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Table 3 Haemodynamic effects of exposure to wood smoke and filtered air

From: Effect of wood smoke exposure on vascular function and thrombus formation in healthy fire fighters

 

Baseline

Post-exposure

0 mins

10 mins

20 mins

30 mins

40 mins

50 mins

1 hr

2 hrs

6 hrs

24 hr mean

P-value1

Systolic pressure, mmHg

Filtered air

135 ± 2

134 ± 2

133 ± 2

130 ± 3

131 ± 2

131 ± 2

130 ± 3

133 ± 2

132 ± 2

130 ± 2

124 ± 2

0.59

Wood smoke

132 ± 2

135 ± 3

131 ± 3

130 ± 3

131 ± 3

130 ± 3

130 ± 3

135 ± 4

134 ± 5

131 ± 3

127 ± 2

Diastolic pressure, mmHg

Filtered air

75 ± 2

74 ± 3

75 ± 2

75 ± 2

73 ± 4

76 ± 2

76 ± 2

76 ± 2

76 ± 2

76 ± 27

68 ± 2

0.89

Wood smoke

75 ± 2

74 ± 2

74 ± 2

73 ± 2

74 ± 2

74 ± 2

76 ± 2

77 ± 2

77 ± 2

75 ± 2

70 ± 2

Heart rate, bpm

Filtered air

63 ± 2

63 ± 3

63 ± 3

61 ± 3

60 ± 2

59 ± 2

59 ± 2

58 ± 2

58 ± 2

59 ± 2

56 ± 2

0.12

Wood smoke

61 ± 3

63 ± 3

63 ± 3

62 ± 3

62 ± 3

61 ± 3

61 ± 3

60 ± 3

60 ± 3

58 ± 3

55 ± 2

∆ Augmentation pressure, mmHg

Filtered air

-

0.2 ± 0.5

−0.4 ± 0.7

−0.7 ± 0.6

−0.1 ± 0.7

−0.2 ± 0.7

0.1 ± 0.7

0.7 ± 0.7

-

-

-

0.90

Wood smoke

-

1.0 ± 0.8

−0.2 ± 0.3

−0.5 ± 0.3

−0.7 ± 0.4

−0.3 ± 0.5

0.6 ± 0.5

0.2 ± 0.5

-

-

-

∆ Augmentation index @75 bpm, %

Filtered air

-

0.01 ± 4.6

−1.7 ± 6.7

−3.9 ± 6.1

−2.8 ± 7.6

−3.0 ± 7.5

−2.2 ± 7.0

−1.2 ± 7.2

-

-

-

0.72

Wood smoke

-

2.3 ± 7.6

−1.1 ± 4.0

- 2.0 ± 5.1

−3.2 ± 5.0

−3.0 ± 6.4

−1.3 ± 6.7

−1.6 ± 6.0

-

-

-

∆ Pulse wave velocity, m/s

Filtered air

-

0.1 ± 0.1

0.0 ± 0.1

0.1 ± 0.1

0.0 ± 0.1

−0.1 ± 0.1

0.0 ± 0.1

0.4 ± 0.5

-

-

-

0.98

Wood smoke

-

0.0 ± 0.1

−0.1 ± 0.1

0.0 ± 0.1

−0.1 ± 0.1

0.0 ± 0.1

−0.1 ± 0.1

0.1 ± 0.1

-

-

-

  1. Values are reported as mean ± SEM.
  2. 12-way ANOVA with repeated measures comparing wood smoke and filtered air (baseline to 6 hrs); paired Students t-tests were performed for 24 hr means (P > 0.05 for all).