Xiaoyue Liu

Abstract

Poor sleep is a concerning public health problem in the United States. Previous sleep interventions often face barriers such as high costs, limited accessibility, and low user engagement. Recent advancements in artificial intelligence (AI) technologies offer a novel approach to overcoming these limitations. In response, our team developed a prototype AI sleep chatbot powered by a large language model to deliver personalized, accessible sleep support.

Abstract

Racial/ethnic disparities in sleep outcomes may compound cardiovascular health (CVH) risks, particularly among adults with hypertension (HTN). This study examines differences in sleep health across racial/ethnic groups, with a primary focus on adults with HTN.

Abstract

Aim: Heart failure is a leading cause of hospitalisation and often coexists with seven comorbid conditions on average. This study aimed to examine the gender differences in disease burden, symptom burden, and quality of life among older adults with heart failure and multimorbidity. Design: Cross-sectional study. Methods: This study utilised a baseline survey from an ongoing cohort study in 2022–2023. Adults aged ≥ 50 years with heart failure and more than one chronic condition were recruited from a university-affiliated hospital using an electronic patient portal. Disease burden was measured using a modified Disease Burden Impact Scale. The Edmonton Symptom Assessment Scale and EuroQoL-5D-5L assessed symptom burden and quality of life. Gender differences in baseline outcomes were examined using Pearson's Chi-square tests, Welch's t-tests, and multiple linear regressions. Results: Among 353 participants who completed the baseline survey, the mean (±SD) age was 70 (±9.5) years, and 50.1% were women (mean age: 67 ± 9 vs. men: 72 ± 10). In adjusted models, women had 4.9 points higher disease burden (p = 0.003) and reported higher symptom scores of pain (p = 0.018), tiredness (p = 0.021), nausea (p = 0.007), and loss of appetite compared to men (p = 0.036). Women had significantly more moderate/severe problems in usual activities and pain/discomfort and 0.07 points lower EuroQoL index than men (p = 0.010). Conclusions: There were gender differences in disease/symptom burdens and quality of life. Women living with heart failure and multimorbidity had higher burdens but lower quality of life. Impact: Identifying gender differences among people with heart failure and multimorbidity can be the first step to explaining health disparities. Research should take more inclusive and equitable approaches to address these differences. Healthcare providers, including nurses, should implement targeted strategies for effective multimorbidity management by considering these differences and disparities in clinical settings. Reporting Method: STROBE checklist, cross-sectional. Patient or Public Contribution: No patient or public contribution.

Abstract

A tendency to obstruct the upper airway is markedly increased in supine sleep. Positional obstructive sleep apnea (OSA) (POSA) occurs predominantly in the supine position. The implication of POSA in terms of future cardiovascular (CV) risk is unknown. We hypothesized that patients with POSA have decreased future CV risks compared to OSA patients without POSA (non-POSA).

Abstract

Background: A tendency to obstruct the upper airway is markedly increased in supine sleep. Positional obstructive sleep apnea (OSA) (POSA) occurs predominantly in the supine position. The implication of POSA in terms of future cardiovascular (CV) risk is unknown. We hypothesized that patients with POSA have decreased future CV risks compared to OSA patients without POSA (non-POSA). Methods: This single-center study included patients who underwent clinically indicated polysomnography. POSA was defined as an apnea-hypopnea index (AHI) ≥ 5 events/hour and supine AHI at least twice as high as non-supine AHI (nsAHI). Exclusive POSA (ePOSA) includes the additional requirement that the nsAHI normalizes to an AHI of < 5/hour. A Cox proportional hazard model was used to assess the future risk of new CV events in patients with POSA compared to non-POSA (reference group). Results: There were 3,779 patients (mean age 51, female 59.7%), consisting of 35.9% POSA, 38.4% non-POSA, and 25.7% no OSA. Using the ePOSA definition, 17.3% had ePOSA, 57.1% had non-ePOSA, and 25.7% had no OSA. Over a median 8.4 years, there were 1,297 composite events. Patients with POSA had a lower risk of CV events compared to non-POSA (HR 0.85, CI:0.74–0.96; p = 0.010). There was a non-significant trend towards lower risk of CV events in patients with ePOSA compared to non-ePOSA (HR 0.86, CI:0.73–1.01; p = 0.061). Conclusions: POSA is associated with lower CV risk than non-POSA. Future studies should consider POSA as a distinct subtype when studying OSA and CV outcomes.

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Abstract

Poor sleep quality and psychological stress are interrelated and disproportionately affect adults with multiple cardiovascular disease (CVD) risk factors. Maintaining an optimal home environment and engaging in healthy bedtime behaviors are important components of sleep hygiene practices that influence sleep health. This study sought to examine: (1) the association between sleep hygiene and psychological stress, and (2) the moderating effect of sleep quality in the relationship between sleep hygiene and psychological stress, among adults with multiple CVD risk factors. A cross-sectional study was conducted with 300 adults diagnosed with hypertension and diabetes. Individuals were recruited from a large academic health center and were asked to complete an online survey. Sleep hygiene was assessed by nine individual factors focusing on negative household environment (safety, physical comfort, temperature, noise, and light) and poor bedtime behaviors (watching TV, playing video games, using small screens, and eating), and by a composite score. Multivariable linear regression was employed to examine the associations. Of the sample, 78% reported poor sleep quality and 44% reported high psychological stress. The composite sleep hygiene score was significantly associated with higher psychological stress after controlling for sleep quality, and the relationship was not modified by sleep quality. Unsafe household, uncomfortable physical environment, uncomfortable temperature, and eating at bedtime were independently related to increased stress levels. The study highlights strong links between sleep hygiene and psychological stress. Current evidence suggests that promoting home environment and bedtime behaviors may alleviate psychological burdens in adults with multiple CVD risk factors.

Abstract

Shared decision-making (SDM) is a collaborative process between clinicians and patients. While SDM is known to enhance blood pressure control in adults with hypertension, the impact of sociodemographic and clinical characteristics on SDM remains unclear.

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Abstract

Obstructive sleep apnea (OSA), a condition with high prevalence, is characterized by reduced dilatory function of pharyngeal muscles, which can be influenced by upper airway narrowing, dilator muscle dysfunction, respiratory dysfunction, and genetics. Three of the most clinically important phenotypes of OSA include disturbed sleep, excessive sleepiness, and minimal symptoms, with varying implications for management and morbidity. This article reviews current perspectives on these OSA phenotypes, as well as the process of confirming a diagnosis of OSA. Lastly, this article delineates various current and future OSA therapy approaches through review and analysis of the existing literature with discussion on the outlook for OSA treatment.