1. Sleep disorders in cancer patients

   • Osamu Itani

   Editorial 20 August 2021 Pages: 341 - 342

2. A school-based sleep education program to improve sleep duration, latency, and efficiency of Spanish children

   • Manuel Ávila-García
   • Francisco Javier Huertas-Delgado
   • Pablo Tercedor

   Original Article 17 April 2021 Pages: 343 - 351

3. Sleep quality according to the Pittsburgh Sleep Quality Index in over 7000 pregnant women in Poland

   • Magdalena Smyka
   • Katarzyna Kosińska-Kaczyńska
   • Mirosław Wielgoś

   Original Article Open access 04 May 2021 Pages: 353 - 360

4. Elevated perceived stress scale (PSS) scores are associated with increased risk of poor sleep assessed by global PSQI scores: cancer and hypnotics-stratified analysis in an adult population-based study

   • Yilin Xu
   • Anwen Liu

   Original Article 05 May 2021 Pages: 361 - 368

   

5. Subjective sleep quality, quantitative sleep features, and their associations dependent on demographic characteristics, habitual sleep–wake patterns, and distinction of weekdays/weekends

   • Siwalee Choilek
   • Akihiro Karashima
   • Mitsuyuki Nakao

   Original Article Open access 09 May 2021 Pages: 369 - 381

   

6. Sleep disturbances in essential tremor: an investigation of associated brain microstructural changes using diffusion tensor imaging

   • Yildizhan Sengul
   • Hafize Otcu Temur
   • Elan D. Louis

   Original Article 21 May 2021 Pages: 383 - 391

   

7. Obsessive–compulsive disorder in restless legs syndrome

   • Yuksel Erdal
   • Seyma Perk
   • Ufuk Emre

   Original Article 25 May 2021 Pages: 393 - 398

8. The association between beta-blocker therapy and daytime sleepiness in obstructive sleep apnoea

   • Martina Meszaros
   • Alexander G. Mathioudakis
   • Andras Bikov

   Original Article Open access 12 June 2021 Pages: 399 - 408

   

9. Regional variations in the utilization of adaptive servo-ventilation and continuous positive airway pressure in Japan: data from the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) Open Data Japan

   • Tomoyuki Saito
   • Shuko Nojiri
   • Takatoshi Kasai

   Original Article 25 June 2021 Pages: 409 - 422

   

10. Prevalence and predictors of REM sleep without atonia in a sleep clinic population

    • C. Yu
    • J. Stonehouse
    • Garun S. Hamilton

    Original Article 18 June 2021 Pages: 423 - 431

    

11. Combined and isolated effects of alcohol consumption and sleep deprivation on maximal strength, muscle endurance and aerobic exercise performance in healthy men: a cross-over randomized controlled trial

    • Rodrigo Rodrigues
    • Rodrigo de Azevedo Franke
    • Marco Aurélio Vaz

    Original Article 16 June 2021 Pages: 433 - 441

    

12. Application of the Chinese version of the 11-item circadian-type inventory (CTI-11) in a working sample

    • Dongfang Wang
    • Huilin Chen
    • Xianchen Liu

    Original Article 23 June 2021 Pages: 443 - 451

    

13. Prevalence of restless legs syndrome: a cross-sectional population-based study from northwest of Turkey

    • Selma Aksoy
    • Esen Eker
    • Handan Isin Ozisik Karaman

    Original Article 25 June 2021 Pages: 453 - 458

    

14. Validity and reliability of the Turkish version of the insomnia catastrophizing scale

    • Fedai Kabadayi
    • Oğuz Mercan
    • Baki Büyüksevindik

    Original Article 24 June 2021 Pages: 459 - 466

15. Sleep disturbance among frontline nurses during the COVID-19 pandemic

    • Mohammed Al Maqbali

    Original Article Open access 01 July 2021 Pages: 467 - 473