
Predictability of STOP-Bang Questionnaire and Epworth Sleepiness Scale in Identifying Obstructive Sleep Apnoea against Polysomnography: A Cross-sectional Study
OC11-OC14
Correspondence
Dr. Dipanshu Jain,
Room No 133, Postgraduate Hostel-2, New Medical College, Rangbari, Kota,
Rajasthan, India.
E-mail: ashishranjan89@gmail.com
Introduction: Rising morbidty resulting from Obstructive Sleep Apnoea (OSA) is an emerging public health concern. The estimated prevalence of OSA in India has been investigated to be between 2.4% to 4.96% in males and 1% to 2% in females. {Snoring, Tiredness, Observed apnoea, high blood Pressure (STOP)-Body Mass Index (BMI), Age, Neck circumference, and Gender (BANG)} and Epworth Sleepiness Scale (ESS) have proven beneficial in identifying sleep breathing disorder. Validity of these questionnaire has been verified against polysomnography in many studies.
Aim: To assess the predictive ability of STOP-Bang questionnaire and ESS in identifying OSA and comparing their efficacy with Polysomnography (PSG).
Materials and Methods: The cross-sectional study was conducted in the Department of Respiratory Medicine, Government Medical College, Kota, Rajasthan, India, from January 2020 to June 2021, among 100 patients with symptoms of OSA. Both questionnaires {STOP-Bang Questionnaires (SBQ), and ESS} were completed in consecutive order, on the same day when consent was provided. Type 2 polysomnography was done for all the patients. The normality of data was tested by Shapiro Wilk’s test. The data obtained was statistically analysed and to compare the parameters between the group one-way Analysis of Variance (ANOVA) followed by Tukey’s Honestly Significant Difference (HSD) was used and for intragroup
Paired t-test was used.
Results: Mean age of the study population was 49.46±6.523 years, 79 were males and 21 females. Among the 100, 65% had OSA as per polysomnography. STOP-Bang questionnaire had a higher sensitivity as compared to ESS in predicting OSA (75.38% for STOP-Bang and 72.31% for ESS). Conversely, the specificity of ESS (82.8%) was found to be greater than STOP-Bang (45.71%). Similar results were obtained for positive predictive value, in which ESS scored 88.6% while STOP-Bang scored 50%. For negative predictive values, ESS again scored higher (65%) than STOP-Bang (61.7%). Similarly, the Likelihood Ratio for a positive result (LR+) of ESS was greater than STOP-Bang (4.2 and 1.3, respectively). The STOP-Bang questionnaire, however, had higher Likelihood Ratio for a negative test (LR-) as compared to ESS (0.5 and 0.3, respectively).
Conclusion: Polysomnography is the gold standard to diagnose OSA. For screening OSA, patients with symptoms of sleep disordered breathing, this study found that STOP-Bang questionnaire is better in identifying OSA as compared to ESS.