Does tonsillectomy reduce medical care visits for pharyngitis/tonsillitis in children and adults? Retrospective cohort study from Sweden

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Abstract

Objective To assess the effectiveness of tonsillectomy/adenotonsillectomy in reducing medical care visits for pharyngitis or tonsillitis in children and adults with chronic/recurrent tonsillitis. Design Retrospective cohort study. Setting Data were retrieved from the VEGA register, a comprehensive regional cohort in Sweden. Participants 1044 children (<15 years) and 2244 adults. Intervention Tonsillectomy/adenotonsillectomy compared with no surgical treatment. Main outcome measures Changes in yearly mean rates of medical care visits due to pharyngitis/tonsillitis. Results In children, there was a significant decrease in the yearly mean medical care visits rate from 1.93 (1.82 to 2.04) before surgery to 0.129 (0.099 to 0.165) after surgery, with a mean change of -1.80 (-1.90 to -1.69), p<0.0001. In patients who did not undergo surgery, the corresponding mean change was -1.51 (-1.61 to -1.41), resulting in a mean difference in the change in visit rates between the intervention and control groups of -0.283 (-0.436 to -0.135), p=0.0002. In adults, a significant decrease in the yearly mean medical care visit rate was observed from 1.45 (1.39 to 1.51) before surgery to 0.152 (0.132 to 0.173) after surgery, with a mean change of -1.30 (-1.36 to -1.24), p<0.0001, compared with -1.18 (-1.24 to -1.13) in the control group. The difference in the change in yearly mean visit rate between the surgical and non-surgical groups was -0.111 (-0.195 to -0.028), p=0.0097. The subgroup analysis showed a greater effect of surgery in children, in patients with a higher number of medical care visits before surgery and in the first year of follow-up. Conclusion In this cohort of patients moderately or less affected with chronic/recurrent tonsillitis, the effectiveness of tonsillectomy/adenotonsillectomy in reducing medical care visits for pharyngitis and tonsillitis compared with no surgical treatment was low and of questionable clinical value.

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Østvoll, E., Sunnergren, O., & Stalfors, J. (2019). Does tonsillectomy reduce medical care visits for pharyngitis/tonsillitis in children and adults? Retrospective cohort study from Sweden. BMJ Open, 9(11). https://doi.org/10.1136/bmjopen-2019-033817

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