Utility of A Type Ⅲ Portable Monitor for Diagnosis of OSA
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摘要
Study Objectives:This study aims to compare NOX T3 study at-home to in-lab polysomnogram and simultaneous NOX T3 study.Secondly,we aim to compare the diagnostic accuracy of the NOX T3 portable sleep monitor to that of simultaneously recorded in-lab polysomnogram(PSG) in adults being evaluated for obstructive sleep apnea(OSA).Methods:A total of 81 participants were recruited following face-to-face evaluation at PKU People's hospital'ssleep center.All participants initially performed an overnight HST using the Nox-T3 portable monitor.Within 2 weeks of the HST,participants performed an in-laboratory PSG with a simultaneous Nox-T3 portable monitor recording.PSG records were manually scored using the American Academy of Sleep Medicine(AASM) criteria,and PM records were double-scored using the device's autoscore algorithm as well as manual scoring.Two separate manually edited scorings were performed using different definitions for hypopnea in both HST and PSG,1) events with ≥ 30%reduction in airflow from baseline for≥ 10 seconds accompanied by ≥4%oxygen desaturation,and2)events with ≥30%reduction in airflow from baseline for ≥10 seconds associated with≥3%reduction in oxygen saturation and/(or an arousal in PSG).The ability of subjects to perform HST was assessed as the percentage of successful HST on first and second recording attempts and HST quality.Results:The final sample consisted of 81 participants(63 males,18 females) with a mean ± SD age,ESS,BMI,of 47.65±13.98,10.28±5.11,27.55±5.45Kg/m~2.Successful rate for 1~(st) HST and 2~(nd) NOX study in lab was 93.75%(75/80),95%(76/80).No one failed in second time's home study when the first time of HST failed.And average apnea-hypopnea index ±SD(AHI 3%oxygen desaturation for hypopnea) in 1~(st) NOX,2~(nd) NOX and PSGwas 28.54±20.35/h,32.54±22.39/h,33.51±23.2/h.Manual score-derived T3 AHI(3%) and PSG-derived AHI(3%) were strongly related(r=.92).The T3(manualscored AHI) demonstrated a high degree of sensitivity for the presence of obstructive sleep apnea syndrome(OSA;100%) and highspecificity for the diagnosis of OSA when AHI≥5 events/h(93.15%).The unit(manualscored) had a high degree of both sensitivity(95.83%) and specificity(83.3%) when the presence of OSA was defined more conservatively(AHI > 15 events/h).The unit(manualscored) had a high degree of both sensitivity(97.56%) and specificity(86.49%) when the presence of severe OSA was defined as AHI >30 events/h.Conclusions:ln this clinic-based sample,this type Ⅲ portable monitor demonstrated to be easy for patients to complete the HST.And it is very good measurement agreement compared to PSG and a high degree of sensitivity and specificity for detecting OSA including mild,moderate and severe OSA.
Study Objectives:This study aims to compare NOX T3 study at-home to in-lab polysomnogram and simultaneous NOX T3 study.Secondly,we aim to compare the diagnostic accuracy of the NOX T3 portable sleep monitor to that of simultaneously recorded in-lab polysomnogram(PSG) in adults being evaluated for obstructive sleep apnea(OSA).Methods:A total of 81 participants were recruited following face-to-face evaluation at PKU People's hospital'ssleep center.All participants initially performed an overnight HST using the Nox-T3 portable monitor.Within 2 weeks of the HST,participants performed an in-laboratory PSG with a simultaneous Nox-T3 portable monitor recording.PSG records were manually scored using the American Academy of Sleep Medicine(AASM) criteria,and PM records were double-scored using the device's autoscore algorithm as well as manual scoring.Two separate manually edited scorings were performed using different definitions for hypopnea in both HST and PSG,1) events with ≥ 30%reduction in airflow from baseline for≥ 10 seconds accompanied by ≥4%oxygen desaturation,and2)events with ≥30%reduction in airflow from baseline for ≥10 seconds associated with≥3%reduction in oxygen saturation and/(or an arousal in PSG).The ability of subjects to perform HST was assessed as the percentage of successful HST on first and second recording attempts and HST quality.Results:The final sample consisted of 81 participants(63 males,18 females) with a mean ± SD age,ESS,BMI,of 47.65±13.98,10.28±5.11,27.55±5.45Kg/m~2.Successful rate for 1~(st) HST and 2~(nd) NOX study in lab was 93.75%(75/80),95%(76/80).No one failed in second time's home study when the first time of HST failed.And average apnea-hypopnea index ±SD(AHI 3%oxygen desaturation for hypopnea) in 1~(st) NOX,2~(nd) NOX and PSGwas 28.54±20.35/h,32.54±22.39/h,33.51±23.2/h.Manual score-derived T3 AHI(3%) and PSG-derived AHI(3%) were strongly related(r=.92).The T3(manualscored AHI) demonstrated a high degree of sensitivity for the presence of obstructive sleep apnea syndrome(OSA;100%) and highspecificity for the diagnosis of OSA when AHI≥5 events/h(93.15%).The unit(manualscored) had a high degree of both sensitivity(95.83%) and specificity(83.3%) when the presence of OSA was defined more conservatively(AHI > 15 events/h).The unit(manualscored) had a high degree of both sensitivity(97.56%) and specificity(86.49%) when the presence of severe OSA was defined as AHI >30 events/h.Conclusions:ln this clinic-based sample,this type Ⅲ portable monitor demonstrated to be easy for patients to complete the HST.And it is very good measurement agreement compared to PSG and a high degree of sensitivity and specificity for detecting OSA including mild,moderate and severe OSA.
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