Table 2

Percentage of children who perfectly ranked individual pictures within each pictorial set. n = 22, 6–7 year olds, n = 56, 8–18 year olds.

Age group

Effort

Throat narrowing

Chest tightness

6–7

22

39

43

8–18

66

73

91

McGrath et al. BMC Pediatrics 2005 5:33   doi:10.1186/1471-2431-5-33