Undiagnosed obstructive sleep apnea as a predictor of 30-day readmission for brain tumor patients

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OBJECTIVE

Obstructive sleep apnea (OSA) is known to be associated with negative outcomes and is underdiagnosed. The STOP-Bang questionnaire is a screening tool for OSA that has been validated in both medical and surgical populations. Given that readmission after surgical intervention is an undesirable event, the authors sought to investigate, among patients not previously diagnosed with OSA, the capacity of the STOP-Bang questionnaire to predict 30-day readmissions following craniotomy for a supratentorial neoplasm.

METHODS

For patients undergoing craniotomy for treatment of a supratentorial neoplasm within a multiple-hospital academic medical center, data were captured in a prospective manner via the Neurosurgery Quality Improvement Initiative (NQII) EpiLog tool. Data were collected over a 1-year period for all supratentorial craniotomy cases. An additional criterion for study inclusion was that the patient was alive at 30 postoperative days. Statistical analysis consisted of simple logistic regression, which assessed the ability of the STOP-Bang questionnaire and additional variables to effectively predict outcomes such as 30-day readmission, 30-day emergency department (ED) visit, and 30-day reoperation. The C-statistic was used to represent the receiver operating characteristic (ROC) curve, which analyzes the discrimination of a variable or model.

RESULTS

Included in the sample were all admissions for supratentorial neoplasms treated with craniotomy (352 patients), 49.72% (n = 175) of which were female. The average STOP-Bang score was 1.91 ± 1.22 (range 0–7). A 1-unit higher STOP-Bang score accurately predicted 30-day readmissions (OR 1.31, p = 0.017) and 30-day ED visits (OR 1.36, p = 0.016) with fair accuracy as confirmed by the ROC curve (C-statistic 0.60–0.61). The STOP-Bang questionnaire did not correlate with 30-day reoperation (p = 0.805) or home discharge (p = 0.315).

CONCLUSIONS

The results of this study suggest that undiagnosed OSA, as assessed via the STOP-Bang questionnaire, is a significant predictor of patient health status and readmission risk in the brain tumor craniotomy population. Further investigations should be undertaken to apply this prediction tool in order to enhance postoperative patient care to reduce the need for unplanned readmissions.

ABBREVIATIONS ASA = American Society of Anesthesiologists; CCI = Charlson Comorbidity Index; CPAP = continuous positive airway pressure; ED = emergency department; LOS = length of stay; MOT = mean operative time; NQII = Neurosurgery Quality Improvement Initiative; OSA = obstructive sleep apnea; RAPT = Risk Assessment and Prediction Tool; ROC = receiver operating characteristic.

Article Information

Correspondence Neil R. Malhotra: Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. nrm@uphs.upenn.edu.

INCLUDE WHEN CITING Published online July 19, 2019; DOI: 10.3171/2019.4.JNS1968.

Disclosures This work was supported by the Bernadette and Kevin McKenna Family Research Fund.

© AANS, except where prohibited by US copyright law.

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