Table 1

 Description of the study control population (n = 1271)

no. (%)
Gender
    Men1105 (86.9%)
    Women166 (13.1%)
Age (years)
    Mean (SD)65 (10)
    Range19–88
    Centiles 25, 50, 7559, 67, 72
Area
    Barcelona247 (19.4%)
    Vallès190 (14.9%)
    Alicante84 (6.6%)
    Tenerife226 (17.8%)
    Asturias524 (41.3%)
Average residential THM (μg/l)
    Mean (SD)32.2 (28.1)
    Range0–142.8
Average ingestion THM in the home (μg/day)
    Mean (SD)23.7 (33.8)
    Range0–243.3
Duration of shower/bath × average residential THM (min/day)*(μg/l)
    Mean (SD)296.3 (532.4)
    Range0–8062.4