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Table 3 Determinants of knowledge, and professional practice concerning hazardous chemicals in research laboratories

From: Chemical risk and safety awareness, perception, and practices among research laboratories workers in Italy

Variable

  

Univariate analysis

Multivariate analysis

Outcome: Knowledge on hazardous chemicals used by research laboratory workers

N

%

OR

95% CI

p

OR

95% CI

p

Log-likelihood = − 144.245, χ2 = 34.5, P value = 0.0001, No. of obs. = 234

 Laboratory site

  University of Catanzaro

85

54.1

1.00*

  

1.00*

  

  University of Cosenza

24

30

0.36

0.02–0.64

0.001

0.27

0.12–0.58

0.001

Gender

 Male

28

52.8

1.00*

  

1.00*

  

 Female

81

44

0.7

0.38–1.29

0.258

0.54

0.27–1.07

0.080

Age, years

  ≤ 30

40

47.1

1.00*

  

1.00*

  

 31–40

45

51.7

1.20

0.66–2.19

0.541

0.49

0.21–1.14

0.102

  > 40

24

36.9

0.65

0.34–1.27

0.215

0.25

0.08–0.76

0.015

Employment status

 Temporary workers

54

45.4

1.00*

  

1.00*

  

 Permanent workers

54

46.2

0.98

0.77–1.26

0.922

2.1

0.85–5.16

0.105

Number of hazardous chemicals used in the attended lab

  ≤ 5

42

43.3

1.00*

  

1.00*

  

 6–10

58

53.2

1.48

0.85–2.58

0.156

2.56

1.34–4.91

0.004

  > 10

9

29

0.53

0.22–1.28

0.161

2.20

0.71–6.75

0.167

Number of months working in the attended lab

  < 24

39

42.4

1.00*

  

1.00*

  

 24–48

23

50

1.35

0.66–2.76

0.398

1.38

0.65–2.92

0.391

 49–120

28

66.7

2.71

1.26–5.83

0.010

2.99

1.31–6.85

0.009

  > 120

19

34.6

0.71

0.35–1.43

0.347

Backward elimination

Outcome: Self-reported preventive measures adopted by the workers during their research practices in the laboratories

N

%

OR

95% CI

p

OR

95% CI

p

Log-likelihood = − 118.733, χ2 = 76.16, P value < 0.0001, No. of obs. = 234

Number of hazardous chemical used in current lab

  ≤ 5

36

37.1

1.00*

  

1.00*

  

 6–10

48

44

1.33

0.76–2.33

0.313

1.48

0.76–2.89

0.247

 > 10

9

29

0.69

0.28–1.66

0.413

Backward elimination

Number of months working in the attended lab

   < 24

29

31.5

1.00*

  

1.00*

  

  24–48

24

52.2

2.36

1.14–4.90

0.020

3.24

1.33–7.89

0.009

  9–120

19

45.2

1.79

0.84–3.79

0.127

2.02

0.82–4.94

0.122

   > 120

20

36.4

1.24

0.61–2.50

0.547

Backward elimination

Visit to GP in the previous year

 No

25

32.9

1.00*

  

1.00*

  

 Yes

68

42.2

1.49

0.84–2.64

0.17

1.41

0.69–2.86

0.338

Perception of safety of workplace

 Unsafe

14

27.5

1.00*

  

1.00*

  

 Somewhat safe

30

33.3

1.32

0.62–2.81

0.469

1.69

0.62–4.59

0.299

 Safe

49

51

2.75

1.32–5.73

0.007

1.75

0.64–4.79

0.274

Perception of risk associated to chemical exposure

  < 4 (not much)

51

47.2

1.00*

  

1.00*

  

  ≥ 4 (much)

42

32.6

0.53

0.31–0.91

0.02

0.4

0.18–0.86

0.020

Perception of exposure to biological risk

 1–2 (not exposed)

31

33

1.00*

  

1.00*

  

 3 (moderately exposed)

19

38.8

1.28

0.62–2.63

0.491

2.35

0.92–5.96

0.072

 4–5 (very exposed)

43

45.7

1.71

0.94–3.09

0.074

2.81

1.24–6.38

0.013

Risk perception of radiation exposure

 1–2 (not exposed)

66

37.1

1.00*

  

1.00*

  

 3 (moderately exposed)

20

50

1.69

0.85–3.38

0.133

2.53

0.97–6.56

0.055

 4–5 (very exposed)

7

36.8

0.98

0.37–2.63

0.984

2.22

0.64–7.65

0.205

The laboratory colleagues handle chemicals following safety procedures

 1–2 (strongly disagree or disagree)

10

19.2

1.00*

  

1.00*

  

 3 (uncertain)

18

40.9

2.9

1.16–7.25

0.022

7.24

2.16–24.22

0.001

 4–5 (strongly agree or agree)

65

46.1

3.59

1.67–7.71

0.001

2.97

1.08–8.15

0.034

Availability of proper PPE

 1–2 (strongly disagree or disagree)

14

26.9

1.00*

  

1.00*

  

 3 (uncertain)

11

27.5

1.02

0.40–2.59

0.951

0.48

0.18–1.27

0.140

 4–5 (strongly agree or agree)

68

46.9

2.39

1.19–4.79

0.014

Backward elimination

Perception that safety measures protect from unwanted effects related to exposure to chemicals

 1–2 (strongly disagree or disagree)

24

30

1.00*

  

1.00*

  

 3 (uncertain)

7

23.3

0.71

0.26–1.87

0.490

0.2

0.058–0.7

0.012

 4–5 (strongly agree or agree)

62

48.8

2.22

1.23–4.02

0.008

Backward elimination

Perception that exposure to cancerogenic chemicals is extremely low

 1–2 (strongly disagree or disagree)

47

38.2

1.00*

  

1.00*

  

 3 (uncertain)

7

22.6

0.47

0.18–1.18

0.108

0.26

0.08–0.81

0.020

 4–5 (strongly agree or agree)

39

47

1.43

0.81–2.51

0.211

Backward elimination

Perception of having received an adequate training in management of accidents and first aid

 1–2 (inadequate)

11

19.3

1.00*

  

1.00*

  

 3 (just adequate)

33

43.4

3.2

1.44–7.13

0.004

3.93

1.5–10.26

0.005

 4–5 (totally adequate)

49

47.1

3.72

1.73–7.98

0.001

2.27

0.89–5.81

0.086

Perception of having received an adequate training in the interpretation of safety data sheets

 1–2 (inadequate)

12

26.1

1.00*

  

1.00*

  

 3 (just adequate)

13

24.1

0.89

0.36–2.22

0.817

0.17

0.06–0.45

< 0.001

 4–5 (totally adequate)

68

49.6

2.79

1.33–5.84

0.006

Backward elimination

  1. GP general practitioner
  2. * Reference category
  3. The following variables were removed from model 2 by backward elimination procedure: gender; laboratory site; employment status; knowledge on hazardous chemicals; perception that inadequate training in safe chemicals handling can contribute to risk of injury; training regarding management of accidents; training regarding use of PPE; training regarding decontamination procedures in case of accidental spillage of hazardous chemicals