Table 5.

Distribution and assessment of differences in the students’ initial spirometry test results in the intervention classrooms. (Significant differences are bolded.)

	Intervention	Intervention
Student FEV1%a	HEPAb (n=43)	SHAM (n=38)	T-test	p-value
Average	98.5	100.5	−0.58	0.56
Standard Deviation	14.9	15.8	F-test	p-value
Variance	222	250	0.89	0.36

^apercentage predicted forced expiratory volume at 1 sec

^bEnvironmental Relative Moldiness Index