Table 3.

Frequency and mean ± standard deviation (SD) of patient’s basic characteristics.

Characteristics	Group	Frequency	Percent
Sex	women	49	67.1
	man	24	32.9
Age	<40 years	5	6.9
	40–49 years	22	30.1
	50–60 years	20	27.4
	>60 years	26	35.6
Days of hospitalization	<3	2	1.6
	3–5	112	86.8
	>5	15	11.6
Drug coverage grade	<25%	7	5.4
	25–50%	10	7.8
	50–75%	12	9.3
	>75%	100	77.5
Lobe	Right	50	68.5
	Left	21	28.8
	Both	2	2.7
Number of procedures	1	33	45.2
	2	27	37
	3	10	13.7
	4	3	4.1