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Apnea, Bariatric surgery, and CPAP study


A randomized controlled trial comparing effectiveness of bariatric surgery and CPAP


49 adults with class II obesity and severe obstructive sleep apnea


2011-2014, subjects had a baseline and follow-up visits at 9- and 18-months


National Institutes of Health


The Apnea, Bariatric surgery, and CPAP (ABC) study aimed to assess the role of bariatric (weight loss) surgery as compared to continuous positive airway pressure (CPAP) therapy plus weight loss counseling for the treatment of patients with class II obesity and those who have severe obstructive sleep apnea (OSA).

Read more about ABC at ClinicalTrials.gov (NCT01187771).

Citation and acknowledgement

When using this dataset, please cite the following:

Zhang GQ, Cui L, Mueller R, Tao S, Kim M, Rueschman M, Mariani S, Mobley D, Redline S. The National Sleep Research Resource: towards a sleep data commons. J Am Med Inform Assoc. 2018 Oct 1;25(10):1351-1358. doi: 10.1093/jamia/ocy064. PMID: 29860441; PMCID: PMC6188513.

Bakker JP, Tavakkoli A, Rueschman M, Wang W, Andrews R, Malhotra A, Owens RL, Anand A, Dudley KA, Patel SR. Gastric Banding Surgery versus Continuous Positive Airway Pressure for Obstructive Sleep Apnea: A Randomized Controlled Trial. Am J Respir Crit Care Med. 2018 Apr 15;197(8):1080-1083. doi: 10.1164/rccm.201708-1637LE. PMID: 29035093; PMCID: PMC5909166.

Please include the following text in the Acknowledgements:

The Apnea, Bariatric surgery, and CPAP study (ABC Study) was supported by National Institutes of Health grants R01HL106410 and K24HL127307. Philips Respironics donated the CPAP machines and supplies used in the perioperative period for patients undergoing bariatric surgery. The National Sleep Research Resource was supported by the National Heart, Lung, and Blood Institute (R24 HL114473, 75N92019R002).

Data overview

/datasets (introduction)
Core data from baseline and follow-up (9- and 18-Month) visits.

/polysomnography (introduction)
Overnight polysomnography (PSG) data from baseline and follow-up (9- and 18-Month) visits.

Protocols and manuals


Recent Changes

National Sleep Research Resource
Apnea, Bariatric surgery, and CPAP study