Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
UNKNOWN
11000 participants
OBSERVATIONAL
2009-05-31
2019-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
In the first surgeon questionnaire age, sex, social security number and indication for surgery (upper airway obstruction, recurrent tonsillitis, chronic tonsillitis, peritonsillar abscess, and systemic complications because of tonsillitis or other) are recorded. This is filled in when surgery is notified.
The second surgeon questionnaire records surgical method (TE, TEA, TT or TTA), surgical instruments used for dissection (cold steel, radiofrequency, diathermy scissors, ultracision or other) and hemostasis method used (injection with epinephrine, unipolar diathermy, bipolar diathermy, ties, suture ligature, radiofrequency, other or "none other than compression with packs"). The questionnaire also records information regarding daycare/inpatient procedure and primary postoperative bleeding. Due to the configuration of the questionnaires and the ambition to cover both inpatient and daycare procedures, primary bleeding is defined as bleeding during hospitalization.
The first patient/caregiver form contains several questions mainly regarding postoperative complications. Any contact with healthcare provider due to postoperative bleeding/pain/infection as well as consequences of the contact; prescribed antibiotics and readmission/return to theatre are reported. Conformity between preoperative information and actual patient experience was is also included in this form.
The final questionnaire that is sent to the second patient/caregiver questionnaire asks for perceived symptom relief after 180 days by choosing one alternative of four statements: My symptoms are gone / My symptoms are almost gone / My symptoms have not disappeared/ My symptoms have worsened.
In order to assess coverage for the NTSRS, data has been matched on an individual level with another national register, the National Patient Register (NPR). The NPR is managed by the National Board of Health and Welfare and registration of surgical procedures is mandatory by law for all physicians in Sweden. The coverage of NTSRS for the study period 2012-2014 was 75%, 81.4% and 80.7% respectively
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
COHORT
PROSPECTIVE
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
tonsil surgery with or without concomitant adenoidectomy
tonsillectomy, tonsillectomy with adenoidectomy, tonsillotomy, tonsillectomy with adenoidectomy
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
Exclusion Criteria
ALL
Yes
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
Swedish Association of Local Authorities and Regions
OTHER
Sahlgrenska University Hospital
OTHER
Karolinska Institutet
OTHER
Linkoeping University
OTHER_GOV
Region Örebro County
OTHER
Joacim Stalfors
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Joacim Stalfors
Register Director
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Joacim Stalfors, MD, PhD
Role: STUDY_DIRECTOR
Sahlgrenska Academy
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
National Tonsil Surgery Register in Sweden
Gothenburg, , Sweden
Countries
Review the countries where the study has at least one active or historical site.
Central Contacts
Reach out to these primary contacts for questions about participation or study logistics.
Facility Contacts
Find local site contact details for specific facilities participating in the trial.
Lisa Hellgård, MSc
Role: primary
References
Explore related publications, articles, or registry entries linked to this study.
Odhagen E, Sunnergren O, Hemlin C, Hessen Soderman AC, Ericsson E, Stalfors J. Risk of reoperation after tonsillotomy versus tonsillectomy: a population-based cohort study. Eur Arch Otorhinolaryngol. 2016 Oct;273(10):3263-8. doi: 10.1007/s00405-015-3871-7. Epub 2016 Jan 4.
Gerhardsson H, Stalfors J, Odhagen E, Sunnergren O. Pediatric adenoid surgery in Sweden 2004-2013: Incidence, indications and concomitant surgical procedures. Int J Pediatr Otorhinolaryngol. 2016 Aug;87:61-6. doi: 10.1016/j.ijporl.2016.05.020. Epub 2016 May 20.
Ostvoll E, Sunnergren O, Ericsson E, Hemlin C, Hultcrantz E, Odhagen E, Stalfors J. Mortality after tonsil surgery, a population study, covering eight years and 82,527 operations in Sweden. Eur Arch Otorhinolaryngol. 2015 Mar;272(3):737-43. doi: 10.1007/s00405-014-3312-z. Epub 2014 Oct 2.
Ostvoll E, Sunnergren O, Stalfors J. Increasing Readmission Rates for Hemorrhage after Tonsil Surgery: A Longitudinal (26 Years) National Study. Otolaryngol Head Neck Surg. 2018 Jan;158(1):167-176. doi: 10.1177/0194599817725680. Epub 2017 Aug 22.
Sunnergren O, Odhagen E, Stalfors J. Incidence of second surgery following pediatric adenotonsillar surgery: a population-based cohort study. Eur Arch Otorhinolaryngol. 2017 Jul;274(7):2945-2951. doi: 10.1007/s00405-017-4543-6. Epub 2017 Mar 23.
Borgstrom A, Nerfeldt P, Friberg D, Sunnergren O, Stalfors J. Trends and changes in paediatric tonsil surgery in Sweden 1987-2013: a population-based cohort study. BMJ Open. 2017 Jan 13;7(1):e013346. doi: 10.1136/bmjopen-2016-013346.
Elinder K, Soderman AC, Stalfors J, Knutsson J. Factors influencing morbidity after paediatric tonsillectomy: a study of 18,712 patients in the National Tonsil Surgery Register in Sweden. Eur Arch Otorhinolaryngol. 2016 Aug;273(8):2249-56. doi: 10.1007/s00405-016-4001-x. Epub 2016 Mar 28.
Soderman AC, Odhagen E, Ericsson E, Hemlin C, Hultcrantz E, Sunnergren O, Stalfors J. Post-tonsillectomy haemorrhage rates are related to technique for dissection and for haemostasis. An analysis of 15734 patients in the National Tonsil Surgery Register in Sweden. Clin Otolaryngol. 2015 Jun;40(3):248-54. doi: 10.1111/coa.12361.
Sunnergren O, Hemlin C, Ericsson E, Hessen-Soderman AC, Hultcrantz E, Odhagen E, Stalfors J. Radiofrequency tonsillotomy in Sweden 2009-2012. Eur Arch Otorhinolaryngol. 2014 Jun;271(6):1823-7. doi: 10.1007/s00405-013-2867-4. Epub 2013 Dec 24.
Hultcrantz E, Ericsson E, Hemlin C, Hessen-Soderman AC, Roos K, Sunnergren O, Stalfors J. Paradigm shift in Sweden from tonsillectomy to tonsillotomy for children with upper airway obstructive symptoms due to tonsillar hypertrophy. Eur Arch Otorhinolaryngol. 2013 Sep;270(9):2531-6. doi: 10.1007/s00405-013-2374-7. Epub 2013 Feb 6.
Stalfors J, Ericsson E, Hemlin C, Hultcrantz E, Mansson I, Roos K, Hessen Soderman AC. Tonsil surgery efficiently relieves symptoms: analysis of 54 696 patients in the National Tonsil Surgery Register in Sweden. Acta Otolaryngol. 2012 May;132(5):533-9. doi: 10.3109/00016489.2011.644252. Epub 2012 Jan 11.
Hessen Soderman AC, Ericsson E, Hemlin C, Hultcrantz E, Mansson I, Roos K, Stalfors J. Reduced risk of primary postoperative hemorrhage after tonsil surgery in Sweden: results from the National Tonsil Surgery Register in Sweden covering more than 10 years and 54,696 operations. Laryngoscope. 2011 Nov;121(11):2322-6. doi: 10.1002/lary.22179. Epub 2011 Oct 12.
Odhagen E, Sunnergren O, Soderman AH, Thor J, Stalfors J. Reducing post-tonsillectomy haemorrhage rates through a quality improvement project using a Swedish National quality register: a case study. Eur Arch Otorhinolaryngol. 2018 Jun;275(6):1631-1639. doi: 10.1007/s00405-018-4942-3. Epub 2018 Mar 24.
Alm F, Stalfors J, Nerfeldt P, Ericsson E. Patient reported pain-related outcome measures after tonsil surgery: an analysis of 32,225 children from the National Tonsil Surgery Register in Sweden 2009-2016. Eur Arch Otorhinolaryngol. 2017 Oct;274(10):3711-3722. doi: 10.1007/s00405-017-4679-4. Epub 2017 Aug 16.
Hallenstal N, Sunnergren O, Ericsson E, Hemlin C, Hessen Soderman AC, Nerfeldt P, Odhagen E, Ryding M, Stalfors J. Tonsil surgery in Sweden 2013-2015. Indications, surgical methods and patient-reported outcomes from the National Tonsil Surgery Register. Acta Otolaryngol. 2017 Oct;137(10):1096-1103. doi: 10.1080/00016489.2017.1327122. Epub 2017 Jun 9.
Gudnadottir G, Tennvall GR, Stalfors J, Hellgren J. Indirect costs related to caregivers' absence from work after paediatric tonsil surgery. Eur Arch Otorhinolaryngol. 2017 Jun;274(6):2629-2636. doi: 10.1007/s00405-017-4526-7. Epub 2017 Mar 14.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
1111
Identifier Type: -
Identifier Source: org_study_id