The success of Uvulopalatopharyngoplasty (UPPP) for Obstructive Sleep Apnea (OSA) can be assessed by a variety of parameters including clinical evaluation and polysomnography (PSG). Patients are often reluctant to undergo post-operative testing and insurance companies are often unwilling to reimburse for expensive overnight sleep studies. Due to the reality of these medical and economical problems, can a clinician be confident of the success of UPPP based solely on clinical evaluation? Sixty patients underwent UPPP for the treatment of OSA from July 1987 through June 1992. Patients treated with tracheostomy or other methods were not included in this study. Fifty-three patients (88%) reported an improvement in their symptoms of snoring, daytime somnolence, morning headache and apnea. Twenty-one patients (35%) had post-operative PSG. Eighteen of 21 patients (85%) reported improvement in their symptoms. Eleven of 21 patients (57%) showed objective improvement in their sleep apnea. The objective findings of PSG do not correlate, in a significant number of patients, with subjective clinical improvement of patients treated with UPPP.