Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

542 questions in 42 reviews · Skin

current versions
No studies 542 · 100%Ungraded 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Acyclovir + calamine + cetirizine vs calamine + cetirizine
The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Acyclovir + calamine + cetirizine vs calamine + cetirizine
The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by a medical practitioner · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Acyclovir vs erythromycin
The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Acyclovir vs erythromycin
Reduction in itch score within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Clarithromycin vs placebo
Reduction in itch score within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Clarithromycin vs placebo
Minor participant‐reported adverse events not requiring withdrawal of the treatment · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs placebo
The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs placebo
The proportion of participants with resolution of itch within 2 weeks, as rated by the participant · pityriasis rosea
Interventions for pityriasis rosea (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Severe skin drug‐induced rash · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Long‐term sequelae · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Hospitalisation for drug‐induced skin reaction · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
SJS/TEN (Stevens‐Johnson syndrome/toxic epidermal necrolysis) · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
AGEP (acute generalised exanthematous pustulosis) · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Death · patients with HIV‐1 infection and a pre‐established clinical need for treatment with an antiretroviral drug regimen…
Genetic testing for prevention of severe drug‐induced skin rash (2019) · Cochrane
no estimate extractedNRNo studies
Biotin vs placebo
Quality of life · infantile seborrhoeic dermatitis (including cradle cap)
Interventions for infantile seborrhoeic dermatitis (including cradle cap) (2019) · Cochrane
no estimate extractedNRNo studies
Proprietary products vs placebo
Quality of life · infantile seborrhoeic dermatitis (including cradle cap)
Interventions for infantile seborrhoeic dermatitis (including cradle cap) (2019) · Cochrane
no estimate extractedNRNo studies
Topical steroids vs comparator
Quality of life · infantile seborrhoeic dermatitis (including cradle cap)
Interventions for infantile seborrhoeic dermatitis (including cradle cap) (2019) · Cochrane
no estimate extractedNRNo studies
Intravenous soya oil‐derived (n‐6) fatty acid‐based lipid emulsion vs intravenous fish oil‐derived (n‐3) fatty acid‐based lipid emulsion
Percentage of participants clear or almost clear, i.e. obtaining PASI 100/90 and/or PGA of 0 or 1 in the short term · guttate psoriasis
Non‐antistreptococcal interventions for acute guttate psoriasis or an acute guttate flare of chronic psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Intravenous soya oil‐derived (n‐6) fatty acid‐based lipid emulsion vs intravenous fish oil‐derived (n‐3) fatty acid‐based lipid emulsion
Percentage of participants with adverse effects and severe adverse effects · guttate psoriasis
Non‐antistreptococcal interventions for acute guttate psoriasis or an acute guttate flare of chronic psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Intravenous soya oil‐derived (n‐6) fatty acid‐based lipid emulsion vs intravenous fish oil‐derived (n‐3) fatty acid‐based lipid emulsion
Number of relapses of guttate psoriasis or flares within a period of 6 months after the treatment has finished · guttate psoriasis
Non‐antistreptococcal interventions for acute guttate psoriasis or an acute guttate flare of chronic psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Intravenous soya oil‐derived (n‐6) fatty acid‐based lipid emulsion vs intravenous fish oil‐derived (n‐3) fatty acid‐based lipid emulsion
Percentage of participants achieving a PASI 75 or PGA of 1 or 2 · guttate psoriasis
Non‐antistreptococcal interventions for acute guttate psoriasis or an acute guttate flare of chronic psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Penicillin vs no treatment
Time‐to‐resolution: achieving PASI 90 to 100 or PGA 0 to 1 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs no treatment
Risk of having at least one relapse at long‐term · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Azithromycin vs vitamin C
Time‐to‐resolution: achieving PASI 90 to 100 or PGA 0 to 1 · chronic plaque psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Azithromycin vs vitamin C
Proportion of participants achieving clear or almost clear skin (PASI 90 to 100 or PGA 0 to 1) · chronic plaque psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Azithromycin vs vitamin C
Risk of having at least one relapse at long‐term · chronic plaque psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Rifampicin vs placebo
Time‐to‐resolution: achieving PASI 90 to 100 or PGA 0 to 1 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Rifampicin vs placebo
Proportion of participants with adverse events and severe adverse events · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Rifampicin vs placebo
Proportion of participants achieving clear or almost clear skin (PASI 90 to 100 or PGA 0 to 1) · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Rifampicin vs placebo
Proportion of participants achieving PASI 75 or PGA 1 to 2 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Rifampicin vs placebo
Risk of having at least one relapse at long‐term · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Tonsillectomy vs no intervention
Time‐to‐resolution: achieving PASI 90 to 100 or PGA 0 to 1 · chronic plaque psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Tonsillectomy vs no intervention
Risk of having at least one relapse at long‐term · chronic plaque psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Penicillin vs no treatment
Proportion of participants achieving PASI 75 or PGA 1 to 2 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Penicillin vs no treatment
Risk of having at least one relapse at long‐term · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs no treatment
Time‐to‐resolution: achieving PASI 90 to 100 or PGA 0 to 1 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs no treatment
Proportion of participants with adverse events and severe adverse events · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs no treatment
Proportion of participants achieving clear or almost clear skin (PASI 90 to 100 or PGA 0 to 1) · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Erythromycin vs no treatment
Proportion of participants achieving PASI 75 or PGA 1 to 2 · guttate psoriasis
Antistreptococcal interventions for guttate and chronic plaque psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Dietary intervention vs usual care
Time to relapse Not measured · people with psoriasis
Lifestyle changes for treating psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Dietary intervention and exercise programme vs information only
Quality of life Not measured · people with psoriasis
Lifestyle changes for treating psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Dietary intervention and exercise programme vs information only
Time to relapse Not measured · people with psoriasis
Lifestyle changes for treating psoriasis (2019) · Cochrane
no estimate extractedNRNo studies
Cetirizine 0.5 mg/kg/d vs placebo (18‐month intervention)
Primary outcome 1. Mean change in patient‐assessed symptoms Pruritus was assessed once as part of SCORAD · children with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Fexofenadine 120 mg/d vs placebo (1‐week intervention)
Secondary outcome 2. Mean change in quality of life · adults with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Loratadine 10 mg/d vs placebo (4‐week intervention)
Secondary outcome 2. Mean change in quality of life · male and female adults aged 15 years and older with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Loratadine 10 mg/d vs placebo (4‐week intervention)
Secondary outcome 3. Number of eczema flares, measured by, for example, ‘escalation of treatment’ or ‘use of topical anti‐inflammatory medications’ · male and female adults aged 15 years and older with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Loratadine 10 mg/d vs placebo (2‐week intervention)
Secondary outcome 2. Mean change in quality of life · male and female adults with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Loratadine 10 mg/d vs placebo (2‐week intervention)
Secondary outcome 3. Number of eczema flares, measured by, for example, ‘escalation of treatment’ or ‘use of topical anti‐inflammatory medications’ · male and female adults with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Cetirizine 0.5 mg/kg/d vs placebo (18‐month intervention)
Secondary outcome 2. Mean change in quality of life · children with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies
Cetirizine 10 mg/d vs placebo (4‐week intervention)
Secondary outcome 2. Mean change in quality of life · adults with eczema
Oral H1 antihistamines as ‘add‐on’ therapy to topical treatment for eczema (2019) · Cochrane
no estimate extractedNRNo studies