Quality or quantity? Exploring the relationship between Public Open Space attributes and mental health in Perth, Western Australia

► Public Open Space (POS) quality appears significantly and negatively associated with psychological distress. ► Residents near medium or high quality POS have twice the odds of better mental health as those near low quality POS. ► POS quality appears to be more important for mental health than POS quantity. ► Residents may not need to use POS to benefit from it.