Impact of repeated patient counseling using different pressurized metered-dose inhalers training devices on inhalation technique, lung function, and asthma control in adult asthmatics

Beni-Suef University Journal of Basic and Applied Sciences

Table 4 Correlation table between correct performance of a step with FEV1% of predicted

Step Number	r with FEV1% of predicted (Visit 1)	r with FEV1% of predicted (Visit 2)	r with FEV1% of predicted (Visit 3)
Step 1	0	0	0
Step 2	0.016	0.015	− 0.032
Step 3	0.024	0.040	− 0.045
Step 4	0.107	0.035	− 0.051
Step 5	0.026	− 0.029	− 0.035
Step 6	0.091	0.137*	− 0.002
Step 7	− 0.031	0.104	0.2**
Step 8	− 0.075	− 0.094	0.047
Step 9	− 0.035	− 0.052	− 0.002
Step 10	− 0.016	− 0.136*	0.07
Step 11	0	0	0