Polysomnography-based diagnosis in Mexican adult patients with Obstructive Sleep Apnea Syndrome (OSAS) clinical suspicion.

INTRODUCTION

Obstructive sleep apnea syndrome (OSA) occurs in 2-4% of adults, increasing by 2.5 times the risk of sudden death.

OBJECTIVE

Establish the concordance of the clinical diagnostic and electrical diagnosis in an adult series that underwent polysomnography.

MATERIALS AND

METHODS

Patients with sleep disorders that underwent consecutively polysomnography recording.

RESULTS

In this study, 51 subjects from 24 to 77 years old (54.1±12.12) were included in the study; 23 males and 28 females; 78.43% were overweight or obese; 35.29% were smokers; 31.37% alcohol consumers; 47.05% hypertensive; 21% diabetics; 35.29% with airway alterations; 29.41% with depression; 13.72% dyslipidaemic and 7.84% with ischemic heart disease. Only 22 of the subjects qualified for OSA and the concordance between the clinical diagnostic and polysomnographic recording was 54% (Ko=0.60, Ke 0.50, Ka=0.20) with a 0.55 sensibility, 0.66 specificity, PPV 0.54, NPV 0.65, PLR 1.2, RVN 0.69 and PPP 0.47. The neck circumference in OSA was 40.68±5 vs. 37.7±3.5 cm. (p<0.02) and BMI was 36.48±13.16 vs 29.37±6.58 (p<0.008); male/female proportion was 1.8:1 (p<0.01), BMI was higher in OSA (p<0.002). The Epworth Sleepiness Scale did not discriminate between OSA and other sleep alteration (p<0.29).

DISCUSSION AND

CONCLUSIONS

We observed a poor agreement between clinical diagnosis and polysomnography. The Epworth Sleepiness Scale did not discern between OSA and other sleep disorders and finally there was no association with a systemic process.