Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Recurrence
Systematic review	194 people with primary or recurrent spontaneous pneumothorax 3 RCTs in this analysis	Recurrence at 1 year with needle aspiration with chest-tube drainage Absolute results not reported	RR 0.73 95% CI 0.39 to 1.38		Not significant