Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Symptom improvement
Systematic review	People with psoriasis (severity not reported), number of people in analysis not reported 3 RCTs in this analysis	Improvement in psoriasis severity scores 4–8 weeks with dithranol with placebo Absolute results not reported	SMD –1.04 95% CI –1.65 to –0.42	Effect size not calculated	dithranol