Compare two surgical interventions for otitis media with effusion in young children

Factors related to the surgical outcomes of type I tympanoplasty for tympanic membrane perforation in children

BACKGROUND

Factors related to surgical outcomes of type I tympanoplasty for tympanic membrane (TM) perforation in children are controversial.

OBJECTIVES

To investigate factors related to anatomical results of type I tympanoplasty for TM perforation 1 year after surgery.

MATERIAL AND METHODS

We examined 68 ears. Anatomical results were determined based on the presence or absence of re-perforation, atelectasis, and otitis media with effusion. We retrospectively analyzed factors based on age (≤8 and >8 years), cause and size of TM perforation (<50% and ≥50%), history of asthma and cleft palate, and size of mastoid air cell system in bilateral ears before tympanoplasty. Audiological prognosis was evaluated in ears with anatomical success 1 year after surgery.

RESULTS

Anatomical success was achieved in 80.9% (55/68) of the ears. No significant differences were observed between these factors and anatomical results. All children with cleft palate had anatomical success. Mean pure-tone average (0.5-4 kHz) was 16.25 dB HL for ears with both TM perforations <50% and ≥50%.

CONCLUSION AND SIGNIFICANCE

We observed no significant relationship between factors considered and surgical outcomes. However, audiological prognosis was favorable for anatomical success regardless of TM perforation size. Accordingly, type I tympanoplasty is considered useful for TM perforation in children.

Ventilation tubes (grommets) for otitis media with effusion (OME) in children

BACKGROUND

Otitis media with effusion (OME) is an accumulation of fluid in the middle ear cavity, common amongst young children. It may cause hearing loss which, when persistent, may lead to developmental delay, social difficulty and poor quality of life. Management includes watchful waiting, autoinflation, medical and surgical treatment. Insertion of ventilation tubes has often been used as the preferred treatment.

OBJECTIVES

To evaluate the effects (benefits and harms) of ventilation tubes (grommets) for OME in children.

SEARCH METHODS

We searched the Cochrane ENT Register, CENTRAL, Ovid MEDLINE, Ovid Embase, Web of Science, ClinicalTrials.gov, ICTRP and additional sources for published and unpublished trials on 20 January 2023.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) and quasi-RCTs in children (6 months to 12 years) with OME for ≥ 3 months. We included studies that compared ventilation tube (VT) insertion with five comparators: no treatment, watchful waiting (ventilation tubes inserted later, if required), myringotomy, hearing aids and other non-surgical treatments.

DATA COLLECTION AND ANALYSIS

We used standard Cochrane methods. Our primary outcomes were determined following a multi-stakeholder prioritisation exercise and were: 1) hearing; 2) OME-specific quality of life; 3) persistent tympanic membrane perforation (as a severe adverse effect of the surgery). Secondary outcomes were: 1) persistence of OME; 2) other adverse effects (including tympanosclerosis, VT blockage and pain); 3) receptive language skills; 4) speech development; 5) cognitive development; 6) psychosocial skills; 7) listening skills; 8) generic health-related quality of life; 9) parental stress; 10) vestibular function; 11) episodes of acute otitis media. We used GRADE to assess the certainty of evidence for key outcomes. Although we included all measures of hearing assessment, the proportion of children who returned to normal hearing was our preferred method, due to challenges in interpreting the results of mean hearing thresholds.

MAIN RESULTS

We included 19 RCTs (2888 children). We considered most of the evidence to be very uncertain, due to wide confidence intervals for the effect estimates, few participants, and a risk of performance and detection bias. Here we report our key outcomes at the longest reported follow-up. There were some limitations to the evidence. No studies investigated the comparison of ventilation tubes versus hearing aids. We did not identify any data on disease-specific quality of life; however, many studies were conducted before the development of specific tools to assess this in otitis media. Short-acting ventilation tubes were used in most studies and thus specific data on the use of long-acting VTs is limited. Finally, we did not identify specific data on the effects of VTs in children at increased risk of OME (e.g. with craniofacial syndromes). Ventilation tubes versus no treatment (four studies) The odds ratio (OR) for a return to normal hearing after 12 months was 1.13 with VTs (95% confidence interval (CI) 0.46 to 2.74; 54% versus 51%; 1 study, 72 participants; very low-certainty evidence). At six months, VTs may lead to a large reduction in persistent OME (risk ratio (RR) 0.30, 95% CI 0.14 to 0.65; 20.4% versus 68.0%; 1 study, 54 participants; low-certainty evidence). The evidence is very uncertain about the chance of persistent tympanic membrane perforation with VTs at 12 months (OR 0.85, 95% CI 0.38 to 1.91; 8.3% versus 9.7%; 1 RCT, 144 participants). Early ventilation tubes versus watchful waiting (six studies) There was little to no difference in the proportion of children whose hearing returned to normal after 8 to 10 years (i.e. by the age of 9 to 13 years) (RR for VTs 0.98, 95% CI 0.94 to 1.03; 93% versus 95%; 1 study, 391 participants; very low-certainty evidence). VTs may also result in little to no difference in the risk of persistent OME after 18 months to 6 years (RR 1.21, 95% CI 0.84 to 1.74; 15% versus 12%; 3 studies, 584 participants; very low-certainty evidence). We were unable to pool data on persistent perforation. One study showed that VTs may increase the risk of perforation after a follow-up duration of 3.75 years (RR 3.65, 95% CI 0.41 to 32.38; 1 study, 391 participants; very low-certainty evidence) but the actual number of children who develop persistent perforation may be low, as demonstrated by another study (1.26%; 1 study, 635 ears; very low-certainty evidence). Ventilation tubes versus non-surgical treatment (one study) One study compared VTs to six months of antibiotics (sulphisoxazole). No data were available on return to normal hearing, but final hearing thresholds were reported. At four months, the mean difference was -5.98 dB HL lower (better) for those receiving VTs, but the evidence is very uncertain (95% CI -9.21 to -2.75; 1 study, 125 participants; very low-certainty evidence). No evidence was identified regarding persistent OME. VTs may result in a low risk of persistent perforation at 18 months of follow-up (no events reported; narrative synthesis of 1 study, 60 participants; low-certainty evidence). Ventilation tubes versus myringotomy (nine studies) We are uncertain whether VTs may slightly increase the likelihood of returning to normal hearing at 6 to 12 months, since the confidence intervals were wide and included the possibility of no effect (RR 1.22, 95% CI 0.59 to 2.53; 74% versus 64%; 2 studies, 132 participants; very low-certainty evidence). After six months, persistent OME may be reduced for those who receive VTs compared to laser myringotomy, but the evidence is very uncertain (OR 0.27, 95% CI 0.19 to 0.38; 1 study, 272 participants; very low-certainty evidence). At six months, the risk of persistent perforation is probably similar with the use of VTs or laser myringotomy (narrative synthesis of 6 studies, 581 participants; moderate-certainty evidence).

AUTHORS' CONCLUSIONS

There may be small short- and medium-term improvements in hearing and persistence of OME with VTs, but it is unclear whether these persist after longer follow-up. The RCTs included do not allow us to say when (or how much) VTs improve hearing in any specific child. However, interpretation of the evidence is difficult: many children in the control groups recover spontaneously or receive VTs during follow-up, VTs may block or extrude, and OME may recur. The limited evidence in this review also affects the generalisability/applicability of our findings to situations involving children with underlying conditions (e.g. craniofacial syndromes) or the use of long-acting tubes. Consequently, RCTs may not be the best way to determine whether an intervention is likely to be effective in any individual child. Instead, we must better understand the different OME phenotypes to target interventions to children who will benefit most, and avoid over-treating when spontaneous resolution is likely.

Adenoidectomy for otitis media with effusion (OME) in children

BACKGROUND

Otitis media with effusion (OME) is an accumulation of fluid in the middle ear cavity, common amongst young children. The fluid may cause hearing loss. When persistent, it may lead to developmental delay, social difficulty and poor quality of life. Management of OME includes watchful waiting, autoinflation, medical and surgical treatment. Adenoidectomy has often been used as a potential treatment for this condition.

OBJECTIVES

To assess the benefits and harms of adenoidectomy, either alone or in combination with ventilation tubes (grommets), for OME in children.

SEARCH METHODS

The Cochrane ENT Information Specialist searched the Cochrane ENT Register; Central Register of Controlled Trials (CENTRAL); Ovid MEDLINE; Ovid Embase; Web of Science; ClinicalTrials.gov; ICTRP and additional sources for published and unpublished trials. The date of the search was 20 January 2023.

SELECTION CRITERIA

Randomised controlled trials and quasi-randomised trials in children aged 6 months to 12 years with unilateral or bilateral OME. We included studies that compared adenoidectomy (alone, or in combination with ventilation tubes) with either no treatment or non-surgical treatment.

DATA COLLECTION AND ANALYSIS

We used standard Cochrane methods. Primary outcomes (determined following a multi-stakeholder prioritisation exercise): 1) hearing, 2) otitis media-specific quality of life, 3) haemorrhage.

SECONDARY OUTCOMES

1) persistence of OME, 2) adverse effects, 3) receptive language skills, 4) speech development, 5) cognitive development, 6) psychosocial skills, 7) listening skills, 8) generic health-related quality of life, 9) parental stress, 10) vestibular function, 11) episodes of acute otitis media. We used GRADE to assess the certainty of evidence for each outcome. Although we included all measures of hearing assessment, the proportion of children who returned to normal hearing was our preferred method to assess hearing, due to challenges in interpreting the results of mean hearing thresholds.

MAIN RESULTS

We included 10 studies (1785 children). Many of the studies used concomitant interventions for all participants, including insertion of ventilation tubes or myringotomy. All included studies had at least some concerns regarding the risk of bias. We report results for our main outcome measures at the longest available follow-up. We did not identify any data on disease-specific quality of life for any of the comparisons. Further details of additional outcomes and time points are reported in the review. 1) Adenoidectomy (with or without myringotomy) versus no treatment/watchful waiting (three studies) After 12 months there was little difference in the proportion of children whose hearing had returned to normal, but the evidence was very uncertain (adenoidectomy 68%, no treatment 70%; risk ratio (RR) 0.97, 95% confidence interval (CI) 0.65 to 1.46; number needed to treat to benefit (NNTB) 50; 1 study, 42 participants). There is a risk of haemorrhage from adenoidectomy, but the absolute risk appears small (1/251 receiving adenoidectomy compared to 0/229, Peto odds ratio (OR) 6.77, 95% CI 0.13 to 342.54; 1 study, 480 participants; moderate certainty evidence). The risk of persistent OME may be slightly lower after two years in those receiving adenoidectomy (65% versus 73%), but again the difference was small (RR 0.90, 95% CI 0.81 to 1.00; NNTB 13; 3 studies, 354 participants; very low-certainty evidence). 2) Adenoidectomy (with or without myringotomy) versus non-surgical treatment No studies were identified for this comparison. 3) Adenoidectomy and bilateral ventilation tubes versus bilateral ventilation tubes (four studies) There was a slight increase in the proportion of ears with a return to normal hearing after six to nine months (57% adenoidectomy versus 42% without, RR 1.36, 95% CI 0.98 to 1.89; NNTB 7; 1 study, 127 participants (213 ears); very low-certainty evidence). Adenoidectomy may give an increased risk of haemorrhage, but the absolute risk appears small, and the evidence was uncertain (2/416 with adenoidectomy compared to 0/375 in the control group, Peto OR 6.68, 95% CI 0.42 to 107.18; 2 studies, 791 participants). The risk of persistent OME was similar for both groups (82% adenoidectomy and ventilation tubes compared to 85% ventilation tubes alone, RR 0.96, 95% CI 0.86 to 1.07; very low-certainty evidence). 4) Adenoidectomy and unilateral ventilation tube versus unilateral ventilation tube (two studies) Slightly more children returned to normal hearing after adenoidectomy, but the confidence intervals were wide (57% versus 46%, RR 1.24, 95% CI 0.79 to 1.96; NNTB 9; 1 study, 72 participants; very low-certainty evidence). Fewer children may have persistent OME after 12 months, but again the confidence intervals were wide (27.2% compared to 40.5%, RR 0.67, 95% CI 0.35 to 1.29; NNTB 8; 1 study, 74 participants). We did not identify any data on haemorrhage. 5) Adenoidectomy and ventilation tubes versus no treatment/watchful waiting (two studies) We did not identify data on the proportion of children who returned to normal hearing. However, after two years, the mean difference in hearing threshold for those allocated to adenoidectomy was -3.40 dB (95% CI -5.54 to -1.26; 1 study, 211 participants; very low-certainty evidence). There may be a small reduction in the proportion of children with persistent OME after two years, but the evidence was very uncertain (82% compared to 90%, RR 0.91, 95% CI 0.82 to 1.01; NNTB 13; 1 study, 232 participants). We noted that many children in the watchful waiting group had also received surgery by this time point. 6) Adenoidectomy and ventilation tubes versus non-surgical treatment No studies were identified for this comparison.

AUTHORS' CONCLUSIONS

When assessed with the GRADE approach, the evidence for adenoidectomy in children with OME is very uncertain. Adenoidectomy may reduce the persistence of OME, although evidence about the effect of this on hearing is unclear. For patients and carers, a return to normal hearing is likely to be important, but few studies measured this outcome. We did not identify any evidence on disease-specific quality of life. There were few data on adverse effects, in particular postoperative bleeding. The risk of haemorrhage appears to be small, but should be considered when choosing a treatment strategy for children with OME. Future studies should aim to determine which children are most likely to benefit from treatment, rather than offering interventions to all children.

Predictors of Otitis Media with Effusion Recurrence Following Myringotomy

Otitis media with effusion (OME) is the most common cause of acquired pediatric hearing loss. The treatment of persistent OME includes myringotomy with or without tube insertion, with a reported recurrence rate of 19.9-40%. This study aims to investigate the recurrence rate of OME and its predictors following myringotomy. A retrospective study that included 345 ears that underwent myringotomy for persistent OME in 179 pediatric patients during 2016-2018. Patients were followed for 36-48 months post myringotomy procedure to detect the recurrence rate. The study sample was divided into two groups based on recurrence status, and the groups were compared using chi-square test and independent T-test. Significant variables (p-value ≤ 0.05) were included in the logistic regression model to determine the predictors of OME recurrence after myringotomy. OME recurrence was detected in 85 ears (24.64%). The OME recurrence rate is higher in patients who underwent myringotomy alone compared to myringotomy with tube insertion (44.1% vs. 22.8%). The insertion of a tympanostomy tube decreases the recurrence rate of OME by 59.9% (OR 0.401; 95% CI 0.162-0.933). The other socio-demographic and clinical characteristics such as age, siblings, daycare attendance, passive smoking, previous acute otitis media, atopy, and adenoidectomy did not significantly influence OME recurrence (p-value > 0.05). The recurrence rate of OME following myringotomy is high. Myringotomy with tube insertion significantly decreases the recurrence rate and the need for further surgeries compared to myringotomy alone. Adenoidectomy and the patient's age have no impact on the recurrence rate of OME.

Adenoidectomy may decrease the need for a third set of tympanostomy tubes in children

OBJECTIVE

To determine whether removing or retaining adenoids at the time of placement of a second set of ear tubes impacts the need for a third set of ear tubes later in childhood.

STUDY DESIGN

Single-institution retrospective case series.

SETTING

Tertiary academic university hospital.

METHODS

We identified pediatric subjects who had undergone a second ear tube placement between 1/1/17 and 9/1/19. Subjects were stratified into two groups: 1) adenoids removed at time of second tympanostomy tube insertion (TT+A) and 2) adenoids retained at time of second tympanostomy tube insertion (TT-A). A subset of children less than age 4 was also studied independently. The primary outcome was number of patients requiring a third set of tympanostomy tubes.

RESULTS

A total of 136 subjects met inclusion and exclusion criteria. Among children less than 4 years of age (n = 99), the incidence of requiring a third set of tubes was significantly lower in the TT+A group <4 (12.8%; 6/47) compared to the TT-A group <4 (44.2%; 23/52) (p = 0.0008) with an odds ratio of 0.18 (95%CI 0.067-0.51) and number needed to treat of 3.2.

CONCLUSION

Performing adenoidectomy in children less than 4 years of age at the second tympanostomy procedure was associated with a reduced incidence of requiring a third set of ear tubes.

Clinical Practice Guideline: Tympanostomy Tubes in Children (Update)

OBJECTIVE

Insertion of tympanostomy tubes is the most common ambulatory surgery performed on children in the United States. Tympanostomy tubes are most often inserted because of persistent middle ear fluid, frequent ear infections, or ear infections that persist after antibiotic therapy. All these conditions are encompassed by the term otitis media (middle ear inflammation). This guideline update provides evidence-based recommendations for patient selection and surgical indications for managing tympanostomy tubes in children. The guideline is intended for any clinician involved in managing children aged 6 months to 12 years with tympanostomy tubes or children being considered for tympanostomy tubes in any care setting as an intervention for otitis media of any type. The target audience includes specialists, primary care clinicians, and allied health professionals.

PURPOSE

The purpose of this clinical practice guideline update is to reassess and update recommendations in the prior guideline from 2013 and to provide clinicians with trustworthy, evidence-based recommendations on patient selection and surgical indications for managing tympanostomy tubes in children. In planning the content of the updated guideline, the guideline update group (GUG) affirmed and included all the original key action statements (KASs), based on external review and GUG assessment of the original recommendations. The guideline update was supplemented with new research evidence and expanded profiles that addressed quality improvement and implementation issues. The group also discussed and prioritized the need for new recommendations based on gaps in the initial guideline or new evidence that would warrant and support KASs. The GUG further sought to bring greater coherence to the guideline recommendations by displaying relationships in a new flowchart to facilitate clinical decision making. Last, knowledge gaps were identified to guide future research.

METHODS

In developing this update, the methods outlined in the American Academy of Otolaryngology-Head and Neck Surgery Foundation's "Clinical Practice Guideline Development Manual, Third Edition: A Quality-Driven Approach for Translating Evidence Into Action" were followed explicitly. The GUG was convened with representation from the disciplines of otolaryngology-head and neck surgery, otology, pediatrics, audiology, anesthesiology, family medicine, advanced practice nursing, speech-language pathology, and consumer advocacy.

ACTION STATEMENTS

The GUG made strong recommendations for the following KASs: (14) clinicians should prescribe topical antibiotic ear drops only, without oral antibiotics, for children with uncomplicated acute tympanostomy tube otorrhea; (16) the surgeon or designee should examine the ears of a child within 3 months of tympanostomy tube insertion AND should educate families regarding the need for routine, periodic follow-up to examine the ears until the tubes extrude.The GUG made recommendations for the following KASs: (1) clinicians should not perform tympanostomy tube insertion in children with a single episode of otitis media with effusion (OME) of less than 3 months' duration, from the date of onset (if known) or from the date of diagnosis (if onset is unknown); (2) clinicians should obtain a hearing evaluation if OME persists for 3 months or longer OR prior to surgery when a child becomes a candidate for tympanostomy tube insertion; (3) clinicians should offer bilateral tympanostomy tube insertion to children with bilateral OME for 3 months or longer AND documented hearing difficulties; (5) clinicians should reevaluate, at 3- to 6-month intervals, children with chronic OME who do not receive tympanostomy tubes, until the effusion is no longer present, significant hearing loss is detected, or structural abnormalities of the tympanic membrane or middle ear are suspected; (6) clinicians should not perform tympanostomy tube insertion in children with recurrent acute otitis media who do not have middle ear effusion in either ear at the time of assessment for tube candidacy; (7) clinicians should offer bilateral tympanostomy tube insertion in children with recurrent acute otitis media who have unilateral or bilateral middle ear effusion at the time of assessment for tube candidacy; (8) clinicians should determine if a child with recurrent acute otitis media or with OME of any duration is at increased risk for speech, language, or learning problems from otitis media because of baseline sensory, physical, cognitive, or behavioral factors; (10) the clinician should not place long-term tubes as initial surgery for children who meet criteria for tube insertion unless there is a specific reason based on an anticipated need for prolonged middle ear ventilation beyond that of a short-term tube; (12) in the perioperative period, clinicians should educate caregivers of children with tympanostomy tubes regarding the expected duration of tube function, recommended follow-up schedule, and detection of complications; (13) clinicians should not routinely prescribe postoperative antibiotic ear drops after tympanostomy tube placement; (15) clinicians should not encourage routine, prophylactic water precautions (use of earplugs or headbands, avoidance of swimming or water sports) for children with tympanostomy tubes.The GUG offered the following KASs as options: (4) clinicians may perform tympanostomy tube insertion in children with unilateral or bilateral OME for 3 months or longer (chronic OME) AND symptoms that are likely attributable, all or in part, to OME that include, but are not limited to, balance (vestibular) problems, poor school performance, behavioral problems, ear discomfort, or reduced quality of life; (9) clinicians may perform tympanostomy tube insertion in at-risk children with unilateral or bilateral OME that is likely to persist as reflected by a type B (flat) tympanogram or a documented effusion for 3 months or longer; (11) clinicians may perform adenoidectomy as an adjunct to tympanostomy tube insertion for children with symptoms directly related to the adenoids (adenoid infection or nasal obstruction) OR in children aged 4 years or older to potentially reduce future incidence of recurrent otitis media or the need for repeat tube insertion.

Prognostic factors of early-onset otitis media with effusion in children treated using tympanostomy

BACKGROUND

Predicting the prognosis of early-onset otitis media with effusion (OME) in children is difficult.

OBJECTIVES

To investigate the prognostic factors of OME in children undergoing tympanostomy at 1 year of age.

MATERIAL AND METHODS

We examined 66 children (123 ears) followed up to 6 years of age. OME prognosis was determined by a history of re-tympanostomy at the last examination. We retrospectively analysed the prognostic factors based on the duration of first ventilation tube (VT) placed, history of otorrhea, asthma, adenoidectomy, and mastoid air cell system (MACS) size at 1 year before tympanostomy and at 3 years.

RESULTS

While 25 ears underwent re-tympanostomy (group 1), 98 did not (group 2). The mean duration of VT placed was 21 months and 25, and the mean MACS size at 3 years was 314 mm² and 441, respectively, in the corresponding groups. MACS size at 3 years was significantly smaller in group 1 than in group 2. The combination of MACS size at 3 years and duration of VT placed showed the best value of area under the curve.

CONCLUSION AND SIGNIFICANCE

The most probable prognostic factor was the combination of the MACS size at 3 years and duration of VT placed.

The P.E.A.N.U.T. Method: Update on an Integrative System Approach for the Treatment of Chronic Otitis Media with Effusion and Adenoid Hypertrophy in Children

BACKGROUND AND OBJECTIVES

Based on our previous single-center study on optimization of treatment of chronic otitis media with effusion (COME) and adenoid hypertrophy (AH) in children using a noninvasive system approach to lower the necessity of antibiotics, analgesic use, and surgical interventions, we proceeded to perform a multicenter investigation in an outpatient setting. The purpose of the previous prospective study in 2013-2015 was to compare outcomes in the treatment of COME and AH using the noninvasive multimodal integrative method (IM) versus conventional treatment practice (COM).

MATERIALS AND METHODS

In this paper, we retrospectively analyze the data of patients treated with the integrative method between 2017 and 2020 in a multicenter setting and compared the outcomes with data from 2013-2015 in order to evaluate generalizability. In both periods, all eligible and willing participants were included and treated with the IM protocol under real-life conditions. The treatment involved pneumatization exercises, education, an antiallergic diet, nasal hygiene, useful constitutional therapy, and thermal interventions (P.E.A.N.U.T.). A total of 48 versus 28 patients, aged 1-8, were assessed, presenting with COME and AH, with moderate to severe hearing impairment at entry.

RESULTS

The significant improvement found in both audiometric measures (intact hearing) and tympanometric measures (normal A-type curve) was similar in both datasets with respect to conventional treatment. The new data confirms that the P.E.A.N.U.T. method results in a significant reduction of antibiotics, analgesic use, and surgical interventions.

CONCLUSION

In this multicenter trial, we confirm the effectiveness of the noninvasive system approach for the treatment of COME in lowering the need for antibiotics and analgesic use and elective surgery. This could be especially important with respect to a generally observed increase in antibiotic resistance. The method is easy to perform in different clinical settings and is effective, safe, and well-tolerated.

Effects of Adenoidectomy and Adenotonsillectomy on Tympanostomy Tube Reinsertion Based on Korean Population-Based National Sample Cohort Data

OBJECTIVES

We evaluated the effects of adenoidectomy and adenotonsillectomy (AT) on tympanostomy tube (TT) reinsertion using population-based retrospective cohort data to confirm the association of adenoidectomy or AT with TT reinsertion reported in several previous studies.

MATERIALS AND METHODS

This study used data from the National Health Insurance Service National Sample Cohort in Korea. We selected patients who underwent TT insertion between the ages of 0 and 9 years from 2006 to 2015. Patients were divided into the following groups: group 1, TT insertion only; group 2, TT insertion with adenoidectomy; and group 3, TT insertion with AT. The number of TT reinsertions was analyzed.

RESULTS

There were 745 patients in group 1, 115 in group 2, and 251 in group 3. There were 1,019 cases of total TT insertion and 336 of reinsertion in group 1, 169 of total TT insertion and 31 of reinsertion in group 2, and 343 of total TT insertion and 50 of reinsertion in group 3. The rates of TT reinsertion were significantly lower in groups 2 and 3 than in group 1. The risks of TT reinsertion in groups 2 and 3 were significantly lower than the risk in group 1 in both univariate and multivariate Cox regression analysis.

CONCLUSION

TT reinsertion was significantly lower in the TT insertion with adenoidectomy and TT insertion with AT groups than in the TT insertion only group. We confirmed the effects of adenoidectomy and AT on reduction of the rate of repeated TT insertion by analysis of population-based data.