Table 1.
ISAAC: International Study of Asthma and Allergies in Childhood, AIAP: Allergies in Asia Pacific. All figures are percentages. X: total includes countries not included in AIAP survey - India, Sri Lanka, New Zealand. ▴ Adapted from Aït-Khaled et al. [10]. See text for questions. +: in 13-14 year olds. *See Ref 12: response to question: "during the worst month period last year did you have red, itchy eyes or watery eyes". Answers include those who had symptoms from a few days to every day per week. †Adult populations >18 years.