Prevalence and risk factors for restless legs syndrome during pregnancy in a Northern Italian population

The complexities in the differential diagnosis of restless legs syndrome (Willis-Ekbom disease)

INTRODUCTION

We present a literature review on the clinical conundrums surrounding the differential diagnosis of restless legs syndrome (RLS, Willis-Ekbom disease), as well as conditions that can mimic RLS. An extensive literature search showed that secondary causes of RLS ranged from commonly recognized causes, such as iron deficiency anemia, to less widely noted causes, such as rheumatoid disorders and hypothyroidism. There is a controversial association with Parkinson's disease, essential tremor, and RLS, whereby RLS is proposed as a prodromal feature.

AREAS COVERED

The clinical presentation of restless legs syndrome (RLS), a highly prevalent movement disorder usually during sleep with a circadian variation. The review highlights differences between commonly established secondary causes of RLS, RLS mimics, genetic and drug-induced RLS. A flowchart presents some key features of different and overlapping secondary RLS and mimics and genetic RLS.

EXPERT OPINION

RLS is one of the commonest movement disorders and the International Restless Legs Syndrome Study Group has suggested five-point criteria for robust diagnosis of RLS. However, even in expert hands, diagnosis is accurate in about 85% and misdiagnosis, especially with 'RLS mimics,' appears to be high. There are wide variations in the way RLS can present, and this includes different types of secondary RLS as well as drug induced or genetic patterns of RLS. Secondary RLS is highly complex and can be associated with Parkinson's disease as well as prodromal stage of Parkinson and essential tremor. Other known causes of secondary RLS are many and include end-stage kidney disease as well as metabolic disorders to painful conditions such as rheumatic disorders and fibromyalgia and polyradiculopathy.

Obstructive Sleep Apnea in Pregnancy: A Comprehensive Review of Maternal and Fetal Implications

Obstructive sleep apnea (OSA) is a prevalent yet underdiagnosed condition in pregnancy, associated with various maternal and fetal complications. This review synthesizes the current evidence on the epidemiology, pathophysiology, and neurological consequences of OSA in pregnancy, along with the potential management strategies. Articles were sourced from the PubMed, EMBASE, and Cochrane databases until 2023. Our comprehensive review highlights that the incidence of OSA increases during pregnancy due to physiological changes such as weight gain and hormonal fluctuations. OSA in pregnancy is linked with gestational hypertension, pre-eclampsia, gestational diabetes, and potential adverse fetal outcomes such as intrauterine growth restriction and preterm birth. Continuous positive airway pressure (CPAP) therapy remains the most effective management strategy for pregnant women with OSA. However, adherence to CPAP therapy is often suboptimal. This comprehensive review underscores the importance of the early recognition, timely diagnosis, and effective management of OSA in pregnancy to improve both maternal and fetal outcomes. Future research should focus on enhancing screening strategies and improving adherence to CPAP therapy in this population.

Evaluation of the relationship between restless legs syndrome, mental status, and sleep disorders among Moroccan women during their third trimester of pregnancy

Background

Restless legs syndrome (RLS) is a motor disorder encountered during pregnancy and leads to psychological and sleep impairments. The latter seems to be non-restorative and its occurrence alters the quality of life of pregnant women. The objective of this study was to evaluate the prevalence of RLS and its relationship with both anxio-depressive symptoms and sleep disorders among a population of Moroccan pregnant women during their third trimester of pregnancy.

Methods

A cross-sectional study was conducted in a population of pregnant women in their third trimester (n=178) admitted to two health facilities in the city of Marrakech: Youssef Ibn Tachafine and Oasis. The face-to-face questionnaire was used to collect data including demographic and clinical characteristics, the four diagnostic criteria of RLS, the Pittsburgh Sleep Quality Index (PSQI), and the Hospital Anxiety and Depression Scale (HADS). Patients were divided into two groups RLS+ (women with RLS) and RLS- (women without RLS).

Results

The prevalence of RLS was 59.5%; this syndrome was more common in the ninth month (74.15%) compared with the seventh and eighth months. Sleep impairment, including sleep efficiency, was significantly higher in RLS+ than RLS- (P-value 0.05). Anxiety but not depression is significantly increased in RLS+ compared to RLS- (48.11% versus 38.8%, P = 0.000). There were no significant differences between RLS+ and RLS- in terms of socio-demographic and other clinical characteristics.

Conclusion

RLS is encountered during the prenatal period, with a higher prevalence in the last trimester. During this stage of pregnancy, women suffering from RLS were vulnerable to anxiety and sleep disorders. Prevention and early diagnosis of RLS could be a proactive healthcare management leading to better health outcomes and better conditions of pregnancy, which precedes childbirth.

Sleep and sleep disorders during pregnancy and postpartum: The Life-ON study

OBJECTIVE

to prospectively assess sleep and sleep disorders during pregnancy and postpartum in a large cohort of women.

METHODS

multicenter prospective Life-ON study, recruiting consecutive pregnant women at a gestational age between 10 and 15 weeks, from the local gynecological departments. The study included home polysomnography performed between the 23rd and 25th week of pregnancy and sleep-related questionnaires at 9 points in time during pregnancy and 6 months postpartum.

RESULTS

439 pregnant women (mean age 33.7 ± 4.2 yrs) were enrolled. Poor quality of sleep was reported by 34% of women in the first trimester of pregnancy, by 46% of women in the third trimester, and by as many as 71% of women in the first month after delivery. A similar trend was seen for insomnia. Excessive daytime sleepiness peaked in the first trimester (30% of women), and decreased in the third trimester, to 22% of women. Prevalence of restless legs syndrome was 25%, with a peak in the third trimester of pregnancy. Polysomnographic data, available for 353 women, revealed that 24% of women slept less than 6 h, and 30.6% of women had a sleep efficiency below 80%. Sleep-disordered breathing (RDI≥5) had a prevalence of 4.2% and correlated positively with BMI.

CONCLUSIONS

The Life-ON study provides the largest polysomnographic dataset coupled with longitudinal subjective assessments of sleep quality in pregnant women to date. Sleep disorders are highly frequent and distributed differently during pregnancy and postpartum. Routine assessment of sleep disturbances in the perinatal period is necessary to improve early detection and clinical management.

The Prevalence, Severity, and Predictive Factors of Restless Legs Syndrome in Pregnancy

OBJECTIVES

 The current study aimed to search the prevalence and severity of restless legs syndrome (RLS) in pregnancy according to the three trimesters and predictive factors of RLS in pregnancy based on validated diagnostic tools and a thorough literature review.

METHODS

The cross-sectional descriptive study included 500 pregnant women without comorbidities who were interviewed face-to-face. Age, height, weight, week of pregnancy, smoking, alcohol, caffeine use, regular exercise, and lab test results from the last visit were all included in the data. Only women satisfying the RLS diagnostic criteria were given the Restless Legs Syndrome Rating Scale.

RESULTS

The prevalence of RLS was found to be 29.2% with the highest rate in the third trimester (64.4%). In all trimesters, low ferritin (first trimester: p = 0.004; second trimester: p < 0.001; third trimester: p < 0.001), folic acid (first trimester: p = 0.001; second trimester: p < 0.001; third trimester: p < 0.001), vitamin B12 (first trimester: p = 0.003; second trimester: p < 0.001; third trimester: p < 0.001), and hemoglobin (first trimester: p < 0.001; second trimester: p < 0.001; third trimester: p < 0.001) levels were associated with RLS. In the second and third trimesters, low magnesium (p < 0.001 and p < 0.001, respectively) and high creatinine (p = 0.027 and p < 0.001, respectively) levels were associated with RLS. Higher thyroid-stimulating hormone and free T4 levels were associated with RLS in the third trimester but not in the first and second trimesters (median: 2.4 vs. 2.1, p < 0.001; median: 1.5 vs. 1.2, p < 0.001). In the multivariate regression analysis, age (p = 0.034, OR: 1.060, 95% CI: 1.005-1.119), present BMI (p < 0.001, OR: 1.8884, 95% CI: 1.597-2.222), BMI before conception (p < 0.001, OR: 0.607, 95% CI: 0.513-0.718), gravida (p < 0.001, OR: 2.172, 95% CI: 1.547-3.049), low ferritin level (p < 0.001, OR: 6.396, 95% CI: 0.00744-0.010405), low vitamin B12 (p < 0.001, OR: 10.347, 95% CI: 0.00120-0.00176), low folate (p < 0.001, OR: 5.841, 95% CI: 0.00616-0.01240), RLS history before conception (p = 0.013, OR: 4.963, 95% CI: 1.402-17.57), and RLS family history (p < 0.001, OR: 7.914, 95% CI: 0.18760-0.31151) were found to be predictive factors for RLS in pregnancy.

CONCLUSION

More attention is needed to RLS during pregnancy to prevent or treat this syndrome.

Common sleep disorders in pregnancy: a review

In this review, we provide a comprehensive overview of common sleep disorders during pregnancy, including their characterization, prevalence, risk factors, and possible contribution to maternal and fetal outcomes. We conducted a quasi-systematic literature search of the MEDLINE database and identified 744 studies from 1991 through 2021, inclusive, that met our inclusion criteria. We synthesized the existing literature on sleep disorders during pregnancy and highlighted controversies, research gaps, and needed clinical developments. Our review covers a range of sleep disorders, including insomnia, obstructive sleep apnea, restless legs syndrome, and circadian rhythm disorders. We discuss the prevalence of these disorders in pregnancy and their potential impact on maternal and fetal health outcomes. We also explore the relationship between sleep disorders, pre-pregnancy comorbidities such as obesity, and pregnancy-related conditions such as gestational diabetes mellitus and preeclampsia. In addition to summarizing the existing literature on sleep disorders during pregnancy, we also highlight opportunities for further research in this area. We suggest that future studies should strive to employ validated and objective measurement tools for sleep disorders and prioritize utilization of longitudinal methods with participant follow-up through postpartum, mid-life, menopause, and beyond. We also put forward investigation into the impact of circadian rhythm disruption on reproductive physiology and early pregnancy outcomes as an area of important work. Overall, our review provides valuable insights on sleep and reproduction and into common sleep disorders during pregnancy and their potential impact on maternal and fetal health outcomes.

The Prevalence of Restless Legs Syndrome Among Pregnant Women in Saudi Arabia

INTRODUCTION

Pregnancy has been associated with restless legs syndrome (RLS). RLS is underdiagnosed in most countries. The purpose of this study was to assess the prevalence of RLS among Saudi pregnant women.

METHODS

This cross-sectional study included 459 pregnant women from all Saudi provinces between December 2022 and March 2023. A structured online questionnaire assessing demographic and pregnancy characteristics, medical conditions, sleep quality, and RLS symptoms was conducted.

RESULTS

The prevalence of RLS was 26.6% among the participants. Calcium deficiency was significantly associated with RLS (adjusted odds ratio (OR)=2.16, 95% confidence interval (CI)=1.2-3.9, p=0.01), but there was no significant association between RLS and vitamin D and iron deficiencies (p>0.05), according to multivariate binary logistic regression analysis. Moreover, RLS increased the risk of insomnia and frequent waking up (adjusted OR=4.95, 95% CI=2.50-9.83, p<0.001, and adjusted OR=2.87, 95% CI=1.55-5.32, p=0.001, respectively).

CONCLUSION

RLS is common among pregnant women in Saudi Arabia. The study indicates that RLS during pregnancy is linked to calcium deficiency and negatively affects sleep quality.

Sleep During Pregnancy

PURPOSE OF REVIEW

This article will provide a brief review of most recent findings of sleep, insomnia, obstructive sleep apnea, and restless leg syndrome during pregnancy.

RECENT FINDINGS

Recent meta-analyses have found that 38.2% of pregnant women experience insomnia, 15% experience obstructive sleep apnea, and 20% experience restless leg syndrome. Poor sleep during pregnancy is associated with increased odds of preterm birth, cesarean section, hypertension, gestational diabetes, and longer deliveries. OSA is also associated with poor outcomes such as maternal hypertension, gestational diabetes, preterm birth, and low infant Apgar score. Incidence of new-onset RLS increases with parity, gestational age, maternal age, and increased maternal adiposity. Typical treatments have been found to be effective for treating sleep disorders in pregnant women. Obtaining sufficient sleep quality and quantity in addition to assessing and treating sleep disorders should be a priority for pregnant women and their providers.

Prevalence of restless leg syndrome and effects on quality of life during pregnancy

PURPOSE

Restless leg syndrome (RLS) is a movement disorder which constitutes the most common and major risk group during pregnancy. The purpose of this study was to determine prevalence and severity of RLS during pregnancy and to investigate the effect of RLS on quality of life in pregnant women.

METHODS

This cross-sectional study was conducted in antenatal clinics of four different public hospitals. Data collected were pregnancy assessment form, RLS diagnostic criteria form, RLS severity scale, and SF-12 quality of life scale.

RESULTS

Among 718 pregnant women, mean age was 28.3±5.9 years (range 19 to 45). According to the diagnostic criteria of RLS, RLS prevalence was 22% (n=159). Of the 159 women with RLS, 41% had moderate severity and 40% had severe RLS. Prevalence of RLS in pregnant women increased with gestational week, working time during pregnancy, weight before pregnancy, total weight gain during pregnancy, and pre-pregnancy body mass index. Physical health scores, physical functioning scores, pain scores, emotional role difficulty scores, and social function scores were significantly lower in the pregnant women with RLS than without RLS (p <0.05).

CONCLUSIONS

Approximately one-fifth of the pregnant women had RLS, mostly in the third trimester, and the severity of RLS was predominantly moderate and severe. Pregnant women with RLS had poorer quality of life than pregnant women without RLS.

Sleep and sleep disorders in pregnancy

Pregnancy is associated with a number of physiologic changes in the body including hormonal, anatomical, and mechanical. These changes alter many physiologic functions including sleep. The literature suggests that a number of women develop changes in duration, pattern, and quality of sleep during pregnancy. In addition, these changes also pave the way for expression of sleep disorders (e.g., insomnia, obstructive sleep apnea, and restless legs syndrome). Change in sleep and appearance of sleep disorders not only influence pregnant women, but also have negative influences on the fetus and outcomes of pregnancy. However, optimal management of these disorders may reverse adverse consequences. In this chapter, risk factors, clinical presentation, and management of insomnia, obstructive sleep apnea, and restless legs syndrome during pregnancy are discussed in view of the available literature.