Validation of a novel sleep-quality questionnaire to assess sleep in the coronary care unit: a polysomnography study

INTRODUCTION

The sleep of patients admitted to coronary care unit (CCU) may be compromised. A feasible and cost-effective tool to evaluate sleep in this scenario could provide important data. The aim of this study was to evaluate sleep with a questionnaire developed specifically for the CCU and to validate it with polysomnography (PSG).

METHODS

Ninety-nine patients (68% male; 56 ± 10 years old) with acute coronary syndrome were included. PSG was performed within 36 h of admission. A specific 18-question questionnaire (CCU questionnaire) was developed and applied after the PSG. Cronbach's alpha test was used to validate the questionnaire. The Spearman test was used to analyze the correlation between the PSG variables and the questionnaire, and the Kruskal-Wallis test was used to compare the PSG variables among patients with good, regular, or poor sleep.

RESULTS

The total sleep time was 265 ± 81 min, sleep efficiency 62 ± 18%, REM sleep 10 ± 7%, apnea/hypopnea index 15 ± 23, and the arousal index 24 ± 15. Cronbach's alpha test was 0.69. The CCU questionnaire showed correlation with the sleep efficiency evaluated by PSG (r: 0.52; p < 0.001). Sleep quality was divided into three categories according to the CCU questionnaire: patients with good sleep had a sleep efficiency of 72 ± 9%, better than those with a regular or poor sleep (60 ± 16% and 53 ± 20%, respectively; p < 0.01).

CONCLUSION

The CCU questionnaire is a feasible and reliable tool to evaluate sleep in the CCU, showing correlation with the PSG sleep efficiency.

Quality of life of surgical oncology residents and fellows across Europe

BACKGROUND

Data are currently lacking regarding the quality of life of surgical oncology (SO) trainees. We sought to assess the training conditions and quality of life of SO residents and fellows across Europe.

MATERIAL AND METHODS

Members of the European Society for Surgical Oncology were invited to complete a Web-based survey that included a questionnaire specifically designed for SO trainees. Demographics, timing, and incentive to choose for SO, quality of life, and symptoms of fatigue, sleepiness, depression, and burnout, as well as self-reported medical errors, were assessed using validated instruments.

RESULTS

The survey was completed by 109 residents and 53 fellows (mean age 34.6 ± 8.2). The mean Linear Analog Scale Assessment score for quality of life was 34.8 ± 8.6 out of a possible 50. A low level of fatigue was declared by 60% of the trainees. However, 44% scored an abnormal Epworth Sleepiness score, which was mostly related to in-hospital work time and lack of educational programs. High positive screenings regarding depression (51%) and burnout (25%) were associated with resident status and lack of mentorship, respectively. Major medical errors during the last 3 months were self-reported by 20% of the trainees.

CONCLUSIONS

In Europe, the perceived quality of life is overall acceptable among trainees in SO. However, the present study demonstrated a high level of sleepiness, depression, and burnout symptoms. Additional work is required to identify and overcome the underlying causes of these symptoms.

The times they're a-changing: effects of circadian desynchronization on physiology and disease

Circadian rhythms are endogenous and need to be continuously entrained (synchronized) with the environment. Entrainment includes both coupling internal oscillators to external periodic changes as well as synchrony between the central clock and peripheral oscillators, which have been shown to exhibit different phases and resynchronization speed. Temporal desynchronization induces diverse physiological alterations that ultimately decrease quality of life and induces pathological situations. Indeed, there is a considerable amount of evidence regarding the deleterious effect of circadian dysfunction on overall health or on disease onset and progression, both in human studies and in animal models. In this review we discuss the general features of circadian entrainment and introduce diverse experimental models of desynchronization. In addition, we focus on metabolic, immune and cognitive alterations under situations of acute or chronic circadian desynchronization, as exemplified by jet-lag and shiftwork schedules. Moreover, such situations might lead to an enhanced susceptibility to diverse cancer types. Possible interventions (including light exposure, scheduled timing for meals and use of chronobiotics) are also discussed.