This shows the mean prevalence of any wheeze in the past 12 months for each country ranked by the mean prevalence of 4 or more attacks in the past 12 months. The former is a sensitive measure of asthma and may include some very mild wheezing. It ranged from under 5% in Albania, China, Greece, Georgia, Indonesia, Romania and Russia to 29-32% in Australia, New Zealand, Republic of Ireland and the UK. The prevalence of 4 or more attacks is a more specific indicator of clinically important asthma. This ranged from less than 1% in Albania, Indonesia, Uzbekistan, Russia, Romania, Greece, Georgia and China to over 9% in Australia, New Zealand, UK and Canada and tended to correlate with the prevalence of less frequent wheezing. This suggests that higher prevalences of wheezing in these English speaking countries are unlikely to be explained solely by over reporting of mild symptoms.