Table 1

Demographic and respiratory health characteristics of the study population (N=917)

Never cleaners
(n=70)
Former cleaners
(n=86)
Current cleaners
(n=761)
Age, mean (SD)37.8 (8.7)47.7 (10.0)44.9 (9.8)
Former smoker, n (%)11 (16)8 (13)77 (10)
Current smoker, n (%)26 (38)17 (28)235 (32)
Female, n (%)51 (73)49 (75)630 (83)
Non-Spanish, n (%)4 (6)13 (22)199 (29)
Wheeze without having a cold, n (%)7 (10)11 (17)83 (11)
Chronic cough, n (%)6 (9)10 (15)95 (13)
Ever asthma confirmed by a doctor, n (%)4 (6)8 (12)66 (9)
Current asthma, n (%)4 (6)6 (9)81 (11)
Asthma score, mean (SD)0.44 (0.87)0.56 (1.23)0.59 (1.12)
Adult-onset asthma, n (%)3 (4)5 (6)37 (5)