Comet classes

0

1

2

3

4

Total Comet score

p-value

Hairdressers

(± SD)

36.3 ± 9.2

28.6 ± 6.89

19.2 ± 5.41

15.65 ± 6.63

9.65 ± 2.23

161.15 ± 45.84

<0.0001

Control

(± SD)

75.9 ± 17.2

7.95 ± 1.79

5.35 ± 2.99

3.25 ± 1.25

1.5 ± 0.83

93.6 ± 20.13