Table 1 Characteristics of non-hospitalized patients with respect to the distance from the accident spot

Sex

0.639

 Male

55

75.3

94

72.3

149

73.4

 Female

18

24.7

36

27.7

54

26.6

Age

0.095

 <29 years

26

35.6

34

26.2

60

29.6

 30–39 years

25

34.2

51

39.2

76

37.4

 40–49 years

20

27.4

30

23.1

50

24.6

 >50 years

2

2.7

15

11.5

17

8.4

Exposure type

0.016

 Workers

43

58.9

68

52.3

111

54.7

 Adjacent residents

25

34.2

33

25.4

58

28.6

 Firefighters and officer

1

1.4

2

1.5

3

1.5

 Others

4

5.5

27

20.8

31

15.3

Smoking

0.020

 Non-smoking

60

82.2

87

66.9

147

72.4

 Smoking

13

17.8

43

33.1

56

27.6

Time of 1 ^st hospital visit

0.099

 1^st day

42

57.5

100

76.9

142

70.0

 2^nd day

24

32.9

14

10.8

38

18.7

 After 3^rd day

7

9.6

16

12.3

23

11.3

Period of stay

<0.001

 Within 1 h

22

30.1

22

18.4

44

22.7

 1–2 h

32

43.8

27

20.8

59

29.1

 2–4 h

4

5.5

20

15.4

24

11.8

 4–6 h

5

6.8

43

33.1

48

23.6

 >6 h

10

13.7

16

12.3

26

12.8