Table 1

Characteristics of the study population (n=4521)

*85 subjects in this category were employed both in domestic and non-domestic cleaning.
†120 subjects in this category had been domestic cleaners in the past.
Age 30 to 39 years70215.5
Age 40 to 49 years1,15025.4
Age 50 to 59 years1,75038.7
Age 60 to 65 years91920.3
Never smoked3,35574.2
Current smokers84718.7
Never worked in cleaning2,26250.0
Current domestic cleaners*59313.1
Current non-domestic cleaners†2956.5
Former domestic cleaners117025.9
Former non-domestic cleaners2014.4