Positive effect of deep diaphragmatic breathing training on gastroesophageal reflux-induced chronic cough: a clinical randomized controlled study

Table 4 Comparison of DE, DTF and EMG of between the two groups (post-therapy)

	Abdominal Breathing			Quite Breathing
	GERC group (n = 22)	Control group (n = 20)	Test results	GERC group (n = 22)	Control group (n = 20)	Test results
DE (dm)	0.51 (0.05)	0.51 (0.04)	t = 0.121, P = 0.904	0.17 (0.02)	0.17 (0.00)	t = 0.116, P = 0.908
DTF (%)	169.50 (22.47)	150.55 (25.54)	t = 2.558, P = 0.014	59.82 (11.08)	55.10 (12.85)	t = 1.278, P = 0.209
sEMdi (%MVC)	79.00 (2.49)	74.65 (1.93)	t = 6.228, P = 0.000	72.73 (1.96)	67.15 (2.48)	t = 8.136, P = 0.000

Data are presented as mean (SD)
DE: Diaphragm excursion; DTF: Diaphragm Thickening fraction; sEMGdi: surface diaphragmatic EMG activity; MVC: maximal voluntary contraction

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