Information to go into 'Characteristics of included studies' table
Methods	X arm, double/single/non‐blinded, [multicentre] parallel‐group/cross‐over/cluster‐RCT, with x duration of treatment and x duration of follow‐up
Participants	Location: country, no of sites etc. Setting of recruitment and treatment: Sample size: Number randomised: x in intervention, y in comparison Number completed: x in intervention, y in comparison Participant (baseline) characteristics: Age: Gender: Main diagnosis: [as stated in paper] Polyps status: x % with polyps/no information [add info on mean polyps score if available] Previous sinus surgery status: [x% with previous surgery] Previous courses of steroids: [add info on mean number of courses if available Other important effect modifiers, if applicable (e.g. aspirin sensitivity, comorbidities of asthma): Inclusion criteria:[state diagnostic criteria used for CRS, polyps score if available] Exclusion criteria:
Interventions	Intervention (n = x): drug name, method of administration, dose per day/frequency of administration, duration of treatment Comparator group (n = y): Use of additional interventions (common to both treatment arms):
Outcomes	Outcomes of interest in the review: Primary outcomes: Health‐related quality of life, disease‐specific Disease severity symptom score Significant adverse effects: local reaction at the injection site, including swelling, redness Secondary outcomes: Health‐related quality of life, generic Nasopharyngitis, including sore throat Endoscopy (polyps size or overall score) CT scan
Funding sources	'No information provided'/'None declared'/State source of funding
Declarations of interest	'No information provided'/'None declared'/State conflict
Notes