mediator in OSA pathophysiology, where dysbiotic shifts driven by intermittent hypoxia, oxidative stress and mechanical airway trauma amplify inflammatory cascades and perpetuate respiratory instability. This review synthesizes current knowledge on the bidirectional interplay between OSA and lung microbial communities. It aims to highlight how hypoxia-induced alterations in microbial ecology disrupt immune homeostasis, while inflammation-driven mucosal injury fosters pathogenic colonization. Clinical correlations between specific taxa like Streptococcus and Prevotella, and disease severity, suggest microbial signatures as novel biomarkers for OSA progression and treatment response. Furthermore, oxidative stress markers and pro-inflammatory cytokines emerge as potential diagnostic tools that bridge microbial dysbiosis with sleep-related outcomes. However, challenges persist in sampling standardization of the low-biomass lower airways, as well as in causative mechanisms linking microbial dysbiosis to OSA pathophysiology. By integrating microbial ecology with precision sleep medicine, this paradigm shift promises to transform OSA management from mechanical stabilization to holistic ecosystem restoration.