. Author manuscript; available in PMC: 2015 Jul 1.

Published in final edited form as: Respir Physiol Neurobiol. 2014 Apr 4;198:13–19. doi: 10.1016/j.resp.2014.03.013

Table 3.

Changes in forced expiratory volumes caused by hyperventilation of humidified air at hot (HA) and room temperature (RA).

AR patients (n=7)

	FEV₁ (liters)		FVC (liters)		FEV₁/FVC

	Before	After	Before	After	Before	After
RA	3.12 ± 0.28	2.99 ± 0.25	3.84 ± 0.35	3.78 ± 0.32	81.26 ± 2.01	79.44 ± 1.37
HA	3.12 ± 0.30	3.08 ± 0.30	3.82 ± 0.37	3.92 ± 0.36^†	82.09 ± 2.12	78.31 ± 1.44^*

Healthy subjects (n=6)

	FEV₁ (liters)		FVC (liters)		FEV₁/FVC

	Before	After	Before	After	Before	After
RA	3.67 ± 0.32	3.63 ± 0.32	4.50 ± 0.44	4.54 ± 0.44	82.07 ± 2.26	80.43 ± 2.56
HA	3.66 ± 0.33	3.63 ± 0.33	4.46 ± 0.46	4.53 ± 0.49	82.52 ± 2.39	80.96 ± 2.47

Forced expiratory tests were performed before and at ~8 minutes after the hyperventilation challenge in allergic rhinitis (AR) patients and healthy subjects.

Significant difference between before and after the hyperventilation challenge.

^†

Significant different from the corresponding RA data.