Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Hospital stay
RCT	108 people with large primary spontaneous pneumothorax or primary spontaneous pneumothorax that had failed aspiration	Mean hospital stay 8.0 days with thoracoscopic surgery plus talcum powder instillation 7.4 days with chest-tube drainage	Significance assessment not performed