Table 4 Univariate analysis of risk factors for severe asthma exacerbation in the follow-up period

Applying of ICS/ICS + LABA/ICS + LAMA ≤ 3 m

152.78

<0.001

ACT scores ≤15

53.33

<0.001

ACT scores ≤20

0.087

0.72

Severe asthma

83.14

<0.001

Following up irregularly

86.32

<0.001

Lower income level than average PCDI

63.43

<0.001

Middle school and lower educational level

58.76

<0.001

Hospital days ≥15d

30.02

0.002

Hospital days >7d

1.55

0.38

Rural residence

22.51

0.005

FEV1 ≤ 50 % predicted

11.13

0.02

FEV1 ≤ 80 % predicted

0.019

0.89

Current and former smoking

2.32

0.18

Female

1.99

0.24

Older > 60 years old

11.11

0.02

Older > 40 years old

0.07

0.88

New Rural Cooperative Medical Insurance (NRCMI)

7.53

0.05

Jobs in factory or manual labor

1.86

0.36

Jobs in office

1.67

0.34

Farmer, poultry or livestock breeder

6.19

0.06

Retired, housework

0.57

0.33

Former smoke

0.18

0.64

High school

0.05

0.77

 Allergic status

5.07

0.08

 Allergic rhinitis

2.05

0.14

 pneumonia

0.18

0.65

 Circulation system disease

0.87

0.16

 Nervous system disease

0.17

0.69

 Digestive system disease

1.79

0.30

Application of other asthma medicines (n/%)

0.06

0.71