Skip to main content

Table 3 Evaluation of risk factors for self-reported asthma

From: Exposure to high endotoxin concentration increases wheezing prevalence among laboratory animal workers: a cross-sectional study

Variables

Categories

Reported asthma

  

Crude model

Adjusted model

  

PR

95 % CI

p value

PR

95 % CI

p value

Group

Exposed vs Non-exposed

0.98

0.66

1.47

0.94

0.99

0.67

1.47

0.96

Endotoxin levels

Low vs High

0.99

0.66

1.47

0.95

1.01

0.68

1.50

0.96

Institutions

UNICAMP vs USP

1.01

0.68

1.50

0.97

1.06

0.73

1.56

0.76

Atopy

Yes vs No

7.93

4.29

14.68

<0.01

7.69

4.18

14.16

<0.01

Smoking

Yes vs No

0.88

0.51

1.54

0.67

0.84

0.49

1.43

0.51

Sex

Male vs Female

1.09

0.72

1.63

0.69

1.15

0.77

1.73

0.49

Past exposure to laboratory animals

Yes vs No

1.41

0.94

2.11

0.10

1.26

0.86

1.84

0.24

Pet owning history

Yes vs No

1.19

0.77

1.82

0.43

1.13

0.76

1.70

0.54

Age

Continuous

0.99

0.97

1.01

0.16

1.01

0.99

1.04

0.21

Worker functions

Technicians/secretaries vs researchers

7.20

1.01

51,54

0.05

6.75

0.92

49.36

0.06

Students vs researchers

8.83

1.24

62.78

0.03

7.73

1.02

58.47

0.05

  1. PR prevalence ratio, CI confidence interval, UNICAMP State University of Campinas, USP University of São Paulo; Low endotoxin concentration: ≤ 20.4 EU/mg of dust; High endotoxin concentration: > 20.4 EU/mg of dust