Demographic & Occupational variables

Hairdressers N (%)

Control N (%)

p-value

Age (years)

(28.9 ± 9.1)

(31.2 ± 8.3)

˃0.05

Marital status

Married

15 (37.5%)

18 (45%)

˃0.05

Single/divorced/widowed

25 (62.5%)

22 (55%)

˃0.05

Residence

Urban

37 (92.5%)

38 (95%)

˃0.05

Rural

3 (7.5%)

2 (5%)

Education

Illiterate and basic education

5 (12.5%)

0 (0%)

˃0.05

Secondary and above education

35 (87.5%)

40 (100%)

˃0.05

Length of service (years)

(13.2 ± 4.3)

(15.4 ± 5.2)

˃0.05

Work hours/week

(50.1 ± 5.5)

(30.4 ± 4.2)

<0.0001

Personal use of hair dyes

-Yes

10 (25%)

3 (7.5%)

˃0.05

-No

30 (75%)

37 (92.5%)

Use of personal hair dyes/year

(8.4 ± 2.3)

(4.5 ± 1.1)

<0.001