Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

64 questions · 65 findings · 10 reviews · Headline outcomes only

No studies found 19 · 29.2%GRADE not reported 4 · 6.2%Very low 10 · 15.4%Low 18 · 27.7%Moderate 14 · 21.5%High 0 · 0%

Macrolide+tetracycline vs macrolides

All‐cause serious adverse events 60 weeks (end of study) · patients with chronic obstructive pulmonary disease

It is very uncertain whether macrolide+tetracycline changes all‐cause serious adverse events 60 weeks (end of study) compared with macrolide (very low certainty).

1 finding from 1 review

Macrolide+tetracycline vs macrolides

Number of people experiencing one or more exacerbations, Drug resistance/microbial sensitivity (as reported by trialists), including emergence of atypical bacteria, Number of participants colonised with Pseudomonas aeruginosa · patients with chronic obstructive pulmonary disease

The review found no eligible studies for this question.

1 finding from 1 review

Nicotinamide plus tetracycline vs prednisone

Disease control: complete response at 8 weeks: excluding dropouts · bullous pemphigoid

It is very uncertain whether nicotinamide plus tetracycline changes disease control: complete response at 8 weeks: excluding dropouts compared with prednisone (very low certainty).

1 finding from 1 review

Macrolides vs tetracycline

Exacerbations (number of people experiencing ≥ 1 exacerbations) · patients with chronic obstructive pulmonary disease

Macrolide showed no clear difference in number of participants experiencing one or more exacerbations… compared with tetracycline (low certainty).

1 finding from 1 review

Regimens containing macrolides (azithromycin) vs regimens containing tetracycline (doxycycline)

Clinical cure according to criteria established by study authors Mild‐moderate PID · women with PID

It is very uncertain whether regimens containing macrolides (azithromycin) changes clinical cure according to criteria established by study authors… compared with regimens containing tetracycline (doxycycline) (very low certainty).

2 findings from 1 review

Regimens containing macrolides (azithromycin) vs regimens containing tetracycline (doxycycline)

Clinical cure according to criteria established by study authors Severe PID · women with PID

Regimens containing macrolides (azithromycin) showed no clear difference in clinical cure according to criteria established by study authors… compared with regimens containing tetracycline (doxycycline) (low certainty).

1 finding from 1 review

Regimens containing macrolides (azithromycin) vs regimens containing tetracycline (doxycycline)

Adverse events: any antibiotic‐related adverse event leading to discontinuation of therapy · women with PID

Regimens containing macrolides (azithromycin) showed no clear difference in adverse events: any antibiotic‐related adverse event leading to… compared with regimens containing tetracycline (doxycycline) (low certainty).

1 finding from 1 review