Outcome measures were
global functional score, calculated by summing the scores
(0-3) of each symptom (congestion, rhinorrhea, anosmia,
hyperreactivity, and pain); global anatomical score
(GAS), calculated by summing the score of polyp development
for each nasal cavity; computed tomography score;
adherence to corticosteroid therapy; oral corticosteroid
consumption; and complication and subsequent operation
rate. Efficacy was evaluated by comparing these data
preoperatively and postoperatively (at 3 months, 1 year,
and 3 years).