Table 2.

Presence of the different components of the respiratory-related evoked potentials (RREPs) in the controls and the patients with asthma, cystic fibrosis, and neuromuscular diseases.

RREP components	Controls n = 11	P (controls vs pooled patients)	Patients with asthma n = 21	Patients with cystic fibrosis n = 32	Patients with neuromuscular disease n = 16	P (between the patient groups)
P1 (Cz-C3)	11	0.003	12	14	12	NS
P1 (Cz-C4)	11	0.01	13	17	13	NS
N1 (Cz-C3)	11	0.0002	14	17	16 #	0.07
N1 (Cz-C4)	11	0.02	16	20	15 #	0.002
P2 (Cz-C3)	11	0.0001	13	12	14 #	0.003
P2 (Cz-C4)	11	0.00001	16	14	16 #	0.0001
N2 (Cz-C3)	11	0.004	9	14	8	NS
N2 (Cz-C4)	11	0.003	10	13	10	NS

The controls were compared to the pooled patients using the Student t test or Chi-squared test where appropriate. Comparison between the 3 groups of patients was made using the Fisher's exact test. #Significant differences were observed between the patients with neuromuscular disease and the two other groups, no differences were observed between patients with cystic fibrosis and asthma.