Primary outcome measures
STILL
For the NPS a significant interaction “group x time” (p = 0.026) was found. Still at post-hoc level the groups did not differ significantly at any time point at either the short-term or the long-term follow-up (p ≥ 0.055 if uncorrected/p ≥ 0.498 if corrected for multiple comparison). The RSDI as a sinonasal-specific patient-reported outcome measure did not differ between the two groups over time either (p=0.462) (Line plot of 