Table 2.

Correct rate of double bronchodilator and its influencing factors.

	Total cases	Correct	Error	P value
GOLD grade, n (%)				0.032
Class C	53 (52.0)	37 (69.8)	16 (30.2)
Class D	49 (48.0)	24 (49.0)	25 (51.0)
Age, n (%)				0.031
<65	43 (42.2)	31 (72.1)	12 (27.9)
≥65	59 (57.8)	30 (50.8)	29 (49.2)
Education level, n (%)				0.313
Primary and below	51 (50)	33 (64.7)	18 (35.3)
Junior high and above	51 (50)	28 (54.9)	23 (45.1)
Usage time, n (%)				0.175
<6 months	72 (70.6)	40 (55.6)	32 (44.4)
≥6 months	30 (29.4)	21 (70.0)	9 (30.0)