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The objective of this study was to assess determinants of poor sleep quality which is an under-diagnosed and under-treated problem in elderly patients with diabetes mellitus, hyperlipidemia and hypertension.
Background
Poor sleep quality is linked to decreased quality of life, increased morbidity and mortality. Poor sleep quality is common in the elderly population with associated cardiometabolic risk factors such as diabetes, hyperlipidemia and hypertension.
Methods
This is a cross-sectional study undertaken in the primary healthcare setting (Singhealth Polyclinics-Outram) in Singapore. Singaporeans aged 65 years and above who had at least one of the three cardiometabolic risk factors (diabetes, hypertension and hyperlipidemia) were identified. Responders’ sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI) questionnaire and were divided into those with good quality sleep and those with poor quality sleep, based on the PSQI score. Information on demographics, co-morbidities and lifestyle practices were collected. Descriptive and multivariate analyses of determinants of poor sleep were determined.
Findings
There were 199 responders (response rate 88.1%). Nocturia (adjusted prevalence rate ratio 1.54, 95% confidence interval 1.06–2.26) was found to be associated with an increased risk of poor sleep quality in elderly patients with diabetes mellitus, hypertension and hyperlipidaemia. Nocturia, a prevalent problem in the Asian elderly population, has been found to be associated with poor sleep quality in our study. Hence, it is imperative to identify and treat patients with nocturia to improve sleep quality among them.
Nocturia has a detrimental influence on life expectancy, health, and overall quality of life. Its prevalence is fairly equal in men and women and shows an age-related increase in both sexes. There are numerous medical conditions that are associated with increased nocturnal voiding, such as cardiac diseases, diabetes, obesity, edemas of different origins, and sleep apnea. On the basis of analyses of information collected from frequency-volume charts, the pathophysiological conditions underlying nocturia can be categorized as: nocturnal polyuria, a low nocturnal bladder capacity, or a combination of the two. Clinical conditions should be treated as appropriately as possible before more specific treatment of nocturia is considered. Clinical trials have specifically addressed the use of medications for treating nocturia through improvement of bladder capacity. Estrogen treatment has been shown to have a favorable influence on urological symptoms in general, but studies indicating a specific effect on nocturia are lacking.
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