Validation of the ISAAC Standardized Questionnaire Used by Schoolchildren from Mexicali, Baja California, Mexico

Table 5

Descriptive statistics and main outcomes of the study population according to the classification obtained by gold standard index.

	Asthmatics (𝑛=54)	Nonasthmatics (𝑛=60)	𝑃 value^a
	Mean (SD)	Mean (SD)
P (asthmatics)^b, %	67.4 (7.5)	23.4 (7.7)	0.000
Discriminant scores	1.1 (0.4)	−0.9 (0.4)	0.000
FeNO (ppb), median (P25, P75)^c	10.8 (7.5, 16.0)	13.5 (9.3, 27.5)	0.017
logFeNO (ppb)	2.4 (0.7)	2.8 (0.8)	0.009
FEV1 (L)^d	2.2 (6.0)	1.9 (6.4)	0.766
Atopics, %	98.2	3.3	0.000

^a𝑃<0.05.  
^bP (asthmatics): probability of being in the asthmatic group.
^cMann-Whitney test.
^dAverage change between pre- and postspirometry test.