7. Secondary outcomes ‐ objective physiological measures.

Study	Intervention/comparison	Outcome measure	Timing	Outcome
Lildholdt 1988	Polypectomy versus systemic steroids	Nasal expiratory peak flow	12 months	Improved with surgical and medical treatment; no statistical difference between groups (P value > 0.05) (exact data not given)
Lildholdt 1997	Polypectomy versus systemic steroids	Peak expiratory flow rate index	12 months	Improved in all groups; no statistical difference between groups (surgical versus medical groups not reported separately, no exact data given)
Ragab 2004	Endoscopic sinus surgery plus topical steroid versus antibiotics plus high‐dose topical steroid	Total nasal volume	12 months	Improved with surgical (58.8% change from baseline, SD = 40) and medical treatment (50.3% change from baseline, SD = 50.7), P value < 0.01; no statistical difference between groups although medical group tended towards greater improvement (P value > 0.05)
Ragab 2004	Endoscopic sinus surgery plus topical steroid versus antibiotics plus high‐dose topical steroid	Nasal cross‐sectional area	12 months	No statistical difference between groups (P value > 0.05, Mann Whitney‐U test, not normally distributed data, median not reported)
Ragab 2004	Endoscopic sinus surgery plus topical steroid versus antibiotics plus high‐dose topical steroid	Nasal nitric oxide levels	12 months	No statistical difference between groups (P value > 0.05, Mann Whitney‐U test, not normally distributed data, median not reported)

SD: standard deviation