Derivation and validation of a clinical prediction rule for sleep apnoea syndrome for use in primary care.

Background: Several clinical prediction rules (CPRs) are available for sleep apnoea-hypopnoea syndrome (OSAH), but they are difficult to apply in primary care (PC).

Aim: Derivation and validation of a CPR using simple measurements available in PC.

Design & Setting: A prospective study conducted in health centres from the area of influence of three Spanish hospitals.