Table 2 Summary regional and global changes in the prevalence of self‐reported asthma symptoms (video questionnaire) between phase I and phase III in 13–14‐year‐old children: percentage change in symptom prevalence per year (and phase III symptom prevalence perentage).

Centre	Phase I (n)	Phase III (n)	Current wheeze	Exercise wheeze	Night wheeze	Night cough	Severe wheeze
Africa	14465	11467	0.33 (11.0)	0.23 (14.6)	0.16 (6.2)	0.67 (19.7)	0.29 (7.7)
Asia‐Pacific	53679	51196	0.11 (6.8)	0.25 (10.7)	0.02 (2.0)	0.30 (10.4)	0.05 (3.5)
Eastern Mediterranean	6031	8851	−0.05 (6.3)	0.06 (8.8)	−0.03 (3.1)	0.08 (8.8)	−0.04 (3.2)
Indian subcontinent	12562	11552	0.32 (7.3)	0.15 (4.8)	0.30 (4.9)	0.18 (4.8)	0.00 (3.1)
Latin America	18003	18599	−0.04 (11.9)	−0.10 (14.2)	0.00 (4.5)	0.74 (20.6)	0.01 (6.5)
North America	5673	4895	−0.26 (11.3)	−0.80 (18.6)	−0.11 (8.3)	0.62 (17.7)	−0.44 (7.2)
Northern and Eastern Europe	13970	13167	0.03 (2.7)	0.15 (6.3)	0.02 (1.6)	0.23 (7.5)	0.06 (1.7)
Oceania	15408	13205	−0.76 (11.2)	−1.64 (15.9)	−0.73 (5.1)	−0.32 (19.4)	−0.56 (7.4)
Western Europe	33722	34581	0.00 (7.3)	−1.24 (13.2)	−0.18 (3.1)	0.23 (16.0)	0.07 (4.4)
Global total	173513	167513	0.00 (7.9)	−0.21 (11.6)	−0.04 (3.4)	0.25 (13.6)	0.02 (4.5)