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)

1,886 questions in 74 reviews · Skin

current versions
No studies 542 · 28.7%Ungraded 130 · 6.9%Very low 326 · 17.3%Low 434 · 23%Moderate 348 · 18.5%High 106 · 5.6%

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
Ustekinumab vs placebo
Proportion of participants with adverse effects ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Triamcinolone acetonide 0.1% cream with occlusive dressing vs clobetasol cream 0.05% cream
Ease of compliance to an intervention or a treatment ‐ not reported · for chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Ustekinumab vs placebo
Ease of compliance to an intervention or a treatment ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Guselkumab vs placebo
Proportion of participants cleared or almost cleared · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 1.17 [0.15, 9.3]2 studies · 154 participantsVery low
Guselkumab vs placebo
Proportion of participants with adverse effects serious or severe enough to have caused withdrawal · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 2.88 [0.32, 25.8]1 study · 49 participantsLow
Guselkumab vs placebo
Proportion of participants with at least 50% improvement in their quality of life ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Guselkumab vs placebo
Proportion of participants achieving a 50% reduction in disease severity · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 2.88 [1.24, 6.69]1 study · 49 participantsModerate
Guselkumab vs placebo
Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Guselkumab vs placebo
Proportion of participants with adverse effects ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Guselkumab vs placebo
Ease of compliance to an intervention or a treatment ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Secukinumab vs placebo
Proportion of participants cleared or almost clear ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Secukinumab vs placebo
Proportion of participants with adverse effects serious or severe enough to have caused withdrawal · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 3.29 [1.4, 7.75]1 study · 157 participantsModerate
Topical vitamin D derivative vs placebo
Proportion of participants cleared or almost cleared in the short term (8 weeks) · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 7.83 [1.85, 33.12]1 study · 188 participantsLow
Secukinumab vs placebo
Proportion of participants with at least 50% improvement in their quality of life ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Secukinumab vs placebo
Proportion of participants with a 50% reduction in disease severity · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
RR 1.55 [1.02, 2.35]1 study · 157 participantsModerate
Secukinumab vs placebo
Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Secukinumab vs placebo
Proportion of participants with adverse effects in the short term ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Secukinumab vs placebo
Ease of compliance to an intervention or a treatment ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Topical vitamin D derivative vs placebo
Proportion of participants with adverse effects serious or severe enough to have caused withdrawal ‐ not reported · chronic palmoplantar pustulosis
Interventions for chronic palmoplantar pustulosis (2020) · Cochrane
no estimate extractedNRNo studies
Salt bath + UVB vs UVB alone
PASI‐75 (number of participants with event) · patients with chronic plaque psoriasis
Indoor salt water baths followed by artificial ultraviolet B light for chronic plaque psoriasis (2020) · Cochrane
RR 1.71 [1.24, 2.35]2 studies · 278 participantsLow
Salt bath + UVB vs UVB alone
Treatment‐related adverse events requiring withdrawal (number of participants withdrawing) · patients with chronic plaque psoriasis
Indoor salt water baths followed by artificial ultraviolet B light for chronic plaque psoriasis (2020) · Cochrane
RR 0.96 [0.35, 2.64]2 studies · 404 participantsLow
Ciclopirox 8% lacquer vs vehicle
Complete cure: 48 weeks · people with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 9.29 [1.72, 50.14]2 studies · 460 participantsLow
Tavaborole 5% solution vs vehicle
Adverse events (directly related to treatment, collected over the course of the studies; they are not measured/reported for specific time points) · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 3.82 [1.65, 8.85]2 studies · 1186 participantsModerate
Tavaborole 5% solution vs vehicle
Mycological cure: 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 3.4 [2.34, 4.93]2 studies · 1198 participantsHigh
Tavaborole 5% solution vs vehicle
Clinical Cure ‐ not measured · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
P‐3051 (ciclopirox 8% hydrolacquer) vs comparators
Complete cure: 48 to 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 2.43 [1.32, 4.48]2 studies · 490 participantsModerate
P‐3051 (ciclopirox 8% hydrolacquer) vs comparators
Adverse events (collected over the course of the studies; they are not measured/reported for specific time points) · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 0.6 [0.19, 1.92]2 studies · 487 participantsLow
P‐3051 (ciclopirox 8% hydrolacquer) vs comparators
Mycological cure: 48 to 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.08 [0.85, 1.37]2 studies · 490 participantsModerate
P‐3051 (ciclopirox 8% hydrolacquer) vs comparators
Clinical cure ‐ not measured · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
1064‐nm Nd:YAG laser vs no treatment or sham treatment
Complete cure ‐ not measured · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
1064‐nm Nd:YAG laser vs no treatment or sham treatment
Adverse events (collected over the course of the studies; they are not measured/reported for specific time points) · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 4.85 [0.24, 97.11]2 studies · 85 participantsVery low
1064‐nm Nd:YAG laser vs no treatment or sham treatment
Mycological cure: 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.04 [0.59, 1.85]2 studies · 85 participantsLow
Ciclopirox 8% lacquer vs vehicle
Adverse events (directly related to treatment, collected over the course of the studies; they are not measured/reported for specific time points) · people with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.61 [0.89, 2.92]2 studies · 460 participantsLow
1064‐nm Nd:YAG laser vs no treatment or sham treatment
Clinical cure ‐ not measured · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
Luliconazole 5% solution vs vehicle
Complete cure: 48 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 2.96 [1.18, 7.41]1 study · 293 participantsVery low
Luliconazole 5% solution vs vehicle
Adverse events (collected over the course of the studies; they are not measured/reported for specific time points) · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.02 [0.9, 1.16]1 study · 293 participantsLow
Luliconazole 5% solution vs vehicle
Mycological cure: 48 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.39 [0.98, 1.97]1 study · 293 participantsLow
Luliconazole 5% solution vs vehicle
Clinical Cure ‐ not measured · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
Ciclopirox 8% lacquer vs vehicle
Mycological cure: 48 weeks · people with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 3.15 [1.93, 5.12]2 studies · 460 participantsModerate
Ciclopirox 8% lacquer vs vehicle
Clinical cure ‐ not measured · people with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
no estimate extractedNRNo studies
Efinaconazole 10% solution vs vehicle
Complete cure: 40 to 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 3.54 [2.24, 5.6]3 studies · 1716 participantsHigh
Efinaconazole 10% solution vs vehicle
Adverse events (collected over the course of the studies; they are not measured/reported for specific time points) · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 1.1 [1.01, 1.2]3 studies · 1701 participantsHigh
Efinaconazole 10% solution vs vehicle
Mycological cure: 40 to 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 2.31 [1.08, 4.94]3 studies · 1716 participantsModerate
Efinaconazole 10% solution vs vehicle
Clinical cure: 40 to 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 3.07 [2.08, 4.53]2 studies · 1655 participantsHigh
Tavaborole 5% solution vs vehicle
Complete cure: 52 weeks · People with fungal infections of the toenails
Topical and device‐based treatments for fungal infections of the toenails (2020) · Cochrane
RR 7.4 [2.71, 20.24]2 studies · 1198 participantsModerate
Serlopitant 5 mg vs placebo
Patient‐reported pruritus intensity · chronic pruritus of unknown origin
Interventions for chronic pruritus of unknown origin (2020) · Cochrane
RR 2.06 [1.27, 3.35]1 study · 126 participantsLow
Serlopitant 1 mg vs placebo
Sleep disturbances: number of participants with insomnia · chronic pruritus of unknown origin
Interventions for chronic pruritus of unknown origin (2020) · Cochrane
RR 0.38 [0.17, 0.84]1 study · 128 participantsVery low
Serlopitant 1 mg vs placebo
Depression · chronic pruritus of unknown origin
Interventions for chronic pruritus of unknown origin (2020) · Cochrane
no estimate extractedNRNo studies
Serlopitant 1 mg vs placebo
Patient satisfaction · chronic pruritus of unknown origin
Interventions for chronic pruritus of unknown origin (2020) · Cochrane
no estimate extractedNRNo studies
Serlopitant 0.25 mg vs placebo
Patient‐reported pruritus intensity · chronic pruritus of unknown origin
Interventions for chronic pruritus of unknown origin (2020) · Cochrane
RR 1.66 [1, 2.77]1 study · 127 participantsLow