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Comparison 1 Antihistamine versus control, Outcome 1 Secondary outcome: cure or no cure at 1‐3 months.
Figures and Tables -
Analysis 1.1

Comparison 1 Antihistamine versus control, Outcome 1 Secondary outcome: cure or no cure at 1‐3 months.

Comparison 1 Antihistamine versus control, Outcome 2 Complication: AOM.
Figures and Tables -
Analysis 1.2

Comparison 1 Antihistamine versus control, Outcome 2 Complication: AOM.

Comparison 2 Decongestant versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.
Figures and Tables -
Analysis 2.1

Comparison 2 Decongestant versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.

Comparison 2 Decongestant versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.
Figures and Tables -
Analysis 2.2

Comparison 2 Decongestant versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.

Comparison 2 Decongestant versus control, Outcome 3 Side effect: any significant side effects at or before one month.
Figures and Tables -
Analysis 2.3

Comparison 2 Decongestant versus control, Outcome 3 Side effect: any significant side effects at or before one month.

Comparison 2 Decongestant versus control, Outcome 4 Outcome: hearing on or about 1 month.
Figures and Tables -
Analysis 2.4

Comparison 2 Decongestant versus control, Outcome 4 Outcome: hearing on or about 1 month.

Comparison 2 Decongestant versus control, Outcome 5 Outcome: surgery (tympanostomy (myringotomy)).
Figures and Tables -
Analysis 2.5

Comparison 2 Decongestant versus control, Outcome 5 Outcome: surgery (tympanostomy (myringotomy)).

Comparison 2 Decongestant versus control, Outcome 6 Complication: AOM.
Figures and Tables -
Analysis 2.6

Comparison 2 Decongestant versus control, Outcome 6 Complication: AOM.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.
Figures and Tables -
Analysis 3.1

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.
Figures and Tables -
Analysis 3.2

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 3 Late outcome: cure or no cure after 3 months.
Figures and Tables -
Analysis 3.3

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 3 Late outcome: cure or no cure after 3 months.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 4 Side effect: any significant side effects at or before one month.
Figures and Tables -
Analysis 3.4

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 4 Side effect: any significant side effects at or before one month.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 5 Outcome: hearing at or less than 3 months.
Figures and Tables -
Analysis 3.5

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 5 Outcome: hearing at or less than 3 months.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 6 Late outcome: hearing at 1 year.
Figures and Tables -
Analysis 3.6

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 6 Late outcome: hearing at 1 year.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 7 Late outcome: school performance at 1 year.
Figures and Tables -
Analysis 3.7

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 7 Late outcome: school performance at 1 year.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 8 Outcome: surgery (tympanostomy (myringotomy)).
Figures and Tables -
Analysis 3.8

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 8 Outcome: surgery (tympanostomy (myringotomy)).

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 9 Complication: recurrent OME.
Figures and Tables -
Analysis 3.9

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 9 Complication: recurrent OME.

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 10 Complication: AOM.
Figures and Tables -
Analysis 3.10

Comparison 3 Antihistamine/decongestant combination versus control, Outcome 10 Complication: AOM.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.
Figures and Tables -
Analysis 4.1

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 1 Primary outcome: cure or no cure at or before 1 month.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.
Figures and Tables -
Analysis 4.2

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 2 Secondary outcome: cure or no cure at 1‐3 months.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 3 Late outcome: cure or no cure after 3 months.
Figures and Tables -
Analysis 4.3

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 3 Late outcome: cure or no cure after 3 months.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 4 Side effect: any significant side effects at or before 1 month.
Figures and Tables -
Analysis 4.4

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 4 Side effect: any significant side effects at or before 1 month.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 5 Outcome: hearing on or about 1 month.
Figures and Tables -
Analysis 4.5

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 5 Outcome: hearing on or about 1 month.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 6 Late outcome: hearing at 1 year.
Figures and Tables -
Analysis 4.6

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 6 Late outcome: hearing at 1 year.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 7 Late outcome: school performance at 1 year.
Figures and Tables -
Analysis 4.7

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 7 Late outcome: school performance at 1 year.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 8 Outcome: surgery (tympanostomy (myringotomy)).
Figures and Tables -
Analysis 4.8

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 8 Outcome: surgery (tympanostomy (myringotomy)).

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 9 Complication: recurrent OME.
Figures and Tables -
Analysis 4.9

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 9 Complication: recurrent OME.

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 10 Complication: AOM.
Figures and Tables -
Analysis 4.10

Comparison 4 Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control, Outcome 10 Complication: AOM.

Table 1. Search filter

Filter

40. limit 39 to (clinical trial or clinical trial, phase i or clinical trial, phase ii or clinical trial, phase iii or clinical trial, phase iv or controlled clinical trial or meta analysis or multicenter study or randomized controlled trial)
41. clinical trial.pt.
42. exp Clinical trials/
43. ((clinical or control$ or compar$) adj (study or studies or trial$)).ti,ab,sh.
44. multicenter study.pt.
45. (multicenter$ or multicentre$ or multi‐centre$ or multi‐center$).ti,ab,sh.
46. random$.ti,ab,sh. or randomized controlled trial.pt.
47. (blind$ or mask$ or placebo$).ti,ab,sh.
48. (single‐blind$ or double‐blind$ or triple‐blind$).ti,ab,sh.
49. Double‐blind method/ or Meta‐analysis/ or Random allocation/ or Research design/
50. 39 and (41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49)
51. meta‐analy$.mp. [mp=title, abstract, registry number word, mesh subject heading]
52. metaanaly$.mp. [mp=title, abstract, registry number word, mesh subject heading]
53. meta‐analysis.pt.
54. meta‐analysis/
55. overview$.ti,ab.
56. (quantitativ$ adj (review or overview)).tw.
57. (systematic$ adj (review or overview)).tw.
58. (methodologic$ adj (review or overview)).tw.
59. (integrative research review or research integration).mp. [mp=title, abstract, registry number word, mesh subject heading]
60. (quantitativ$ adj synthes$).mp. [mp=title, abstract, registry number word, mesh subject heading]
61. 39 and (51 or 52 or 53 or 54 or 55 or 56 or 57 or 58 or 59 or 60)
62. (40 or 50 or 61) not animal.mp. [mp=title, abstract, registry number word, mesh subject heading]
63. 40 or 50 or 61
64. limit 63 to human
65. 62 or 64
66. from 65 keep 1‐43

Figures and Tables -
Table 1. Search filter
Comparison 1. Antihistamine versus control

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Secondary outcome: cure or no cure at 1‐3 months Show forest plot

2

140

Risk Ratio (M‐H, Fixed, 95% CI)

0.94 [0.65, 1.36]

2 Complication: AOM Show forest plot

1

46

Risk Ratio (M‐H, Fixed, 95% CI)

0.89 [0.46, 1.73]

Figures and Tables -
Comparison 1. Antihistamine versus control
Comparison 2. Decongestant versus control

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Primary outcome: cure or no cure at or before 1 month Show forest plot

3

276

Risk Ratio (M‐H, Fixed, 95% CI)

1.06 [0.92, 1.22]

2 Secondary outcome: cure or no cure at 1‐3 months Show forest plot

2

216

Risk Ratio (M‐H, Fixed, 95% CI)

1.05 [0.85, 1.30]

3 Side effect: any significant side effects at or before one month Show forest plot

1

172

Risk Ratio (M‐H, Fixed, 95% CI)

11.05 [0.66, 185.38]

4 Outcome: hearing on or about 1 month Show forest plot

1

15

Risk Ratio (M‐H, Fixed, 95% CI)

0.88 [0.16, 4.68]

5 Outcome: surgery (tympanostomy (myringotomy)) Show forest plot

1

172

Risk Ratio (M‐H, Fixed, 95% CI)

1.07 [0.71, 1.62]

6 Complication: AOM Show forest plot

1

44

Risk Ratio (M‐H, Fixed, 95% CI)

0.55 [0.23, 1.31]

Figures and Tables -
Comparison 2. Decongestant versus control
Comparison 3. Antihistamine/decongestant combination versus control

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Primary outcome: cure or no cure at or before 1 month Show forest plot

4

901

Risk Ratio (M‐H, Fixed, 95% CI)

0.97 [0.89, 1.04]

2 Secondary outcome: cure or no cure at 1‐3 months Show forest plot

3

158

Risk Ratio (M‐H, Fixed, 95% CI)

1.09 [0.85, 1.40]

3 Late outcome: cure or no cure after 3 months Show forest plot

2

119

Risk Ratio (M‐H, Fixed, 95% CI)

1.24 [0.72, 2.13]

4 Side effect: any significant side effects at or before one month Show forest plot

5

972

Risk Ratio (M‐H, Fixed, 95% CI)

2.54 [1.76, 3.67]

5 Outcome: hearing at or less than 3 months Show forest plot

3

343

Risk Ratio (M‐H, Fixed, 95% CI)

1.09 [0.93, 1.27]

6 Late outcome: hearing at 1 year Show forest plot

1

48

Risk Ratio (M‐H, Fixed, 95% CI)

1.5 [0.63, 3.56]

7 Late outcome: school performance at 1 year Show forest plot

1

42

Risk Ratio (M‐H, Fixed, 95% CI)

0.81 [0.35, 1.86]

8 Outcome: surgery (tympanostomy (myringotomy)) Show forest plot

2

57

Risk Ratio (M‐H, Random, 95% CI)

0.54 [0.09, 3.41]

9 Complication: recurrent OME Show forest plot

2

284

Risk Ratio (M‐H, Fixed, 95% CI)

1.3 [0.92, 1.83]

9.1 Quality score 3 or greater

1

94

Risk Ratio (M‐H, Fixed, 95% CI)

1.67 [0.92, 3.01]

9.2 Quality score less than 3

1

48

Risk Ratio (M‐H, Fixed, 95% CI)

0.75 [0.31, 1.83]

9.3 Allocation concealment adequate

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

9.4 Allocation concealment not adequate

2

142

Risk Ratio (M‐H, Fixed, 95% CI)

1.3 [0.80, 2.11]

10 Complication: AOM Show forest plot

1

636

Risk Ratio (M‐H, Fixed, 95% CI)

0.76 [0.46, 1.26]

10.1 Quality score 3 or greater

1

318

Risk Ratio (M‐H, Fixed, 95% CI)

0.76 [0.37, 1.55]

10.2 Quality score less than 3

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

10.3 Allocation concealment adequate

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

10.4 Allocation concealment not adequate

1

318

Risk Ratio (M‐H, Fixed, 95% CI)

0.76 [0.37, 1.55]

Figures and Tables -
Comparison 3. Antihistamine/decongestant combination versus control
Comparison 4. Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Primary outcome: cure or no cure at or before 1 month Show forest plot

7

1177

Risk Ratio (M‐H, Fixed, 95% CI)

0.99 [0.92, 1.05]

2 Secondary outcome: cure or no cure at 1‐3 months Show forest plot

7

514

Risk Ratio (M‐H, Fixed, 95% CI)

1.04 [0.89, 1.21]

3 Late outcome: cure or no cure after 3 months Show forest plot

2

119

Risk Ratio (M‐H, Fixed, 95% CI)

1.24 [0.72, 2.13]

4 Side effect: any significant side effects at or before 1 month Show forest plot

6

1144

Risk Ratio (M‐H, Fixed, 95% CI)

2.70 [1.87, 3.88]

5 Outcome: hearing on or about 1 month Show forest plot

4

358

Risk Ratio (M‐H, Fixed, 95% CI)

1.08 [0.93, 1.27]

6 Late outcome: hearing at 1 year Show forest plot

1

48

Risk Ratio (M‐H, Fixed, 95% CI)

1.5 [0.63, 3.56]

7 Late outcome: school performance at 1 year Show forest plot

1

42

Risk Ratio (M‐H, Fixed, 95% CI)

0.81 [0.35, 1.86]

8 Outcome: surgery (tympanostomy (myringotomy)) Show forest plot

3

229

Risk Ratio (M‐H, Fixed, 95% CI)

0.96 [0.69, 1.32]

9 Complication: recurrent OME Show forest plot

2

142

Risk Ratio (M‐H, Fixed, 95% CI)

1.3 [0.80, 2.11]

10 Complication: AOM Show forest plot

3

408

Risk Ratio (M‐H, Fixed, 95% CI)

0.74 [0.48, 1.14]

Figures and Tables -
Comparison 4. Any medication: antihistamine, decongestant or antihistamine/decongestant combination versus control