Nephrolepis exaltata Herbal Mask Increases Nasal IgA Levels and Pulmonary Function in Textile Factory Workers

Table 4

Mean score of FEV₁ before and after treatment.

Group	%FEV1 (Mean ± SD)			p	p
	Pre-test	Post-test	Δ FVC
Control	100.9 ± 11.8	90.0 ± 7.8	−1.9 ± 10.3	0.507	0.009
Treatment	97.82 ± 11.87	102.5 ± 11.5	4.7 ± 5.5	0.004

SD = Standard deviation, = Paired t-test, = Mann–Whitney test.