Table 4.

Correlation between diaphragm thickness and mobility and other variables for the studied patients

Variables	Right diaphragmatic thickness		Right diaphragmatic excursion		Left diaphragmatic thickness		Left diaphragmatic excursion
	r*	p**	r*	p**	r*	p**	r*	p**
Age	0.031	0.87	0.309	0.084	0.12	0.512	0.456	0.009**
MRC dyspnea score	0.245	0.178	0.117	0.524	0.156	0.394	0.176	0.335
Weight	0.076	0.68	0.316	0.078	0.127	0.49	0.395	0.025**
Height	0.031	0.89	0.456	0.029**	0.087	0.694	0.493	0.017**
BMI	0.39	0.076	0.085	0.707	0.401	0.058	0.058	0.792
FEV1	0.109	0.74	0.539	0.707	0.073	0.822	0.451	0.141
FVC	0.018	0.96	0.341	0.278	0.17	0.596	0.268	0.400
FEV1/FVC	0.49	0.104	0.686	0.014**	0.308	0.331	0.596	0.041**
MMEF	0.419	0.301	0.630	0.094	0.140	0.741	0.540	0.167
Frequency of hospital admission	0.24	0.189	0.018	0.92	0.196	0.291	0.039	0.832
Respiratory rate	0.11	0.67	0.044	0.863	0.317	0.2	0.089	0.726
Heart rate	0.37	0.14	0.553	0.017**	0.236	0.345	0.47	0.047**
Oxygen saturation	0.12	0.612	0.164	0.489	0.432	0.057	0.164	0.490
6MWT	0.32	0.28	0.06	0.845	0.356	0.232	0.065	0.834

BMI body mass index, FEV1 forced expiratory volume in one second, FVC forced vital capacity, MRC modified Medical Research Center, 6MWT six-minute walk test

*r Pearson correlation coefficient; **Statistically significant p value less than 0.05