Table 1

Age, occurrence of atopy, and smoking habits among hairdressers and a control group of office workers

	Hairdresser (n=91)	Office worker (n=80)	p Value
Mean age (y)	33	44	0.01^1-151
< 30 (%)	49	19
31-40 (%)	30	24
>41 (%)	21	57
Atopy:^1-150
Yes (%)	65	60	0.05^1-152
Smoking			0.03^1-152
Non-smoker (%)	25	46
Ex-smoker (%)	25	23
Current smoker(%)	50	32
Cigarettes/day (mean)	12	9	0.02^1-151
Hair treatment customers/week (mean)	13

↵1-150 Based on the question: “have you ever had: asthma, hay fever, or eczema?”
↵1-151 Student's t test.
↵1-152 χ² test.