Department of Pulmonary Medicine, TN Medical College and BYL Nair Hospital, Mumbai, 400008, India
*Address for correspondence: Jyotsna M. Joshi, Department of Pulmonary Medicine, TN Medical College and BYL Nair Hospital, Mumbai-400008, India, Tel.: +91 022-23027642/43, E-mail address: drjoshijm@gmail.com
Online published on 5 August, 2017.
Obstructive sleep apnoea (OSA) is a common medical condition diagnosed by polysomnography (PSG). The long waiting timefor PSG prompted researchers to make various pre-test probability scores for triaging the need for PSG. While most scores were formulated and evaluated in preoperative cases, modified sleep apnoea clinical score (SACS), the adjusted neck circumference score (ANCS), was also assessed for pre-test probability testing in OSA. This study was undertaken to explore the role of ANCS in our clinical setting.
Retrospective analysis of 113 patients with an apnoea hypopnoea index (AHI) of more than 5/hour on PSG was performed. The age and sex distribution was studied. ANCS, SACS and ESS were reviewed and correlated with AHI. Descriptive and analytical statistical analysis was applied.
Hundred and thirteen cases of OSA consisted of 82 men and 31 women were taken. Average AHI of the study group was found to be 34.6 (22.7) per hour. Twenty-six, 34, 53 patients had mild, moderate, severe OSA, respectively. The mean AHI in the mild, moderate, and severe OSA groups were 10.87, 21.19, and 54.21 per hour, respectively. Mean ANCS and SACS were found to be 47.8 (4.7) and 17.8 (12.9), respectively. ANCS of 43 or more could identify 89.3% of cases while SACS was positive (>8) in only 76%. ANCS severity did not correlate with the severity of OSA. Screening patients with ANCS and ESS (>10) could identify all cases of moderate to severe OSA.
It is proposedthat ANCS in adjunct with ESS has the potential to be a simple screening tool for OSA.
Polysomnography, Pre-test probability scores, Apnoea hypopnoea index (AHI), Adjusted neck circumference score
