Cross-sectional associations of subjective sleep quality, chronotype and social jetlag with perceived stress in a sample of Irish adults

Understanding the within-person association between daily screen use and sleep can help clarify whether this association reflects potentially causal effects or confounding factors. To synthesize evidence on the within-person association between daily screen use and sleep among youth and to examine whether this association varies by screen type, sleep assessment method, or timing of screen use. Ovid MEDLINE, PsycINFO, SPORTDiscus, and Scopus were searched from inception to August 22, 2025, with forward and backward snowball searching. Data were analyzed in October 2025. Studies reporting on children, adolescents, and young adults aged 3 to 25 years that assessed sleep, measured screen time, and examined daily within-person associations between screen time and sleep were analyzed. Random-effects meta-analysis with cluster-robust variance estimation estimated pooled within-person correlations. Subgroup analyses examined moderating effects of screen type, assessment method, and timing. The primary outcome was within-person correlations between screen time and sleep outcomes, including total sleep time, sleep onset, sleep onset latency, sleep efficiency, wake after sleep onset, and subjective sleep quality. A total of 25 studies reporting on 4562 participants were included. A small significant positive within-person correlation was found between screen time and sleep onset (r = 0.079; 95% CI, 0.010-0.149; P = .03), indicating later bedtimes on days with increased screen use. No significant associations were observed for total sleep time, sleep onset latency, sleep efficiency, wake after sleep onset, or subjective sleep quality. Moderator analyses revealed that the association between screen time and subjective sleep quality significantly differed by timing, with screen time after bedtime showing stronger negative correlation (r = -0.092) vs daily (r = -0.026) or evening (r = -0.005) assessments (P = .007). No other significant moderator effects were observed. Per the results of this systematic review and meta-analysis, daily screen time has a small but significant within-person correlation with later sleep onset; however, short-term daily fluctuations in screen time appear to have minimal impact on sleep duration, efficiency, or quality. Screen time may delay bedtime but is not inherently detrimental to other aspects of sleep health in youth, contrasting with between-person studies showing stronger adverse associations.

The impact of mind-body and aerobic exercises on subjective and objective sleep quality in middle-aged and older adults: A systematic review and meta-analysis of randomized controlled trials.

Subjective sleep quality predict clinical pain severity more strongly than polysomnographic parameters: Machine learning findings from a cross-sectional study.

Daytime dysfunction and SUDEP risk: Exploring the role of sleep and heart rate variability in epilepsy.

Association of sleep disorder with bulbar weakness and short-term outcomes in myasthenia gravis.

Multifactor optimization is a critical consideration needed to enhance resource-use efficiency and improve profitability of indoor crop production. This study investigated potential interactive effects of far-red (FR; 700–750 nm) radiation substitution for red (R; 600–700 nm) light and varying carbon dioxide (CO 2 ) concentrations on growth, morphology, and leaf gas exchange of ‘Rouxai’ young red oakleaf lettuce. Experiments were conducted under a moderate total photon flux density (TPFD) of 400 µmol·m −2 ·s −1 , including 60 µmol·m −2 ·s −1 of blue light (400-500 nm), and an 18-h photoperiod across three developmental stages of young lettuce: small baby (14-day cropping cycle), standard baby (18-day cropping cycle), and teen (22-day cropping cycle) stages. Building on prior work conducted under a lower TPFD (200 µmol·m −2 ·s −1 ), this study aimed to determine how a higher TPFD would influence crop response to FR and CO 2 enrichment during early crop stages. Plants were grown under four FR substitution levels for R (0, 20, 40, or 60 µmol·m −2 ·s −1 ) combined with three CO 2 concentrations (400, 800, or 1200 µmol·mol −1 ). The FR substitution significantly increased shoot biomass accumulation across all developmental stages. Significant interaction occurred between the two environmental variables. Thus, effects of FR depended on the CO 2 concentration. Lack of leaf photosynthetic stimulation in response to FR substitution for R indicated that morphological changes triggered by FR indirectly increased biomass accumulation at higher FR substitution levels. The moderate TPFD used mitigated the tendency of FR to decrease foliar pigmentation, and subjective product quality remained acceptable at all FR levels tested. These findings affirm that partial substitution of R with FR in sole-source lighting increases yield during early stages of lettuce crop production. Strategic FR use in combination with CO 2 management and stage-specific lighting offers a promising approach to improve productivity and profitability of indoor crop production when TPFD is adequately high.

To investigate the knowledge and expectations of abdominopelvic MR elastography (MRE) among radiologists from multiple institutions, and to rate the image quality of MRE maps. Radiologists from Beijing and Tianjin were invited to participate in an online survey. Full MRE maps of the uterus, prostate, pancreas, liver, and kidney from 93 research papers published between 2017 and 2024 were displayed for image quality rating, blinded to the MRE systems. Before and after the image-review session, the participants' knowledge and expectations about abdominopelvic MRE were investigated. Eighty-one radiologists finalized the survey, all but one from tertiary hospitals. Their knowledge of MRE mainly came from the literature and conferences, and only 29.6% had hands-on experience. Additional setup and scanning time, as well as patient safety and comfort, were the major concerns that may hinder MRE application. Parametric maps from two MRE systems were reviewed, and the pressurized air (PA) system exhibited consistently higher subjective image quality for all five abdominopelvic organs compared to the acoustic driver (AD) system (all p < 0.05). The participants' knowledge about MRE improved after the image-review session, whereas their expectation declined regarding its utility in abdominopelvic tumor detection, characterization, staging, and treatment monitoring. Technical unfamiliarity with MRE was high, with ignorance rates ranging from 42.0% to 64.2%. There was limited knowledge and availability of MRE even in tertiary hospitals in China's capital region. Currently available MRE systems offer varying levels of anatomical details, and the PA system might be more advantageous for applications in abdominopelvic oncology. Question The radiologists' current knowledge and expectations of abdominopelvic MRE remained poorly investigated, and the impact of MRE image quality was unknown. Findings There was limited knowledge and availability of MRE in China's capital region, and MRE systems didn't consistently achieve sufficient image quality for abdominopelvic oncology. Clinical relevance Although MRE holds promise for abdominopelvic oncology, its availability and familiarity among radiologists remain low, and the image quality of MRE maps is sometimes insufficient. System optimization and targeted education are essential for future integration into clinical practice.

Subjective social isolation and associated factors in older people with mild cognitive impairment: The role of sleep quality, fear of dementia, and health empowerment.

Benefits of photon counting CT for the assessment of native heart valves.

Circadian rest-activity rhythm in patients with narcolepsy following modafinil treatment: Outcomes and predictive markers.

Background/Objectives: There is an increasing need for cross-sectional imaging in pediatric patients with congenital heart disease. This patient group is highly sensitive to ionizing radiation. The purpose of this article was to evaluate differences in radiation dose and image quality between a first-generation photon-counting (PC)-CT system and a 256-slice single-source energy-integrating detector (EID)-CT in these patients. Methods: We retrospectively assessed effective dose, CT dose index-volume (CTDIvol), dose length product (DLP), and image quality of all prospectively electrocardiography-gated CTs of the thorax in all patients &lt; 18 years of age examined between February 2021 and August 2024 (n = 43). Two independent observers subjectively scored image quality, vascular contrast, and noise on a 5-point Likert scale. In addition, we assessed the signal-to-noise-ratio (SNR) and contrast-to-noise-ratio (CNR) quantitatively. Results: All dose parameters were significantly lower in the PC-CT (n = 27) versus the EID-CT (n = 16) group (mean effective dose: 0.8 ± 0.64 versus 2.2 ± 0.88 mSv, p &lt; 0.001; mean CTDIvol: 1.22 ± 0.96 versus 4.8 ± 1.08 mGy, p &lt; 0.001; mean DLP: 30.7 ± 31.9 versus 73.7 ± 50.7 mGy*cm, p &lt; 0.001). Overall subjective image quality and contrast were rated higher in the PC-CT group (p = 0.046 and &lt; 0.001, respectively). Quantitative CNR was significantly higher in the PC-CT group (mean 39.1 ± 12.9 versus 26.2 ± 10.8, p = 0.002). Conclusions: PC-CT enables high-quality examinations for the evaluation of congenital heart disease with a highly significant dose reduction compared with a 256-slice single-source EID-CT.

Caregiver outcomes related to sleep disturbances in persons living with cognitive impairment.

Latent profile analysis of impulsivity in adolescents and the relationship with sleep quality: A multicenter cross-sectional study in western China.

Abstract It has become increasingly difficult to distinguish between human subject research and before-after quality improvement projects that do not require informed consent. Is there a boundary between human subject research and quality improvement projects? If so, is it a sharp line or a gray zone?

Respondent and non-respondent profiles for at-risk adolescents following a personalised, transdiagnostic, selective preventive intervention.

Sleep disturbances have increasingly been linked to dysregulation of the immune-inflammatory system. However, evidence regarding such alterations in patients with chronic insomnia disorder (CID) remains limited. This study aimed to characterize the inflammatory cytokine profile of CID and to investigate its association with subjective sleep quality. Thirty-two patients with CID were recruited from the Sleep Medicine Center at the First Affiliated Hospital of Jinan University between January 2024 and June 2025, along with 31 community-recruited healthy controls. Depressive symptoms, anxiety symptoms, and subjective sleep quality were assessed using the 17-item Hamilton Depression Rating Scale (HAMD-17), Hamilton Anxiety Rating Scale (HAMA), and Pittsburgh Sleep Quality Index (PSQI), respectively. Serum levels of IL-1β, CRP, IL-6, IL-8, IFN-γ, TNF-α, and IL-10 were measured using enzyme-linked immunosorbent assay (ELISA). Finally, Spearman correlation and receiver operating characteristic (ROC) analyses were performed. Compared with healthy controls, patients with CID had higher IL-1β and IFN-γ levels and lower IL-10 levels (all P < 0.05). IL-1β levels were positively correlated with the PSQI total score (r = 0.429, P = 0.003), whereas IL-10 levels were negatively correlated with the PSQI total score (r = - 0.540, P = 0.013). ROC analyses showed that IL-1β alone (AUC = 0.752; 95% CI: 0.635-0.869; P < 0.001) and a combined model incorporating IL-1β, IFN-γ, and IL-10 (AUC = 0.752; 95% CI: 0.637-0.867; P < 0.001) had comparable discriminative performance for CID. Patients with CID exhibit altered inflammatory cytokine levels, and some of these alterations were associated with subjective sleep quality, suggesting that immune-inflammatory dysregulation may be involved in the pathophysiology of CID. Not applicable.

Clinical and craniofacial predictors of patient-reported and respiratory outcomes with oral appliance therapy.

This study examined the relationship between class size and academic performance in Business Studies among junior secondary school students in Kosofe Local Government Area, Lagos State. Using a correlational research design, data were collected from 100 students across four public schools through archival records and perception surveys. Descriptive statistics revealed that class sizes were generally large, with some exceeding 90 students, while academic performance was predominantly average. Pearson correlation analysis indicated a significant negative relationship between class size and academic performance (r = –0.59, p &lt; 0.05), suggesting that overcrowded classrooms adversely affect learning outcomes. Additionally, a positive correlation was observed between class size and perception scores, reflecting students’ awareness of the challenges posed by large classes. The findings underscore the need for policy interventions to reduce class sizes and improve instructional quality in skill-based subjects

The prescription of cardiac MRI (CMR) image planes is essential for comparable volumetric assessment, but manual planning is time-consuming and error-prone. This prospective single-center study evaluated automated planning and its impact on the reproducibility of volumetric parameters derived from CMR. Fifty-two healthy volunteers (26 males, median age 44.5 years) were divided into a 1.5 T sub-cohort (n = 32, both scans at 1.5 T, interval 2-5 weeks) and a 3 T sub-cohort (n = 20, 1st scan 1.5 T, 2nd scan 3 T, interval 1-2 h). All scans were performed using automated and manual planning with identical protocols, acquiring standard cardiac planes. Subjective quality of plane position was rated blinded by two radiologists. Volumetric analysis was performed fully automatically without corrections on SAX, retrieving right ventricular (RV) and left ventricular (LV) parameters. Wilcoxon matched-pairs signed rank test, intraclass correlation coefficient (ICC), and Bland-Altman analysis were used for statistical assessment. Subjective quality of image planes showed high consistency with good to excellent ratings in both sub-cohorts. Reproducibility of volumetric parameters was good to excellent (all ICC > 0.77) except for LVEF (1.5 T sub-cohort: LVEF manual: 0.323; automated: 0.213; 3 T sub-cohort: LVEF manual: 0.597; automated: 0.742). Overall, reproducibility was better in the 3 T sub-cohort, mainly due to different scan intervals. ICCs were slightly higher compared to manual planning across both sub-cohorts. These trends were also observed in the Bland-Altman analysis. Fully automated plane positioning for CMR provides high-quality image planes, ensuring high reproducibility of cardiac volumetric parameters across both established field strengths. Question The prescription of CMR image planes is essential for a comparable volumetric cardiac analysis, but manual planning is time-consuming and error-prone. Findings Automated plane prescription for CMR provides high-quality image planes, ensuring high reliability and reproducibility of cardiac volumetric parameters across both established field strengths. Clinical relevance Automated plane prescription for CMR reliably provides high-quality image planes, ensuring comparable cardiac volumetric parameters. This technology can simplify the acquisition and promises to reduce variability between follow-up scans, as well as to enhance the availability for patients.