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  1. AU=Budhiraja Rohit
  2. AU="Tonjes, M B"
  3. AU="Vande More, A M"
  4. AU="Gangireddy, Pavan Kumar Reddy"
  5. AU="Marlier, Arnaud"
  6. AU="Nerone, Marta"
  7. AU="Hou, Ping"
  8. AU=Sommerstein Rami AU=Sommerstein Rami
  9. AU="Zocchi, Kent"
  10. AU="Pandey, Jitendra Kumar"
  11. AU=Nzila Alexis
  12. AU="Vallurupalli, Anusha"

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  1. Artikel ; Online: Sleep study documentation: is less more, or is more better?

    Budhiraja, Rohit

    Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

    2023  Band 19, Heft 6, Seite(n) 1013–1014

    Mesh-Begriff(e) Humans ; Sleep ; Polysomnography ; Documentation
    Sprache Englisch
    Erscheinungsdatum 2023-03-22
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 2397213-0
    ISSN 1550-9397 ; 1550-9389
    ISSN (online) 1550-9397
    ISSN 1550-9389
    DOI 10.5664/jcsm.10560
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Long-term All-Cause Mortality Risk in Obstructive Sleep Apnea Using Hypopneas Defined by a ≥3 Percent Oxygen Desaturation or Arousal.

    Budhiraja, Rohit / Quan, Stuart F

    Southwest journal of pulmonary & critical care

    2021  Band 23, Seite(n) 23–35

    Abstract: Study objectives: Some prior studies have demonstrated an increase in mortality associated with obstructive sleep apnea (OSA) utilizing a definition of OSA that requires a minimum 4% oxygen desaturation to identify a hypopnea. No large community-based ... ...

    Abstract Study objectives: Some prior studies have demonstrated an increase in mortality associated with obstructive sleep apnea (OSA) utilizing a definition of OSA that requires a minimum 4% oxygen desaturation to identify a hypopnea. No large community-based studies have determined the risk of long-term mortality with OSA with hypopneas defined by a ≥3% O
    Methods: Data from 5591 Sleep Heart Health Study participants without prevalent cardiovascular disease at baseline who underwent polysomnography were analyzed regarding OSA diagnosed using the AHI3%A criteria and all-cause mortality over a mean follow up period of 10.9±3.2 years.
    Results: There were 1050 deaths in this group during the follow-up period. A Kaplan-Meir plot of survival revealed a reduction in survival with increasing AHI severity. Cox proportional hazards regression models revealed significantly increased all-cause mortality risk with increasing AHI, hazard ratio (HR, 95% CI) 1.13 (1.04-1.23), after adjusting for age, sex, race, BMI, cholesterol, HDL, self-reported hypertension and/or diabetes and smoking status. In categorical models, the mortality risk was significantly higher with severe OSA [adjusted HR 1.38 (1.09-1.76)]. When stratified by gender or age, severe OSA was associated with increased risk of death in men [adjusted HR 1.14 (1.01-1.28)] and in those <70 years of age [adjusted HR 1.51 (1.02-2.26)]. In contrast, AHI severity was not associated with increased mortality in women or those ≥70 years of age in fully adjusted models.
    Conclusion: Severe AHI3%A OSA is associated with significantly increased mortality risk, especially in men and those <70 years of age.
    Sprache Englisch
    Erscheinungsdatum 2021-08-18
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2160-6773
    ISSN 2160-6773
    DOI 10.13175/swjpcc025-21
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Sleepiness in obstructive sleep apnea using hypopneas defined by a 3% oxygen desaturation or arousal but not by 4% or greater oxygen desaturation.

    Budhiraja, Rohit / Quan, Stuart F

    Sleep & breathing = Schlaf & Atmung

    2021  Band 26, Heft 3, Seite(n) 1135–1139

    Abstract: Study objectives: This analysis determined the association between obstructive sleep apnea (OSA) with hypopneas defined by a 3% O: Methods: Data were analyzed from Sleep Heart Health Study participants who had polysomnography (N = 6307) regarding OSA ...

    Abstract Study objectives: This analysis determined the association between obstructive sleep apnea (OSA) with hypopneas defined by a 3% O
    Methods: Data were analyzed from Sleep Heart Health Study participants who had polysomnography (N = 6307) regarding OSA and subjective sleepiness scores (Epworth Sleepiness Scale, ESS). The apnea hypopnea index (AHI) was classified based on 3% only, 3%A only, and 4% definitions of hypopneas.
    Results: Of the 3326 participants without 4% OSA, 67.6% (n = 2247) had 3%A only OSA. The ESS score was higher in 3%A only OSA than in those without OSA (7.44 ± 4.2 vs 7.07 ± 4.3, P = 0.02). Of those without 4% OSA, 40.2% (n = 1336) had 3% only OSA. The ESS score was higher in those with 3% only OSA than those with no OSA (7.72 ± 4.3 vs 7.05 ± 4.2, P < 0.001). A linear regression model demonstrated a trend towards significance for the 3%A only AHI as an independent predictor of ESS when controlled for age, BMI, and sex (P = 0.051). The association of 3% only AHI with the ESS was stronger (P = 0.003). However, 23.3% of the participants with hypersomnia would not qualify as having OSA if arousals were excluded from the definition of OSA.
    Conclusion: The current study found that the presence and severity of OSA is associated with higher ESS scores in persons with 3%A only OSA. Hence, the use of the 4% hypopnea definition will result in the failure to identify and treat a significant number of individuals with OSA who have subjective sleepiness.
    Mesh-Begriff(e) Arousal ; Humans ; Oxygen ; Polysomnography ; Sleep Apnea, Obstructive ; Sleepiness
    Chemische Substanzen Oxygen (S88TT14065)
    Sprache Englisch
    Erscheinungsdatum 2021-09-26
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 1500381-4
    ISSN 1522-1709 ; 1520-9512
    ISSN (online) 1522-1709
    ISSN 1520-9512
    DOI 10.1007/s11325-021-02494-x
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Incidence of hypertension in obstructive sleep apnea.

    Budhiraja, Rohit / Quan, Stuart F

    Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

    2020  Band 17, Heft 3, Seite(n) 607

    Mesh-Begriff(e) Humans ; Hypertension ; Incidence ; Sleep Apnea, Obstructive
    Sprache Englisch
    Erscheinungsdatum 2020-12-21
    Erscheinungsland United States
    Dokumenttyp Letter ; Comment
    ZDB-ID 2397213-0
    ISSN 1550-9397 ; 1550-9389
    ISSN (online) 1550-9397
    ISSN 1550-9389
    DOI 10.5664/jcsm.9110
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Buch ; Online: Impairments-Aware Receiver Design for IRS-Aided Multi-cell Massive MIMO Systems With Channel Aging and Non-Ideal Hardware

    Munagala, Rakesh / Amudala, Dheeraj Naidu / Budhiraja, Rohit

    2023  

    Abstract: We consider the uplink of a hardware-impaired intelligent reflective surfaces (IRS) aided multi-cell massive multiple-input multiple-output (mMIMO) system with mobile user equipments, whose channel age with time. For this system, we analyze the ... ...

    Abstract We consider the uplink of a hardware-impaired intelligent reflective surfaces (IRS) aided multi-cell massive multiple-input multiple-output (mMIMO) system with mobile user equipments, whose channel age with time. For this system, we analyze the distortion due to hardware impairments, and the effect of channel aging, and propose a novel distortion-and-aging-aware MMSE (DAA-MMSE) receiver that not only provides a higher spectral efficiency (SE) than conventional maximal ratio and distortion-unaware MMSE (DU-MMSE) receivers, but also reduces the pilot overhead. By considering non-ideal hardware and spatially-correlated Rician fading channels with phase shifts, we also derive the SE lower bound for this system. We show that the SE gain of the DAA-MMSE receiver over DU-MMSE receiver increases with hardware impairments, and channel aging. Along with DAA-MMSE receiver, the IRS is also shown to reduce the pilot overhead in a mMIMO system with channel aging.
    Schlagwörter Electrical Engineering and Systems Science - Signal Processing
    Thema/Rubrik (Code) 003
    Erscheinungsdatum 2023-12-14
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel ; Online: Weighing the Impact of CPAP Therapy on Body Mass in Persons With OSA.

    Budhiraja, Rohit / Quan, Stuart F

    Chest

    2019  Band 155, Heft 4, Seite(n) 657–658

    Mesh-Begriff(e) Cardiovascular Diseases ; Comorbidity ; Continuous Positive Airway Pressure ; Humans ; Sleep Apnea, Obstructive
    Sprache Englisch
    Erscheinungsdatum 2019-04-07
    Erscheinungsland United States
    Dokumenttyp Editorial ; Comment
    ZDB-ID 1032552-9
    ISSN 1931-3543 ; 0012-3692
    ISSN (online) 1931-3543
    ISSN 0012-3692
    DOI 10.1016/j.chest.2018.10.029
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel: A comprehensive review on variants of SARS-CoVs-2: Challenges, solutions and open issues.

    Deepanshi / Budhiraja, Ishan / Garg, Deepak / Kumar, Neeraj / Sharma, Rohit

    Computer communications

    2022  Band 197, Seite(n) 34–51

    Abstract: SARS-CoV-2 is an infected disease caused by one of the variants of Coronavirus which emerged in December 2019. It is declared a pandemic by WHO in March 2020. COVID-19 outbreak has put the world on a halt and is a major threat to the public health system. ...

    Abstract SARS-CoV-2 is an infected disease caused by one of the variants of Coronavirus which emerged in December 2019. It is declared a pandemic by WHO in March 2020. COVID-19 outbreak has put the world on a halt and is a major threat to the public health system. It has shattered the world with its effects on different areas as the pandemic hit the world in a number of waves with different variants and mutations. Each variant and mutation have different transmission and infection rates in the human population. More than 609 million people have tested positive and more than 6.5 million people have died due to this disease as per 14th September 2022. Despite of numerous efforts, precautions and vaccination the infection has grown rapidly in the world. In this paper, we aim to give a holistic overview of COVID-19 its variants, game theory perspective, effects on the different social and economic areas, diagnostic advancements, treatment methods. A taxonomy is made for the proper insight of the work demonstrated in the paper. Finally, we discuss the open issues associated with COVID-19 in different fields and futuristic research trends in the area. The main aim of the paper is to provide comprehensive literature that covers all the areas and provide an expert understanding of the COVID-19 techniques and potentially be further utilized to combat the outbreak of COVID-19.
    Sprache Englisch
    Erscheinungsdatum 2022-10-26
    Erscheinungsland England
    Dokumenttyp Journal Article
    ISSN 0140-3664
    ISSN 0140-3664
    DOI 10.1016/j.comcom.2022.10.013
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Insomnia in chronic obstructive pulmonary disease: breathless and sleepless.

    Budhiraja, Rohit

    Sleep medicine

    2013  Band 14, Heft 12, Seite(n) 1233–1234

    Mesh-Begriff(e) Female ; Humans ; Male ; Pulmonary Disease, Chronic Obstructive/complications ; Pulmonary Disease, Chronic Obstructive/physiopathology ; Severity of Illness Index ; Sleep/physiology ; Sleep Initiation and Maintenance Disorders/etiology ; Sleep Initiation and Maintenance Disorders/physiopathology
    Sprache Englisch
    Erscheinungsdatum 2013-12
    Erscheinungsland Netherlands
    Dokumenttyp Comment ; Editorial
    ZDB-ID 2012041-2
    ISSN 1878-5506 ; 1389-9457
    ISSN (online) 1878-5506
    ISSN 1389-9457
    DOI 10.1016/j.sleep.2013.09.015
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Buch ; Online: LSFD for Rician-Faded Cell-Free mMIMO Systems With Channel Aging and Hardware Impairments

    Chattopadhyay, Anish / Tentu, Venkatesh / Amudala, Dheeraj Naidu / Budhiraja, Rohit

    2023  

    Abstract: We study the impact of channel aging on the uplink of a cell-free massive multiple-input multiple-output system with hardware impairments. We consider a dynamic analog-to-digital converter architecture at the access points (APs), and low-resolution ... ...

    Abstract We study the impact of channel aging on the uplink of a cell-free massive multiple-input multiple-output system with hardware impairments. We consider a dynamic analog-to-digital converter architecture at the access points (APs), and low-resolution digital-to-analog converters at the user equipments (UEs). We derive a closed-form spectral efficiency expression by considering i) practical spatially-correlated Rician channels; ii) hardware impairments at the APs and the UEs; iii) channel aging; and iv) large-scale fading decoding (LSFD). We show that LSFD can effectively mitigate the detrimental effects of i) channel aging for both low and high UE velocities; and ii) inter-user interference for low-velocity UEs but not for high-velocity UEs.

    Comment: This paper is accepted for presentation in 2023 IEEE International Conference on Communications (ICC): Wireless Communications Symposium (IEEE ICC'23 - WC Symposium), 6 pages and 4 figures
    Schlagwörter Computer Science - Information Theory ; Electrical Engineering and Systems Science - Signal Processing
    Thema/Rubrik (Code) 003
    Erscheinungsdatum 2023-02-21
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  10. Artikel ; Online: Measurement of the severity of sleep-disordered breathing: a moving target.

    Javaheri, Sogol / Budhiraja, Rohit / Quan, Stuart F

    Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

    2020  Band 16, Heft 2, Seite(n) 337–338

    Mesh-Begriff(e) Humans ; Hypertension ; Polysomnography ; Sleep ; Sleep Apnea Syndromes
    Sprache Englisch
    Erscheinungsdatum 2020-01-13
    Erscheinungsland United States
    Dokumenttyp Letter ; Comment
    ZDB-ID 2397213-0
    ISSN 1550-9397 ; 1550-9389
    ISSN (online) 1550-9397
    ISSN 1550-9389
    DOI 10.5664/jcsm.8200
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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